--- _id: '8262' abstract: - lang: eng text: "Background: The genus Burkholderia consists of species that occupy remarkably diverse ecological niches. Its best known members are important pathogens, B. mallei and B. pseudomallei, which cause glanders and melioidosis, respectively. Burkholderia genomes are unusual due to their multichromosomal organization, generally comprised of 2-3 chromosomes.\r\n\r\nResults: We performed integrated genomic analysis of 127 Burkholderia strains. The pan-genome is open with the saturation to be reached between 86,000 and 88,000 genes. The reconstructed rearrangements indicate a strong avoidance of intra-replichore inversions that is likely caused by selection against the transfer of large groups of genes between the leading and the lagging strands. Translocated genes also tend to retain their position in the leading or the lagging strand, and this selection is stronger for large syntenies. Integrated reconstruction of chromosome rearrangements in the context of strains phylogeny reveals parallel rearrangements that may indicate inversion-based phase variation and integration of new genomic islands. In particular, we detected parallel inversions in the second chromosomes of B. pseudomallei with breakpoints formed by genes encoding membrane components of multidrug resistance complex, that may be linked to a phase variation mechanism. Two genomic islands, spreading horizontally between chromosomes, were detected in the B. cepacia group.\r\n\r\nConclusions: This study demonstrates the power of integrated analysis of pan-genomes, chromosome rearrangements, and selection regimes. Non-random inversion patterns indicate selective pressure, inversions are particularly frequent in a recent pathogen B. mallei, and, together with periods of positive selection at other branches, may indicate adaptation to new niches. One such adaptation could be a possible phase variation mechanism in B. pseudomallei." article_number: '965' article_processing_charge: No article_type: original author: - first_name: Olga full_name: Bochkareva, Olga id: C4558D3C-6102-11E9-A62E-F418E6697425 last_name: Bochkareva orcid: 0000-0003-1006-6639 - first_name: Elena V. full_name: Moroz, Elena V. last_name: Moroz - first_name: Iakov I. full_name: Davydov, Iakov I. last_name: Davydov - first_name: Mikhail S. full_name: Gelfand, Mikhail S. last_name: Gelfand citation: ama: Bochkareva O, Moroz EV, Davydov II, Gelfand MS. Genome rearrangements and selection in multi-chromosome bacteria Burkholderia spp. BMC Genomics. 2018;19. doi:10.1186/s12864-018-5245-1 apa: Bochkareva, O., Moroz, E. V., Davydov, I. I., & Gelfand, M. S. (2018). Genome rearrangements and selection in multi-chromosome bacteria Burkholderia spp. BMC Genomics. Springer Nature. https://doi.org/10.1186/s12864-018-5245-1 chicago: Bochkareva, Olga, Elena V. Moroz, Iakov I. Davydov, and Mikhail S. Gelfand. “Genome Rearrangements and Selection in Multi-Chromosome Bacteria Burkholderia Spp.” BMC Genomics. Springer Nature, 2018. https://doi.org/10.1186/s12864-018-5245-1. ieee: O. Bochkareva, E. V. Moroz, I. I. Davydov, and M. S. Gelfand, “Genome rearrangements and selection in multi-chromosome bacteria Burkholderia spp.,” BMC Genomics, vol. 19. Springer Nature, 2018. ista: Bochkareva O, Moroz EV, Davydov II, Gelfand MS. 2018. Genome rearrangements and selection in multi-chromosome bacteria Burkholderia spp. BMC Genomics. 19, 965. mla: Bochkareva, Olga, et al. “Genome Rearrangements and Selection in Multi-Chromosome Bacteria Burkholderia Spp.” BMC Genomics, vol. 19, 965, Springer Nature, 2018, doi:10.1186/s12864-018-5245-1. short: O. Bochkareva, E.V. Moroz, I.I. Davydov, M.S. Gelfand, BMC Genomics 19 (2018). date_created: 2020-08-15T11:02:08Z date_published: 2018-12-27T00:00:00Z date_updated: 2023-02-23T13:28:52Z day: '27' doi: 10.1186/s12864-018-5245-1 extern: '1' intvolume: ' 19' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1186/s12864-018-5245-1 month: '12' oa: 1 oa_version: Published Version publication: BMC Genomics publication_identifier: issn: - 1471-2164 publication_status: published publisher: Springer Nature quality_controlled: '1' status: public title: Genome rearrangements and selection in multi-chromosome bacteria Burkholderia spp. type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 19 year: '2018' ... --- _id: '8265' abstract: - lang: eng text: Genome rearrangements have played an important role in the evolution of Yersinia pestis from its progenitor Yersinia pseudotuberculosis. Traditional phylogenetic trees for Y. pestis based on sequence comparison have short internal branches and low bootstrap supports as only a small number of nucleotide substitutions have occurred. On the other hand, even a small number of genome rearrangements may resolve topological ambiguities in a phylogenetic tree. We reconstructed phylogenetic trees based on genome rearrangements using several popular approaches such as Maximum likelihood for Gene Order and the Bayesian model of genome rearrangements by inversions. We also reconciled phylogenetic trees for each of the three CRISPR loci to obtain an integrated scenario of the CRISPR cassette evolution. Analysis of contradictions between the obtained evolutionary trees yielded numerous parallel inversions and gain/loss events. Our data indicate that an integrated analysis of sequence-based and inversion-based trees enhances the resolution of phylogenetic reconstruction. In contrast, reconstructions of strain relationships based on solely CRISPR loci may not be reliable, as the history is obscured by large deletions, obliterating the order of spacer gains. Similarly, numerous parallel gene losses preclude reconstruction of phylogeny based on gene content. article_number: e4545 article_processing_charge: No article_type: original author: - first_name: Olga full_name: Bochkareva, Olga id: C4558D3C-6102-11E9-A62E-F418E6697425 last_name: Bochkareva orcid: 0000-0003-1006-6639 - first_name: Natalia O. full_name: Dranenko, Natalia O. last_name: Dranenko - first_name: Elena S. full_name: Ocheredko, Elena S. last_name: Ocheredko - first_name: German M. full_name: Kanevsky, German M. last_name: Kanevsky - first_name: Yaroslav N. full_name: Lozinsky, Yaroslav N. last_name: Lozinsky - first_name: Vera A. full_name: Khalaycheva, Vera A. last_name: Khalaycheva - first_name: Irena I. full_name: Artamonova, Irena I. last_name: Artamonova - first_name: Mikhail S. full_name: Gelfand, Mikhail S. last_name: Gelfand citation: ama: Bochkareva O, Dranenko NO, Ocheredko ES, et al. Genome rearrangements and phylogeny reconstruction in Yersinia pestis. PeerJ. 2018;6. doi:10.7717/peerj.4545 apa: Bochkareva, O., Dranenko, N. O., Ocheredko, E. S., Kanevsky, G. M., Lozinsky, Y. N., Khalaycheva, V. A., … Gelfand, M. S. (2018). Genome rearrangements and phylogeny reconstruction in Yersinia pestis. PeerJ. PeerJ. https://doi.org/10.7717/peerj.4545 chicago: Bochkareva, Olga, Natalia O. Dranenko, Elena S. Ocheredko, German M. Kanevsky, Yaroslav N. Lozinsky, Vera A. Khalaycheva, Irena I. Artamonova, and Mikhail S. Gelfand. “Genome Rearrangements and Phylogeny Reconstruction in Yersinia Pestis.” PeerJ. PeerJ, 2018. https://doi.org/10.7717/peerj.4545. ieee: O. Bochkareva et al., “Genome rearrangements and phylogeny reconstruction in Yersinia pestis,” PeerJ, vol. 6. PeerJ, 2018. ista: Bochkareva O, Dranenko NO, Ocheredko ES, Kanevsky GM, Lozinsky YN, Khalaycheva VA, Artamonova II, Gelfand MS. 2018. Genome rearrangements and phylogeny reconstruction in Yersinia pestis. PeerJ. 6, e4545. mla: Bochkareva, Olga, et al. “Genome Rearrangements and Phylogeny Reconstruction in Yersinia Pestis.” PeerJ, vol. 6, e4545, PeerJ, 2018, doi:10.7717/peerj.4545. short: O. Bochkareva, N.O. Dranenko, E.S. Ocheredko, G.M. Kanevsky, Y.N. Lozinsky, V.A. Khalaycheva, I.I. Artamonova, M.S. Gelfand, PeerJ 6 (2018). date_created: 2020-08-15T11:08:23Z date_published: 2018-03-27T00:00:00Z date_updated: 2023-02-23T13:28:57Z day: '27' doi: 10.7717/peerj.4545 extern: '1' external_id: pmid: - '29607260' intvolume: ' 6' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.7717/peerj.4545 month: '03' oa: 1 oa_version: Published Version pmid: 1 publication: PeerJ publication_identifier: issn: - 2167-8359 publication_status: published publisher: PeerJ quality_controlled: '1' status: public title: Genome rearrangements and phylogeny reconstruction in Yersinia pestis type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 6 year: '2018' ... --- _id: '8274' abstract: - lang: eng text: 'Background/Aim: Our aim was to investigate the crosstalk between tumor and immune cells (M2 macrophages) and its effects on cyclo-oxygenase-2 (COX2) regulation in canine mammary tumors (CMT). Materials and Methods: Sh1b CMT cells and human BT474 mammary or HT29 colon cancer cells were co-cultured with canine peripheral blood mononuclear cells (PBMCs) or with macrophage-like differentiated THP1 monocytes (dTHP1). Intracellular COX2 expression by PBMCs, dTHP1 and cancer cells was evaluated by flow cytometry. Results: Co-culturing of Sh1b and canine PBMCs induced COX2 overexpression in CMT cells. In turn, COX2 expression by PBMCs, mostly CD68+ macrophages, was attenuated by co-culture with Sh1b (p=0.0001). In accordance, co-culture with dTHP1 prompted intracellular production of COX2 in both Sh1b CMT cells and HT29 human colon cancer cells and reduced production of COX2 in BT474 human mammary cancer cells. The intracellular COX2 expression from dTHP1 decreased when treated with conditioned medium from cultured Sh1b and HT29 cancer cells. Conclusion: Bidirectional COX2 regulation between cancer and monocytes/macrophages might shape a tolerogenic tumor microenvironment in CMT.' article_processing_charge: No article_type: original author: - first_name: Maria Isabel full_name: Carvalho, Maria Isabel last_name: Carvalho - first_name: Rodolfo full_name: Bianchini, Rodolfo last_name: Bianchini - first_name: Judit full_name: Fazekas-Singer, Judit id: 36432834-F248-11E8-B48F-1D18A9856A87 last_name: Fazekas-Singer orcid: 0000-0002-8777-3502 - first_name: Ina full_name: Herrmann, Ina last_name: Herrmann - first_name: Irene full_name: Flickinger, Irene last_name: Flickinger - first_name: Johann G. full_name: Thalhammer, Johann G. last_name: Thalhammer - first_name: Isabel full_name: Pires, Isabel last_name: Pires - first_name: Erika full_name: Jensen-Jarolim, Erika last_name: Jensen-Jarolim - first_name: Felisbina L. full_name: Queiroga, Felisbina L. last_name: Queiroga citation: ama: Carvalho MI, Bianchini R, Singer J, et al. Bidirectional regulation of COX-2 expression between cancer cells and macrophages. Anticancer Research. 2018;38(5):2811-2817. doi:10.21873/anticanres.12525 apa: Carvalho, M. I., Bianchini, R., Singer, J., Herrmann, I., Flickinger, I., Thalhammer, J. G., … Queiroga, F. L. (2018). Bidirectional regulation of COX-2 expression between cancer cells and macrophages. Anticancer Research. International Institute of Anticancer Research. https://doi.org/10.21873/anticanres.12525 chicago: Carvalho, Maria Isabel, Rodolfo Bianchini, Judit Singer, Ina Herrmann, Irene Flickinger, Johann G. Thalhammer, Isabel Pires, Erika Jensen-Jarolim, and Felisbina L. Queiroga. “Bidirectional Regulation of COX-2 Expression between Cancer Cells and Macrophages.” Anticancer Research. International Institute of Anticancer Research, 2018. https://doi.org/10.21873/anticanres.12525. ieee: M. I. Carvalho et al., “Bidirectional regulation of COX-2 expression between cancer cells and macrophages,” Anticancer Research, vol. 38, no. 5. International Institute of Anticancer Research, pp. 2811–2817, 2018. ista: Carvalho MI, Bianchini R, Singer J, Herrmann I, Flickinger I, Thalhammer JG, Pires I, Jensen-Jarolim E, Queiroga FL. 2018. Bidirectional regulation of COX-2 expression between cancer cells and macrophages. Anticancer Research. 38(5), 2811–2817. mla: Carvalho, Maria Isabel, et al. “Bidirectional Regulation of COX-2 Expression between Cancer Cells and Macrophages.” Anticancer Research, vol. 38, no. 5, International Institute of Anticancer Research, 2018, pp. 2811–17, doi:10.21873/anticanres.12525. short: M.I. Carvalho, R. Bianchini, J. Singer, I. Herrmann, I. Flickinger, J.G. Thalhammer, I. Pires, E. Jensen-Jarolim, F.L. Queiroga, Anticancer Research 38 (2018) 2811–2817. date_created: 2020-08-17T07:13:55Z date_published: 2018-05-01T00:00:00Z date_updated: 2021-01-12T08:17:52Z day: '01' doi: 10.21873/anticanres.12525 extern: '1' intvolume: ' 38' issue: '5' language: - iso: eng month: '05' oa_version: None page: 2811-2817 publication: Anticancer Research publication_identifier: eissn: - 1791-7530 issn: - 0250-7005 publication_status: published publisher: International Institute of Anticancer Research quality_controlled: '1' status: public title: Bidirectional regulation of COX-2 expression between cancer cells and macrophages type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 38 year: '2018' ... --- _id: '8298' abstract: - lang: eng text: Sharding, or partitioning the system’s state so that different subsets of participants handle it, is a proven approach to building distributed systems whose total capacity scales horizontally with the number of participants. Many distributed ledgers have adopted this approach to increase their performance, however, they focus on the permissionless setting that assumes the existence of a strong adversary. In this paper, we deploy channels for permissioned blockchains. Our first contribution is to adapt sharding on asset-management applications for the permissioned setting, while preserving liveness and safety even on transactions spanning across-channels. Our second contribution is to leverage channels as a confidentiality boundary, enabling different organizations and consortia to preserve their privacy within their channels and still be part of a bigger collaborative ecosystem. To make our system concrete we map it on top of Hyperledger Fabric. alternative_title: - LNCS article_processing_charge: No author: - first_name: Elli full_name: Androulaki, Elli last_name: Androulaki - first_name: Christian full_name: Cachin, Christian last_name: Cachin - first_name: Angelo full_name: De Caro, Angelo last_name: De Caro - first_name: Eleftherios full_name: Kokoris Kogias, Eleftherios id: f5983044-d7ef-11ea-ac6d-fd1430a26d30 last_name: Kokoris Kogias citation: ama: 'Androulaki E, Cachin C, De Caro A, Kokoris Kogias E. Channels: Horizontal scaling and confidentiality on permissioned blockchains. In: Computer Security. Vol 11098. Springer Nature; 2018:111-131. doi:10.1007/978-3-319-99073-6_6' apa: 'Androulaki, E., Cachin, C., De Caro, A., & Kokoris Kogias, E. (2018). Channels: Horizontal scaling and confidentiality on permissioned blockchains. In Computer Security (Vol. 11098, pp. 111–131). Barcelona, Spain: Springer Nature. https://doi.org/10.1007/978-3-319-99073-6_6' chicago: 'Androulaki, Elli, Christian Cachin, Angelo De Caro, and Eleftherios Kokoris Kogias. “Channels: Horizontal Scaling and Confidentiality on Permissioned Blockchains.” In Computer Security, 11098:111–31. Springer Nature, 2018. https://doi.org/10.1007/978-3-319-99073-6_6.' ieee: 'E. Androulaki, C. Cachin, A. De Caro, and E. Kokoris Kogias, “Channels: Horizontal scaling and confidentiality on permissioned blockchains,” in Computer Security, Barcelona, Spain, 2018, vol. 11098, pp. 111–131.' ista: 'Androulaki E, Cachin C, De Caro A, Kokoris Kogias E. 2018. Channels: Horizontal scaling and confidentiality on permissioned blockchains. Computer Security. ESORICS: European Symposium on Research in Computer Security, LNCS, vol. 11098, 111–131.' mla: 'Androulaki, Elli, et al. “Channels: Horizontal Scaling and Confidentiality on Permissioned Blockchains.” Computer Security, vol. 11098, Springer Nature, 2018, pp. 111–31, doi:10.1007/978-3-319-99073-6_6.' short: E. Androulaki, C. Cachin, A. De Caro, E. Kokoris Kogias, in:, Computer Security, Springer Nature, 2018, pp. 111–131. conference: end_date: 2018-09-07 location: Barcelona, Spain name: 'ESORICS: European Symposium on Research in Computer Security' start_date: 2018-09-03 date_created: 2020-08-26T11:47:34Z date_published: 2018-08-08T00:00:00Z date_updated: 2021-01-12T08:17:57Z day: '08' doi: 10.1007/978-3-319-99073-6_6 extern: '1' intvolume: ' 11098' language: - iso: eng month: '08' oa_version: None page: 111-131 publication: Computer Security publication_identifier: eisbn: - '9783319990736' isbn: - '9783319990729' issn: - 0302-9743 - 1611-3349 publication_status: published publisher: Springer Nature quality_controlled: '1' status: public title: 'Channels: Horizontal scaling and confidentiality on permissioned blockchains' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 11098 year: '2018' ... --- _id: '8297' abstract: - lang: eng text: "Designing a secure permissionless distributed ledger (blockchain) that performs on par with centralized payment\r\nprocessors, such as Visa, is a challenging task. Most existing distributed ledgers are unable to scale-out, i.e., to grow their totalprocessing capacity with the number of validators; and those that do, compromise security or decentralization. We present OmniLedger, a novel scale-out distributed ledger that preserves longterm security under permissionless operation. It ensures security and correctness by using a bias-resistant public-randomness protocol for choosing large, statistically representative shards that process transactions, and by introducing an efficient crossshard commit protocol that atomically handles transactions affecting multiple shards. OmniLedger also optimizes performance via parallel intra-shard transaction processing, ledger pruning via collectively-signed state blocks, and low-latency “trust-butverify” \r\nvalidation for low-value transactions. An evaluation ofour experimental prototype shows that OmniLedger’s throughput\r\nscales linearly in the number of active validators, supporting Visa-level workloads and beyond, while confirming typical transactions in under two seconds." article_processing_charge: No author: - first_name: Eleftherios full_name: Kokoris Kogias, Eleftherios id: f5983044-d7ef-11ea-ac6d-fd1430a26d30 last_name: Kokoris Kogias - first_name: Philipp full_name: Jovanovic, Philipp last_name: Jovanovic - first_name: Linus full_name: Gasser, Linus last_name: Gasser - first_name: Nicolas full_name: Gailly, Nicolas last_name: Gailly - first_name: Ewa full_name: Syta, Ewa last_name: Syta - first_name: Bryan full_name: Ford, Bryan last_name: Ford citation: ama: 'Kokoris Kogias E, Jovanovic P, Gasser L, Gailly N, Syta E, Ford B. OmniLedger: A secure, scale-out, decentralized ledger via sharding. In: 2018 IEEE Symposium on Security and Privacy. IEEE; 2018:583-598. doi:10.1109/sp.2018.000-5' apa: 'Kokoris Kogias, E., Jovanovic, P., Gasser, L., Gailly, N., Syta, E., & Ford, B. (2018). OmniLedger: A secure, scale-out, decentralized ledger via sharding. In 2018 IEEE Symposium on Security and Privacy (pp. 583–598). San Francisco, CA, United States: IEEE. https://doi.org/10.1109/sp.2018.000-5' chicago: 'Kokoris Kogias, Eleftherios, Philipp Jovanovic, Linus Gasser, Nicolas Gailly, Ewa Syta, and Bryan Ford. “OmniLedger: A Secure, Scale-out, Decentralized Ledger via Sharding.” In 2018 IEEE Symposium on Security and Privacy, 583–98. IEEE, 2018. https://doi.org/10.1109/sp.2018.000-5.' ieee: 'E. Kokoris Kogias, P. Jovanovic, L. Gasser, N. Gailly, E. Syta, and B. Ford, “OmniLedger: A secure, scale-out, decentralized ledger via sharding,” in 2018 IEEE Symposium on Security and Privacy, San Francisco, CA, United States, 2018, pp. 583–598.' ista: 'Kokoris Kogias E, Jovanovic P, Gasser L, Gailly N, Syta E, Ford B. 2018. OmniLedger: A secure, scale-out, decentralized ledger via sharding. 2018 IEEE Symposium on Security and Privacy. SP: Symposium on Security and Privacy, 583–598.' mla: 'Kokoris Kogias, Eleftherios, et al. “OmniLedger: A Secure, Scale-out, Decentralized Ledger via Sharding.” 2018 IEEE Symposium on Security and Privacy, IEEE, 2018, pp. 583–98, doi:10.1109/sp.2018.000-5.' short: E. Kokoris Kogias, P. Jovanovic, L. Gasser, N. Gailly, E. Syta, B. Ford, in:, 2018 IEEE Symposium on Security and Privacy, IEEE, 2018, pp. 583–598. conference: end_date: 2018-05-24 location: San Francisco, CA, United States name: 'SP: Symposium on Security and Privacy' start_date: 2018-05-20 date_created: 2020-08-26T11:46:35Z date_published: 2018-07-26T00:00:00Z date_updated: 2021-01-12T08:17:56Z day: '26' doi: 10.1109/sp.2018.000-5 extern: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://eprint.iacr.org/2017/406 month: '07' oa: 1 oa_version: Preprint page: 583-598 publication: 2018 IEEE Symposium on Security and Privacy publication_identifier: isbn: - '9781538643532' issn: - 2375-1207 publication_status: published publisher: IEEE quality_controlled: '1' status: public title: 'OmniLedger: A secure, scale-out, decentralized ledger via sharding' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2018' ... --- _id: '8443' abstract: - lang: eng text: Characterizing the structure of membrane proteins (MPs) generally requires extraction from their native environment, most commonly with detergents. Yet, the physicochemical properties of detergent micelles and lipid bilayers differ markedly and could alter the structural organization of MPs, albeit without general rules. Dodecylphosphocholine (DPC) is the most widely used detergent for MP structure determination by NMR, but the physiological relevance of several prominent structures has been questioned, though indirectly, by other biophysical techniques, e.g., functional/thermostability assay (TSA) and molecular dynamics (MD) simulations. Here, we resolve unambiguously this controversy by probing the functional relevance of three different mitochondrial carriers (MCs) in DPC at the atomic level, using an exhaustive set of solution-NMR experiments, complemented by functional/TSA and MD data. Our results provide atomic-level insight into the structure, substrate interaction and dynamics of the detergent–membrane protein complexes and demonstrates cogently that, while high-resolution NMR signals can be obtained for MCs in DPC, they systematically correspond to nonfunctional states. article_processing_charge: No article_type: original author: - first_name: Vilius full_name: Kurauskas, Vilius last_name: Kurauskas - first_name: Audrey full_name: Hessel, Audrey last_name: Hessel - first_name: Peixiang full_name: Ma, Peixiang last_name: Ma - first_name: Paola full_name: Lunetti, Paola last_name: Lunetti - first_name: Katharina full_name: Weinhäupl, Katharina last_name: Weinhäupl - first_name: Lionel full_name: Imbert, Lionel last_name: Imbert - first_name: Bernhard full_name: Brutscher, Bernhard last_name: Brutscher - first_name: Martin S. full_name: King, Martin S. last_name: King - first_name: Rémy full_name: Sounier, Rémy last_name: Sounier - first_name: Vincenza full_name: Dolce, Vincenza last_name: Dolce - first_name: Edmund R. S. full_name: Kunji, Edmund R. S. last_name: Kunji - first_name: Loredana full_name: Capobianco, Loredana last_name: Capobianco - first_name: Christophe full_name: Chipot, Christophe last_name: Chipot - first_name: François full_name: Dehez, François last_name: Dehez - first_name: Beate full_name: Bersch, Beate last_name: Bersch - first_name: Paul full_name: Schanda, Paul id: 7B541462-FAF6-11E9-A490-E8DFE5697425 last_name: Schanda orcid: 0000-0002-9350-7606 citation: ama: 'Kurauskas V, Hessel A, Ma P, et al. How detergent impacts membrane proteins: Atomic-level views of mitochondrial carriers in dodecylphosphocholine. The Journal of Physical Chemistry Letters. 2018;9(5):933-938. doi:10.1021/acs.jpclett.8b00269' apa: 'Kurauskas, V., Hessel, A., Ma, P., Lunetti, P., Weinhäupl, K., Imbert, L., … Schanda, P. (2018). How detergent impacts membrane proteins: Atomic-level views of mitochondrial carriers in dodecylphosphocholine. The Journal of Physical Chemistry Letters. American Chemical Society. https://doi.org/10.1021/acs.jpclett.8b00269' chicago: 'Kurauskas, Vilius, Audrey Hessel, Peixiang Ma, Paola Lunetti, Katharina Weinhäupl, Lionel Imbert, Bernhard Brutscher, et al. “How Detergent Impacts Membrane Proteins: Atomic-Level Views of Mitochondrial Carriers in Dodecylphosphocholine.” The Journal of Physical Chemistry Letters. American Chemical Society, 2018. https://doi.org/10.1021/acs.jpclett.8b00269.' ieee: 'V. Kurauskas et al., “How detergent impacts membrane proteins: Atomic-level views of mitochondrial carriers in dodecylphosphocholine,” The Journal of Physical Chemistry Letters, vol. 9, no. 5. American Chemical Society, pp. 933–938, 2018.' ista: 'Kurauskas V, Hessel A, Ma P, Lunetti P, Weinhäupl K, Imbert L, Brutscher B, King MS, Sounier R, Dolce V, Kunji ERS, Capobianco L, Chipot C, Dehez F, Bersch B, Schanda P. 2018. How detergent impacts membrane proteins: Atomic-level views of mitochondrial carriers in dodecylphosphocholine. The Journal of Physical Chemistry Letters. 9(5), 933–938.' mla: 'Kurauskas, Vilius, et al. “How Detergent Impacts Membrane Proteins: Atomic-Level Views of Mitochondrial Carriers in Dodecylphosphocholine.” The Journal of Physical Chemistry Letters, vol. 9, no. 5, American Chemical Society, 2018, pp. 933–38, doi:10.1021/acs.jpclett.8b00269.' short: V. Kurauskas, A. Hessel, P. Ma, P. Lunetti, K. Weinhäupl, L. Imbert, B. Brutscher, M.S. King, R. Sounier, V. Dolce, E.R.S. Kunji, L. Capobianco, C. Chipot, F. Dehez, B. Bersch, P. Schanda, The Journal of Physical Chemistry Letters 9 (2018) 933–938. date_created: 2020-09-18T10:05:45Z date_published: 2018-02-03T00:00:00Z date_updated: 2021-01-12T08:19:18Z day: '03' doi: 10.1021/acs.jpclett.8b00269 extern: '1' intvolume: ' 9' issue: '5' keyword: - General Materials Science language: - iso: eng month: '02' oa_version: None page: 933-938 publication: The Journal of Physical Chemistry Letters publication_identifier: issn: - 1948-7185 publication_status: published publisher: American Chemical Society quality_controlled: '1' status: public title: 'How detergent impacts membrane proteins: Atomic-level views of mitochondrial carriers in dodecylphosphocholine' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 9 year: '2018' ... --- _id: '8440' abstract: - lang: eng text: Mycobacterium tuberculosis can remain dormant in the host, an ability that explains the failure of many current tuberculosis treatments. Recently, the natural products cyclomarin, ecumicin, and lassomycin have been shown to efficiently kill Mycobacterium tuberculosis persisters. Their target is the N-terminal domain of the hexameric AAA+ ATPase ClpC1, which recognizes, unfolds, and translocates protein substrates, such as proteins containing phosphorylated arginine residues, to the ClpP1P2 protease for degradation. Surprisingly, these antibiotics do not inhibit ClpC1 ATPase activity, and how they cause cell death is still unclear. Here, using NMR and small-angle X-ray scattering, we demonstrate that arginine-phosphate binding to the ClpC1 N-terminal domain induces millisecond dynamics. We show that these dynamics are caused by conformational changes and do not result from unfolding or oligomerization of this domain. Cyclomarin binding to this domain specifically blocked these N-terminal dynamics. On the basis of these results, we propose a mechanism of action involving cyclomarin-induced restriction of ClpC1 dynamics, which modulates the chaperone enzymatic activity leading eventually to cell death. article_processing_charge: No article_type: original author: - first_name: Katharina full_name: Weinhäupl, Katharina last_name: Weinhäupl - first_name: Martha full_name: Brennich, Martha last_name: Brennich - first_name: Uli full_name: Kazmaier, Uli last_name: Kazmaier - first_name: Joel full_name: Lelievre, Joel last_name: Lelievre - first_name: Lluis full_name: Ballell, Lluis last_name: Ballell - first_name: Alfred full_name: Goldberg, Alfred last_name: Goldberg - first_name: Paul full_name: Schanda, Paul id: 7B541462-FAF6-11E9-A490-E8DFE5697425 last_name: Schanda orcid: 0000-0002-9350-7606 - first_name: Hugo full_name: Fraga, Hugo last_name: Fraga citation: ama: Weinhäupl K, Brennich M, Kazmaier U, et al. The antibiotic cyclomarin blocks arginine-phosphate–induced millisecond dynamics in the N-terminal domain of ClpC1 from Mycobacterium tuberculosis. Journal of Biological Chemistry. 2018;293(22):8379-8393. doi:10.1074/jbc.ra118.002251 apa: Weinhäupl, K., Brennich, M., Kazmaier, U., Lelievre, J., Ballell, L., Goldberg, A., … Fraga, H. (2018). The antibiotic cyclomarin blocks arginine-phosphate–induced millisecond dynamics in the N-terminal domain of ClpC1 from Mycobacterium tuberculosis. Journal of Biological Chemistry. American Society for Biochemistry & Molecular Biology. https://doi.org/10.1074/jbc.ra118.002251 chicago: Weinhäupl, Katharina, Martha Brennich, Uli Kazmaier, Joel Lelievre, Lluis Ballell, Alfred Goldberg, Paul Schanda, and Hugo Fraga. “The Antibiotic Cyclomarin Blocks Arginine-Phosphate–Induced Millisecond Dynamics in the N-Terminal Domain of ClpC1 from Mycobacterium Tuberculosis.” Journal of Biological Chemistry. American Society for Biochemistry & Molecular Biology, 2018. https://doi.org/10.1074/jbc.ra118.002251. ieee: K. Weinhäupl et al., “The antibiotic cyclomarin blocks arginine-phosphate–induced millisecond dynamics in the N-terminal domain of ClpC1 from Mycobacterium tuberculosis,” Journal of Biological Chemistry, vol. 293, no. 22. American Society for Biochemistry & Molecular Biology, pp. 8379–8393, 2018. ista: Weinhäupl K, Brennich M, Kazmaier U, Lelievre J, Ballell L, Goldberg A, Schanda P, Fraga H. 2018. The antibiotic cyclomarin blocks arginine-phosphate–induced millisecond dynamics in the N-terminal domain of ClpC1 from Mycobacterium tuberculosis. Journal of Biological Chemistry. 293(22), 8379–8393. mla: Weinhäupl, Katharina, et al. “The Antibiotic Cyclomarin Blocks Arginine-Phosphate–Induced Millisecond Dynamics in the N-Terminal Domain of ClpC1 from Mycobacterium Tuberculosis.” Journal of Biological Chemistry, vol. 293, no. 22, American Society for Biochemistry & Molecular Biology, 2018, pp. 8379–93, doi:10.1074/jbc.ra118.002251. short: K. Weinhäupl, M. Brennich, U. Kazmaier, J. Lelievre, L. Ballell, A. Goldberg, P. Schanda, H. Fraga, Journal of Biological Chemistry 293 (2018) 8379–8393. date_created: 2020-09-18T10:05:18Z date_published: 2018-06-01T00:00:00Z date_updated: 2021-01-12T08:19:17Z day: '01' doi: 10.1074/jbc.ra118.002251 extern: '1' intvolume: ' 293' issue: '22' keyword: - Cell Biology - Biochemistry - Molecular Biology language: - iso: eng month: '06' oa_version: None page: 8379-8393 publication: Journal of Biological Chemistry publication_identifier: issn: - 0021-9258 - 1083-351X publication_status: published publisher: American Society for Biochemistry & Molecular Biology quality_controlled: '1' status: public title: The antibiotic cyclomarin blocks arginine-phosphate–induced millisecond dynamics in the N-terminal domain of ClpC1 from Mycobacterium tuberculosis type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 293 year: '2018' ... --- _id: '8442' abstract: - lang: eng text: Membrane proteins perform a host of vital cellular functions. Deciphering the molecular mechanisms whereby they fulfill these functions requires detailed biophysical and structural investigations. Detergents have proven pivotal to extract the protein from its native surroundings. Yet, they provide a milieu that departs significantly from that of the biological membrane, to the extent that the structure, the dynamics, and the interactions of membrane proteins in detergents may considerably vary, as compared to the native environment. Understanding the impact of detergents on membrane proteins is, therefore, crucial to assess the biological relevance of results obtained in detergents. Here, we review the strengths and weaknesses of alkyl phosphocholines (or foscholines), the most widely used detergent in solution-NMR studies of membrane proteins. While this class of detergents is often successful for membrane protein solubilization, a growing list of examples points to destabilizing and denaturing properties, in particular for α-helical membrane proteins. Our comprehensive analysis stresses the importance of stringent controls when working with this class of detergents and when analyzing the structure and dynamics of membrane proteins in alkyl phosphocholine detergents. article_processing_charge: No article_type: original author: - first_name: Christophe full_name: Chipot, Christophe last_name: Chipot - first_name: François full_name: Dehez, François last_name: Dehez - first_name: Jason R. full_name: Schnell, Jason R. last_name: Schnell - first_name: Nicole full_name: Zitzmann, Nicole last_name: Zitzmann - first_name: Eva full_name: Pebay-Peyroula, Eva last_name: Pebay-Peyroula - first_name: Laurent J. full_name: Catoire, Laurent J. last_name: Catoire - first_name: Bruno full_name: Miroux, Bruno last_name: Miroux - first_name: Edmund R. S. full_name: Kunji, Edmund R. S. last_name: Kunji - first_name: Gianluigi full_name: Veglia, Gianluigi last_name: Veglia - first_name: Timothy A. full_name: Cross, Timothy A. last_name: Cross - first_name: Paul full_name: Schanda, Paul id: 7B541462-FAF6-11E9-A490-E8DFE5697425 last_name: Schanda orcid: 0000-0002-9350-7606 citation: ama: 'Chipot C, Dehez F, Schnell JR, et al. Perturbations of native membrane protein structure in alkyl phosphocholine detergents: A critical assessment of NMR and biophysical studies. Chemical Reviews. 2018;118(7):3559-3607. doi:10.1021/acs.chemrev.7b00570' apa: 'Chipot, C., Dehez, F., Schnell, J. R., Zitzmann, N., Pebay-Peyroula, E., Catoire, L. J., … Schanda, P. (2018). Perturbations of native membrane protein structure in alkyl phosphocholine detergents: A critical assessment of NMR and biophysical studies. Chemical Reviews. American Chemical Society. https://doi.org/10.1021/acs.chemrev.7b00570' chicago: 'Chipot, Christophe, François Dehez, Jason R. Schnell, Nicole Zitzmann, Eva Pebay-Peyroula, Laurent J. Catoire, Bruno Miroux, et al. “Perturbations of Native Membrane Protein Structure in Alkyl Phosphocholine Detergents: A Critical Assessment of NMR and Biophysical Studies.” Chemical Reviews. American Chemical Society, 2018. https://doi.org/10.1021/acs.chemrev.7b00570.' ieee: 'C. Chipot et al., “Perturbations of native membrane protein structure in alkyl phosphocholine detergents: A critical assessment of NMR and biophysical studies,” Chemical Reviews, vol. 118, no. 7. American Chemical Society, pp. 3559–3607, 2018.' ista: 'Chipot C, Dehez F, Schnell JR, Zitzmann N, Pebay-Peyroula E, Catoire LJ, Miroux B, Kunji ERS, Veglia G, Cross TA, Schanda P. 2018. Perturbations of native membrane protein structure in alkyl phosphocholine detergents: A critical assessment of NMR and biophysical studies. Chemical Reviews. 118(7), 3559–3607.' mla: 'Chipot, Christophe, et al. “Perturbations of Native Membrane Protein Structure in Alkyl Phosphocholine Detergents: A Critical Assessment of NMR and Biophysical Studies.” Chemical Reviews, vol. 118, no. 7, American Chemical Society, 2018, pp. 3559–607, doi:10.1021/acs.chemrev.7b00570.' short: C. Chipot, F. Dehez, J.R. Schnell, N. Zitzmann, E. Pebay-Peyroula, L.J. Catoire, B. Miroux, E.R.S. Kunji, G. Veglia, T.A. Cross, P. Schanda, Chemical Reviews 118 (2018) 3559–3607. date_created: 2020-09-18T10:05:35Z date_published: 2018-02-28T00:00:00Z date_updated: 2021-01-12T08:19:18Z day: '28' doi: 10.1021/acs.chemrev.7b00570 extern: '1' intvolume: ' 118' issue: '7' keyword: - General Chemistry language: - iso: eng month: '02' oa_version: None page: 3559-3607 publication: Chemical Reviews publication_identifier: issn: - 0009-2665 - 1520-6890 publication_status: published publisher: American Chemical Society quality_controlled: '1' status: public title: 'Perturbations of native membrane protein structure in alkyl phosphocholine detergents: A critical assessment of NMR and biophysical studies' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 118 year: '2018' ... --- _id: '8441' abstract: - lang: eng text: Solid-state near-rotary-resonance measurements of the spin–lattice relaxation rate in the rotating frame (R1ρ) is a powerful NMR technique for studying molecular dynamics in the microsecond time scale. The small difference between the spin-lock (SL) and magic-angle-spinning (MAS) frequencies allows sampling very slow motions, at the same time it brings up some methodological challenges. In this work, several issues affecting correct measurements and analysis of 15N R1ρ data are considered in detail. Among them are signal amplitude as a function of the difference between SL and MAS frequencies, “dead time” in the initial part of the relaxation decay caused by transient spin-dynamic oscillations, measurements under HORROR condition and proper treatment of the multi-exponential relaxation decays. The multiple 15N R1ρ measurements at different SL fields and temperatures have been conducted in 1D mode (i.e. without site-specific resolution) for a set of four different microcrystalline protein samples (GB1, SH3, MPD-ubiquitin and cubic-PEG-ubiquitin) to study the overall protein rocking in a crystal. While the amplitude of this motion varies very significantly, its correlation time for all four sample is practically the same, 30–50 μs. The amplitude of the rocking motion correlates with the packing density of a protein crystal. It has been suggested that the rocking motion is not diffusive but likely a jump-like dynamic process. article_processing_charge: No article_type: original author: - first_name: Alexey full_name: Krushelnitsky, Alexey last_name: Krushelnitsky - first_name: Diego full_name: Gauto, Diego last_name: Gauto - first_name: Diana C. full_name: Rodriguez Camargo, Diana C. last_name: Rodriguez Camargo - first_name: Paul full_name: Schanda, Paul id: 7B541462-FAF6-11E9-A490-E8DFE5697425 last_name: Schanda orcid: 0000-0002-9350-7606 - first_name: Kay full_name: Saalwächter, Kay last_name: Saalwächter citation: ama: 'Krushelnitsky A, Gauto D, Rodriguez Camargo DC, Schanda P, Saalwächter K. Microsecond motions probed by near-rotary-resonance R1ρ 15N MAS NMR experiments: The model case of protein overall-rocking in crystals. Journal of Biomolecular NMR. 2018;71(1):53-67. doi:10.1007/s10858-018-0191-4' apa: 'Krushelnitsky, A., Gauto, D., Rodriguez Camargo, D. C., Schanda, P., & Saalwächter, K. (2018). Microsecond motions probed by near-rotary-resonance R1ρ 15N MAS NMR experiments: The model case of protein overall-rocking in crystals. Journal of Biomolecular NMR. Springer Nature. https://doi.org/10.1007/s10858-018-0191-4' chicago: 'Krushelnitsky, Alexey, Diego Gauto, Diana C. Rodriguez Camargo, Paul Schanda, and Kay Saalwächter. “Microsecond Motions Probed by Near-Rotary-Resonance R1ρ 15N MAS NMR Experiments: The Model Case of Protein Overall-Rocking in Crystals.” Journal of Biomolecular NMR. Springer Nature, 2018. https://doi.org/10.1007/s10858-018-0191-4.' ieee: 'A. Krushelnitsky, D. Gauto, D. C. Rodriguez Camargo, P. Schanda, and K. Saalwächter, “Microsecond motions probed by near-rotary-resonance R1ρ 15N MAS NMR experiments: The model case of protein overall-rocking in crystals,” Journal of Biomolecular NMR, vol. 71, no. 1. Springer Nature, pp. 53–67, 2018.' ista: 'Krushelnitsky A, Gauto D, Rodriguez Camargo DC, Schanda P, Saalwächter K. 2018. Microsecond motions probed by near-rotary-resonance R1ρ 15N MAS NMR experiments: The model case of protein overall-rocking in crystals. Journal of Biomolecular NMR. 71(1), 53–67.' mla: 'Krushelnitsky, Alexey, et al. “Microsecond Motions Probed by Near-Rotary-Resonance R1ρ 15N MAS NMR Experiments: The Model Case of Protein Overall-Rocking in Crystals.” Journal of Biomolecular NMR, vol. 71, no. 1, Springer Nature, 2018, pp. 53–67, doi:10.1007/s10858-018-0191-4.' short: A. Krushelnitsky, D. Gauto, D.C. Rodriguez Camargo, P. Schanda, K. Saalwächter, Journal of Biomolecular NMR 71 (2018) 53–67. date_created: 2020-09-18T10:05:28Z date_published: 2018-05-30T00:00:00Z date_updated: 2021-01-12T08:19:17Z day: '30' doi: 10.1007/s10858-018-0191-4 extern: '1' intvolume: ' 71' issue: '1' language: - iso: eng month: '05' oa_version: Published Version page: 53-67 publication: Journal of Biomolecular NMR publication_identifier: issn: - 0925-2738 - 1573-5001 publication_status: published publisher: Springer Nature quality_controlled: '1' status: public title: 'Microsecond motions probed by near-rotary-resonance R1ρ 15N MAS NMR experiments: The model case of protein overall-rocking in crystals' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 71 year: '2018' ... --- _id: '8439' abstract: - lang: eng text: Lipopolysaccharides (LPS) are complex glycolipids forming the outside layer of Gram-negative bacteria. Their hydrophobic and heterogeneous nature greatly hampers their structural study in an environment similar to the bacterial surface. We have studied LPS purified from E. coli and pathogenic P. aeruginosa with long O-antigen polysaccharides assembled in solution as vesicles or elongated micelles. Solid-state NMR with magic-angle spinning permitted the identification of NMR signals arising from regions with different flexibilities in the LPS, from the lipid components to the O-antigen polysaccharides. Atomic scale data on the LPS enabled the study of the interaction of gentamicin antibiotic bound to P. aeruginosa LPS, for which we could confirm that a specific oligosaccharide is involved in the antibiotic binding. The possibility to study LPS alone and bound to a ligand when it is assembled in membrane-like structures opens great prospects for the investigation of proteins and antibiotics that specifically target such an important molecule at the surface of Gram-negative bacteria. article_processing_charge: No article_type: original author: - first_name: Cedric full_name: Laguri, Cedric last_name: Laguri - first_name: Alba full_name: Silipo, Alba last_name: Silipo - first_name: Alessandra M. full_name: Martorana, Alessandra M. last_name: Martorana - first_name: Paul full_name: Schanda, Paul id: 7B541462-FAF6-11E9-A490-E8DFE5697425 last_name: Schanda orcid: 0000-0002-9350-7606 - first_name: Roberta full_name: Marchetti, Roberta last_name: Marchetti - first_name: Alessandra full_name: Polissi, Alessandra last_name: Polissi - first_name: Antonio full_name: Molinaro, Antonio last_name: Molinaro - first_name: Jean-Pierre full_name: Simorre, Jean-Pierre last_name: Simorre citation: ama: Laguri C, Silipo A, Martorana AM, et al. Solid state NMR studies of intact lipopolysaccharide endotoxin. ACS Chemical Biology. 2018;13(8):2106-2113. doi:10.1021/acschembio.8b00271 apa: Laguri, C., Silipo, A., Martorana, A. M., Schanda, P., Marchetti, R., Polissi, A., … Simorre, J.-P. (2018). Solid state NMR studies of intact lipopolysaccharide endotoxin. ACS Chemical Biology. American Chemical Society. https://doi.org/10.1021/acschembio.8b00271 chicago: Laguri, Cedric, Alba Silipo, Alessandra M. Martorana, Paul Schanda, Roberta Marchetti, Alessandra Polissi, Antonio Molinaro, and Jean-Pierre Simorre. “Solid State NMR Studies of Intact Lipopolysaccharide Endotoxin.” ACS Chemical Biology. American Chemical Society, 2018. https://doi.org/10.1021/acschembio.8b00271. ieee: C. Laguri et al., “Solid state NMR studies of intact lipopolysaccharide endotoxin,” ACS Chemical Biology, vol. 13, no. 8. American Chemical Society, pp. 2106–2113, 2018. ista: Laguri C, Silipo A, Martorana AM, Schanda P, Marchetti R, Polissi A, Molinaro A, Simorre J-P. 2018. Solid state NMR studies of intact lipopolysaccharide endotoxin. ACS Chemical Biology. 13(8), 2106–2113. mla: Laguri, Cedric, et al. “Solid State NMR Studies of Intact Lipopolysaccharide Endotoxin.” ACS Chemical Biology, vol. 13, no. 8, American Chemical Society, 2018, pp. 2106–13, doi:10.1021/acschembio.8b00271. short: C. Laguri, A. Silipo, A.M. Martorana, P. Schanda, R. Marchetti, A. Polissi, A. Molinaro, J.-P. Simorre, ACS Chemical Biology 13 (2018) 2106–2113. date_created: 2020-09-18T10:05:09Z date_published: 2018-07-02T00:00:00Z date_updated: 2021-01-12T08:19:16Z day: '02' doi: 10.1021/acschembio.8b00271 extern: '1' intvolume: ' 13' issue: '8' keyword: - Molecular Medicine - Biochemistry - General Medicine language: - iso: eng month: '07' oa_version: None page: 2106-2113 publication: ACS Chemical Biology publication_identifier: issn: - 1554-8929 - 1554-8937 publication_status: published publisher: American Chemical Society quality_controlled: '1' status: public title: Solid state NMR studies of intact lipopolysaccharide endotoxin type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 13 year: '2018' ...