--- _id: '9805' abstract: - lang: eng text: The spread of adaptive alleles is fundamental to evolution, and in theory, this process is well‐understood. However, only rarely can we follow this process—whether it originates from the spread of a new mutation, or by introgression from another population. In this issue of Molecular Ecology, Hanemaaijer et al. (2018) report on a 25‐year long study of the mosquitoes Anopheles gambiae (Figure 1) and Anopheles coluzzi in Mali, based on genotypes at 15 single‐nucleotide polymorphism (SNP). The species are usually reproductively isolated from each other, but in 2002 and 2006, bursts of hybridization were observed, when F1 hybrids became abundant. Alleles backcrossed from A. gambiae into A. coluzzi, but after the first event, these declined over the following years. In contrast, after 2006, an insecticide resistance allele that had established in A. gambiae spread into A. coluzzi, and rose to high frequency there, over 6 years (~75 generations). Whole genome sequences of 74 individuals showed that A. gambiae SNP from across the genome had become common in the A. coluzzi population, but that most of these were clustered in 34 genes around the resistance locus. A new set of SNP from 25 of these genes were assayed over time; over the 4 years since near‐fixation of the resistance allele; some remained common, whereas others declined. What do these patterns tell us about this introgression event? article_processing_charge: No author: - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: 'Barton NH. Data from: The consequences of an introgression event. 2019. doi:10.5061/dryad.2kb6fh4' apa: 'Barton, N. H. (2019). Data from: The consequences of an introgression event. Dryad. https://doi.org/10.5061/dryad.2kb6fh4' chicago: 'Barton, Nicholas H. “Data from: The Consequences of an Introgression Event.” Dryad, 2019. https://doi.org/10.5061/dryad.2kb6fh4.' ieee: 'N. H. Barton, “Data from: The consequences of an introgression event.” Dryad, 2019.' ista: 'Barton NH. 2019. Data from: The consequences of an introgression event, Dryad, 10.5061/dryad.2kb6fh4.' mla: 'Barton, Nicholas H. Data from: The Consequences of an Introgression Event. Dryad, 2019, doi:10.5061/dryad.2kb6fh4.' short: N.H. Barton, (2019). date_created: 2021-08-06T12:03:50Z date_published: 2019-01-09T00:00:00Z date_updated: 2023-09-19T10:06:07Z day: '09' department: - _id: NiBa doi: 10.5061/dryad.2kb6fh4 main_file_link: - open_access: '1' url: https://doi.org/10.5061/dryad.2kb6fh4 month: '01' oa: 1 oa_version: Published Version publisher: Dryad related_material: record: - id: '40' relation: used_in_publication status: public status: public title: 'Data from: The consequences of an introgression event' type: research_data_reference user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf year: '2019' ... --- _id: '6071' abstract: - lang: eng text: 'Transcription factors, by binding to specific sequences on the DNA, control the precise spatio-temporal expression of genes inside a cell. However, this specificity is limited, leading to frequent incorrect binding of transcription factors that might have deleterious consequences on the cell. By constructing a biophysical model of TF-DNA binding in the context of gene regulation, I will first explore how regulatory constraints can strongly shape the distribution of a population in sequence space. Then, by directly linking this to a picture of multiple types of transcription factors performing their functions simultaneously inside the cell, I will explore the extent of regulatory crosstalk -- incorrect binding interactions between transcription factors and binding sites that lead to erroneous regulatory states -- and understand the constraints this places on the design of regulatory systems. I will then develop a generic theoretical framework to investigate the coevolution of multiple transcription factors and multiple binding sites, in the context of a gene regulatory network that performs a certain function. As a particular tractable version of this problem, I will consider the evolution of two transcription factors when they transmit upstream signals to downstream target genes. Specifically, I will describe the evolutionary steady states and the evolutionary pathways involved, along with their timescales, of a system that initially undergoes a transcription factor duplication event. To connect this important theoretical model to the prominent biological event of transcription factor duplication giving rise to paralogous families, I will then describe a bioinformatics analysis of C2H2 Zn-finger transcription factors, a major family in humans, and focus on the patterns of evolution that paralogs have undergone in their various protein domains in the recent past. ' alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Roshan full_name: Prizak, Roshan id: 4456104E-F248-11E8-B48F-1D18A9856A87 last_name: Prizak citation: ama: Prizak R. Coevolution of transcription factors and their binding sites in sequence space. 2019. doi:10.15479/at:ista:th6071 apa: Prizak, R. (2019). Coevolution of transcription factors and their binding sites in sequence space. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:th6071 chicago: Prizak, Roshan. “Coevolution of Transcription Factors and Their Binding Sites in Sequence Space.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/at:ista:th6071. ieee: R. Prizak, “Coevolution of transcription factors and their binding sites in sequence space,” Institute of Science and Technology Austria, 2019. ista: Prizak R. 2019. Coevolution of transcription factors and their binding sites in sequence space. Institute of Science and Technology Austria. mla: Prizak, Roshan. Coevolution of Transcription Factors and Their Binding Sites in Sequence Space. Institute of Science and Technology Austria, 2019, doi:10.15479/at:ista:th6071. short: R. Prizak, Coevolution of Transcription Factors and Their Binding Sites in Sequence Space, Institute of Science and Technology Austria, 2019. date_created: 2019-03-06T16:16:10Z date_published: 2019-03-11T00:00:00Z date_updated: 2023-09-22T10:00:48Z day: '11' ddc: - '576' degree_awarded: PhD department: - _id: GaTk - _id: NiBa doi: 10.15479/at:ista:th6071 file: - access_level: open_access checksum: e60a72de35d270b31f1a23d50f224ec0 content_type: application/pdf creator: rprizak date_created: 2019-03-06T16:05:07Z date_updated: 2020-07-14T12:47:18Z file_id: '6072' file_name: Thesis_final_PDFA_RoshanPrizak.pdf file_size: 20995465 relation: main_file - access_level: closed checksum: 67c2630333d05ebafef5f018863a8465 content_type: application/zip creator: rprizak date_created: 2019-03-06T16:09:39Z date_updated: 2020-07-14T12:47:18Z file_id: '6073' file_name: thesis_v2_merge.zip file_size: 85705272 relation: source_file title: Latex files file_date_updated: 2020-07-14T12:47:18Z has_accepted_license: '1' language: - iso: eng month: '03' oa: 1 oa_version: Published Version page: '189' project: - _id: 254E9036-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P28844-B27 name: Biophysics of information processing in gene regulation publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '1358' relation: part_of_dissertation status: public - id: '955' relation: part_of_dissertation status: public status: public supervisor: - first_name: Gašper full_name: Tkačik, Gašper id: 3D494DCA-F248-11E8-B48F-1D18A9856A87 last_name: Tkačik orcid: 0000-0002-6699-1455 title: Coevolution of transcription factors and their binding sites in sequence space type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6856' abstract: - lang: eng text: 'Plant mating systems play a key role in structuring genetic variation both within and between species. In hybrid zones, the outcomes and dynamics of hybridization are usually interpreted as the balance between gene flow and selection against hybrids. Yet, mating systems can introduce selective forces that alter these expectations; with diverse outcomes for the level and direction of gene flow depending on variation in outcrossing and whether the mating systems of the species pair are the same or divergent. We present a survey of hybridization in 133 species pairs from 41 plant families and examine how patterns of hybridization vary with mating system. We examine if hybrid zone mode, level of gene flow, asymmetries in gene flow and the frequency of reproductive isolating barriers vary in relation to mating system/s of the species pair. We combine these results with a simulation model and examples from the literature to address two general themes: (i) the two‐way interaction between introgression and the evolution of reproductive systems, and (ii) how mating system can facilitate or restrict interspecific gene flow. We conclude that examining mating system with hybridization provides unique opportunities to understand divergence and the processes underlying reproductive isolation.' article_processing_charge: No article_type: original author: - first_name: Melinda full_name: Pickup, Melinda id: 2C78037E-F248-11E8-B48F-1D18A9856A87 last_name: Pickup orcid: 0000-0001-6118-0541 - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 - first_name: Yaniv full_name: Brandvain, Yaniv last_name: Brandvain - first_name: Christelle full_name: Fraisse, Christelle id: 32DF5794-F248-11E8-B48F-1D18A9856A87 last_name: Fraisse orcid: 0000-0001-8441-5075 - first_name: Sarah full_name: Yakimowski, Sarah last_name: Yakimowski - first_name: Tanmay full_name: Dixit, Tanmay last_name: Dixit - first_name: Christian full_name: Lexer, Christian last_name: Lexer - first_name: Eva full_name: Cereghetti, Eva id: 71AA91B4-05ED-11EA-8BEB-F5833E63BD63 last_name: Cereghetti - first_name: David full_name: Field, David id: 419049E2-F248-11E8-B48F-1D18A9856A87 last_name: Field orcid: 0000-0002-4014-8478 citation: ama: 'Pickup M, Barton NH, Brandvain Y, et al. Mating system variation in hybrid zones: Facilitation, barriers and asymmetries to gene flow. New Phytologist. 2019;224(3):1035-1047. doi:10.1111/nph.16180' apa: 'Pickup, M., Barton, N. H., Brandvain, Y., Fraisse, C., Yakimowski, S., Dixit, T., … Field, D. (2019). Mating system variation in hybrid zones: Facilitation, barriers and asymmetries to gene flow. New Phytologist. Wiley. https://doi.org/10.1111/nph.16180' chicago: 'Pickup, Melinda, Nicholas H Barton, Yaniv Brandvain, Christelle Fraisse, Sarah Yakimowski, Tanmay Dixit, Christian Lexer, Eva Cereghetti, and David Field. “Mating System Variation in Hybrid Zones: Facilitation, Barriers and Asymmetries to Gene Flow.” New Phytologist. Wiley, 2019. https://doi.org/10.1111/nph.16180.' ieee: 'M. Pickup et al., “Mating system variation in hybrid zones: Facilitation, barriers and asymmetries to gene flow,” New Phytologist, vol. 224, no. 3. Wiley, pp. 1035–1047, 2019.' ista: 'Pickup M, Barton NH, Brandvain Y, Fraisse C, Yakimowski S, Dixit T, Lexer C, Cereghetti E, Field D. 2019. Mating system variation in hybrid zones: Facilitation, barriers and asymmetries to gene flow. New Phytologist. 224(3), 1035–1047.' mla: 'Pickup, Melinda, et al. “Mating System Variation in Hybrid Zones: Facilitation, Barriers and Asymmetries to Gene Flow.” New Phytologist, vol. 224, no. 3, Wiley, 2019, pp. 1035–47, doi:10.1111/nph.16180.' short: M. Pickup, N.H. Barton, Y. Brandvain, C. Fraisse, S. Yakimowski, T. Dixit, C. Lexer, E. Cereghetti, D. Field, New Phytologist 224 (2019) 1035–1047. date_created: 2019-09-07T14:35:40Z date_published: 2019-11-01T00:00:00Z date_updated: 2023-10-18T08:47:08Z day: '01' ddc: - '570' department: - _id: NiBa doi: 10.1111/nph.16180 ec_funded: 1 external_id: pmid: - '31505037' file: - access_level: open_access checksum: 21e4c95599bbcaf7c483b89954658672 content_type: application/pdf creator: dernst date_created: 2019-11-13T08:15:05Z date_updated: 2020-07-14T12:47:42Z file_id: '7011' file_name: 2019_NewPhytologist_Pickup.pdf file_size: 1511958 relation: main_file file_date_updated: 2020-07-14T12:47:42Z has_accepted_license: '1' intvolume: ' 224' issue: '3' language: - iso: eng month: '11' oa: 1 oa_version: Published Version page: 1035-1047 pmid: 1 project: - _id: 25B36484-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '329960' name: Mating system and the evolutionary dynamics of hybrid zones - _id: 2662AADE-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: M02463 name: Sex chromosomes and species barriers publication: New Phytologist publication_identifier: eissn: - 1469-8137 issn: - 0028-646X publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: 'Mating system variation in hybrid zones: Facilitation, barriers and asymmetries to gene flow' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 224 year: '2019' ... --- _id: '6089' abstract: - lang: eng text: Pleiotropy is the well-established idea that a single mutation affects multiple phenotypes. If a mutation has opposite effects on fitness when expressed in different contexts, then genetic conflict arises. Pleiotropic conflict is expected to reduce the efficacy of selection by limiting the fixation of beneficial mutations through adaptation, and the removal of deleterious mutations through purifying selection. Although this has been widely discussed, in particular in the context of a putative “gender load,” it has yet to be systematically quantified. In this work, we empirically estimate to which extent different pleiotropic regimes impede the efficacy of selection in Drosophila melanogaster. We use whole-genome polymorphism data from a single African population and divergence data from D. simulans to estimate the fraction of adaptive fixations (α), the rate of adaptation (ωA), and the direction of selection (DoS). After controlling for confounding covariates, we find that the different pleiotropic regimes have a relatively small, but significant, effect on selection efficacy. Specifically, our results suggest that pleiotropic sexual antagonism may restrict the efficacy of selection, but that this conflict can be resolved by limiting the expression of genes to the sex where they are beneficial. Intermediate levels of pleiotropy across tissues and life stages can also lead to maladaptation in D. melanogaster, due to inefficient purifying selection combined with low frequency of mutations that confer a selective advantage. Thus, our study highlights the need to consider the efficacy of selection in the context of antagonistic pleiotropy, and of genetic conflict in general. article_processing_charge: No author: - first_name: Christelle full_name: Fraisse, Christelle id: 32DF5794-F248-11E8-B48F-1D18A9856A87 last_name: Fraisse orcid: 0000-0001-8441-5075 - first_name: Gemma full_name: Puixeu Sala, Gemma id: 33AB266C-F248-11E8-B48F-1D18A9856A87 last_name: Puixeu Sala orcid: 0000-0001-8330-1754 - first_name: Beatriz full_name: Vicoso, Beatriz id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87 last_name: Vicoso orcid: 0000-0002-4579-8306 citation: ama: Fraisse C, Puixeu Sala G, Vicoso B. Pleiotropy modulates the efficacy of selection in drosophila melanogaster. Molecular biology and evolution. 2019;36(3):500-515. doi:10.1093/molbev/msy246 apa: Fraisse, C., Puixeu Sala, G., & Vicoso, B. (2019). Pleiotropy modulates the efficacy of selection in drosophila melanogaster. Molecular Biology and Evolution. Oxford University Press. https://doi.org/10.1093/molbev/msy246 chicago: Fraisse, Christelle, Gemma Puixeu Sala, and Beatriz Vicoso. “Pleiotropy Modulates the Efficacy of Selection in Drosophila Melanogaster.” Molecular Biology and Evolution. Oxford University Press, 2019. https://doi.org/10.1093/molbev/msy246. ieee: C. Fraisse, G. Puixeu Sala, and B. Vicoso, “Pleiotropy modulates the efficacy of selection in drosophila melanogaster,” Molecular biology and evolution, vol. 36, no. 3. Oxford University Press, pp. 500–515, 2019. ista: Fraisse C, Puixeu Sala G, Vicoso B. 2019. Pleiotropy modulates the efficacy of selection in drosophila melanogaster. Molecular biology and evolution. 36(3), 500–515. mla: Fraisse, Christelle, et al. “Pleiotropy Modulates the Efficacy of Selection in Drosophila Melanogaster.” Molecular Biology and Evolution, vol. 36, no. 3, Oxford University Press, 2019, pp. 500–15, doi:10.1093/molbev/msy246. short: C. Fraisse, G. Puixeu Sala, B. Vicoso, Molecular Biology and Evolution 36 (2019) 500–515. date_created: 2019-03-10T22:59:19Z date_published: 2019-03-01T00:00:00Z date_updated: 2024-02-21T13:59:17Z day: '01' department: - _id: BeVi - _id: NiBa doi: 10.1093/molbev/msy246 external_id: isi: - '000462585100006' pmid: - '30590559' intvolume: ' 36' isi: 1 issue: '3' language: - iso: eng main_file_link: - open_access: '1' url: https://www.ncbi.nlm.nih.gov/pubmed/30590559 month: '03' oa: 1 oa_version: Submitted Version page: 500-515 pmid: 1 project: - _id: 250ED89C-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P28842-B22 name: Sex chromosome evolution under male- and female- heterogamety publication: Molecular biology and evolution publication_identifier: eissn: - 1537-1719 issn: - 0737-4038 publication_status: published publisher: Oxford University Press quality_controlled: '1' related_material: record: - id: '5757' relation: popular_science status: public scopus_import: '1' status: public title: Pleiotropy modulates the efficacy of selection in drosophila melanogaster type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 36 year: '2019' ... --- _id: '6090' abstract: - lang: eng text: Cells need to reliably sense external ligand concentrations to achieve various biological functions such as chemotaxis or signaling. The molecular recognition of ligands by surface receptors is degenerate in many systems, leading to crosstalk between ligand-receptor pairs. Crosstalk is often thought of as a deviation from optimal specific recognition, as the binding of noncognate ligands can interfere with the detection of the receptor's cognate ligand, possibly leading to a false triggering of a downstream signaling pathway. Here we quantify the optimal precision of sensing the concentrations of multiple ligands by a collection of promiscuous receptors. We demonstrate that crosstalk can improve precision in concentration sensing and discrimination tasks. To achieve superior precision, the additional information about ligand concentrations contained in short binding events of the noncognate ligand should be exploited. We present a proofreading scheme to realize an approximate estimation of multiple ligand concentrations that reaches a precision close to the derived optimal bounds. Our results help rationalize the observed ubiquity of receptor crosstalk in molecular sensing. article_number: '022423' article_processing_charge: No author: - first_name: Martín full_name: Carballo-Pacheco, Martín last_name: Carballo-Pacheco - first_name: Jonathan full_name: Desponds, Jonathan last_name: Desponds - first_name: Tatyana full_name: Gavrilchenko, Tatyana last_name: Gavrilchenko - first_name: Andreas full_name: Mayer, Andreas last_name: Mayer - first_name: Roshan full_name: Prizak, Roshan id: 4456104E-F248-11E8-B48F-1D18A9856A87 last_name: Prizak - first_name: Gautam full_name: Reddy, Gautam last_name: Reddy - first_name: Ilya full_name: Nemenman, Ilya last_name: Nemenman - first_name: Thierry full_name: Mora, Thierry last_name: Mora citation: ama: Carballo-Pacheco M, Desponds J, Gavrilchenko T, et al. Receptor crosstalk improves concentration sensing of multiple ligands. Physical Review E. 2019;99(2). doi:10.1103/PhysRevE.99.022423 apa: Carballo-Pacheco, M., Desponds, J., Gavrilchenko, T., Mayer, A., Prizak, R., Reddy, G., … Mora, T. (2019). Receptor crosstalk improves concentration sensing of multiple ligands. Physical Review E. American Physical Society. https://doi.org/10.1103/PhysRevE.99.022423 chicago: Carballo-Pacheco, Martín, Jonathan Desponds, Tatyana Gavrilchenko, Andreas Mayer, Roshan Prizak, Gautam Reddy, Ilya Nemenman, and Thierry Mora. “Receptor Crosstalk Improves Concentration Sensing of Multiple Ligands.” Physical Review E. American Physical Society, 2019. https://doi.org/10.1103/PhysRevE.99.022423. ieee: M. Carballo-Pacheco et al., “Receptor crosstalk improves concentration sensing of multiple ligands,” Physical Review E, vol. 99, no. 2. American Physical Society, 2019. ista: Carballo-Pacheco M, Desponds J, Gavrilchenko T, Mayer A, Prizak R, Reddy G, Nemenman I, Mora T. 2019. Receptor crosstalk improves concentration sensing of multiple ligands. Physical Review E. 99(2), 022423. mla: Carballo-Pacheco, Martín, et al. “Receptor Crosstalk Improves Concentration Sensing of Multiple Ligands.” Physical Review E, vol. 99, no. 2, 022423, American Physical Society, 2019, doi:10.1103/PhysRevE.99.022423. short: M. Carballo-Pacheco, J. Desponds, T. Gavrilchenko, A. Mayer, R. Prizak, G. Reddy, I. Nemenman, T. Mora, Physical Review E 99 (2019). date_created: 2019-03-10T22:59:20Z date_published: 2019-02-26T00:00:00Z date_updated: 2024-02-28T13:12:06Z day: '26' department: - _id: NiBa - _id: GaTk doi: 10.1103/PhysRevE.99.022423 external_id: isi: - '000459916500007' intvolume: ' 99' isi: 1 issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://www.biorxiv.org/content/10.1101/448118v1.abstract month: '02' oa: 1 oa_version: Preprint publication: Physical Review E publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Receptor crosstalk improves concentration sensing of multiple ligands type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 99 year: '2019' ...