--- _id: '2990' abstract: - lang: eng text: Plant growth is marked by its adaptability to continuous changes in environment. A regulated, differential distribution of auxin underlies many adaptation processes including organogenesis, meristem patterning and tropisms. In executing its multiple roles, auxin displays some characteristics of both a hormone and a morphogen. Studies on auxin transport, as well as tracing the intracellular movement of its molecular components, have suggested a possible scenario to explain how growth plasticity is conferred at the cellular and molecular level. The plant perceives stimuli and changes the subcellular position of auxin-transport components accordingly. These changes modulate auxin fluxes, and the newly established auxin distribution triggers the corresponding developmental response. author: - first_name: Jirí full_name: Friml, Jirí id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Friml J. Auxin transport - Shaping the plant. Current Opinion in Plant Biology. 2003;6(1):7-12. doi:10.1016/S1369526602000031 apa: Friml, J. (2003). Auxin transport - Shaping the plant. Current Opinion in Plant Biology. Elsevier. https://doi.org/10.1016/S1369526602000031 chicago: Friml, Jiří. “Auxin Transport - Shaping the Plant.” Current Opinion in Plant Biology. Elsevier, 2003. https://doi.org/10.1016/S1369526602000031. ieee: J. Friml, “Auxin transport - Shaping the plant,” Current Opinion in Plant Biology, vol. 6, no. 1. Elsevier, pp. 7–12, 2003. ista: Friml J. 2003. Auxin transport - Shaping the plant. Current Opinion in Plant Biology. 6(1), 7–12. mla: Friml, Jiří. “Auxin Transport - Shaping the Plant.” Current Opinion in Plant Biology, vol. 6, no. 1, Elsevier, 2003, pp. 7–12, doi:10.1016/S1369526602000031. short: J. Friml, Current Opinion in Plant Biology 6 (2003) 7–12. date_created: 2018-12-11T12:00:43Z date_published: 2003-02-01T00:00:00Z date_updated: 2021-01-12T07:40:17Z day: '01' doi: 10.1016/S1369526602000031 extern: '1' intvolume: ' 6' issue: '1' language: - iso: eng month: '02' oa_version: None page: 7 - 12 publication: Current Opinion in Plant Biology publication_status: published publisher: Elsevier publist_id: '3711' quality_controlled: '1' status: public title: Auxin transport - Shaping the plant type: journal_article user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 6 year: '2003' ... --- _id: '2992' abstract: - lang: eng text: Plants have many polarized cell types, but relatively little is known about the mechanisms that establish polarity. The orc mutant was identified originally by defects in root patterning, and positional cloning revealed that the affected gene encodes STEROL METHYLTRANSFERASE1, which is required for the appropriate synthesis and composition of major membrane sterols. smt1orc mutants displayed several conspicuous cell polarity defects. Columella root cap cells revealed perturbed polar positioning of different organelles, and in the smt1orc root epidermis, polar initiation of root hairs was more randomized. Polar auxin transport and expression of the auxin reporter DR5-β-glucuronidase were aberrant in smt1orc. Patterning defects in smt1orc resembled those observed in mutants of the PIN gene family of putative auxin efflux transporters. Consistently, the membrane localization of the PIN1 and PIN3 proteins was disturbed in smt1orc, whereas polar positioning of the influx carrier AUX1 appeared normal. Our results suggest that balanced sterol composition is a major requirement for cell polarity and auxin efflux in Arabidopsis. author: - first_name: Viola full_name: Willemsen, Viola last_name: Willemsen - first_name: Jirí full_name: Jirí Friml id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 - first_name: Markus full_name: Grebe, Markus last_name: Grebe - first_name: Albert full_name: Van Den Toorn, Albert last_name: Van Den Toorn - first_name: Klaus full_name: Palme, Klaus last_name: Palme - first_name: Ben full_name: Scheres, Ben last_name: Scheres citation: ama: Willemsen V, Friml J, Grebe M, Van Den Toorn A, Palme K, Scheres B. Cell polarity and PIN protein positioning in Arabidopsis require STEROL METHYLTRANSFERASE1 function. Plant Cell. 2003;15(3):612-625. doi:10.1105/tpc.008433 apa: Willemsen, V., Friml, J., Grebe, M., Van Den Toorn, A., Palme, K., & Scheres, B. (2003). Cell polarity and PIN protein positioning in Arabidopsis require STEROL METHYLTRANSFERASE1 function. Plant Cell. American Society of Plant Biologists. https://doi.org/10.1105/tpc.008433 chicago: Willemsen, Viola, Jiří Friml, Markus Grebe, Albert Van Den Toorn, Klaus Palme, and Ben Scheres. “Cell Polarity and PIN Protein Positioning in Arabidopsis Require STEROL METHYLTRANSFERASE1 Function.” Plant Cell. American Society of Plant Biologists, 2003. https://doi.org/10.1105/tpc.008433. ieee: V. Willemsen, J. Friml, M. Grebe, A. Van Den Toorn, K. Palme, and B. Scheres, “Cell polarity and PIN protein positioning in Arabidopsis require STEROL METHYLTRANSFERASE1 function,” Plant Cell, vol. 15, no. 3. American Society of Plant Biologists, pp. 612–625, 2003. ista: Willemsen V, Friml J, Grebe M, Van Den Toorn A, Palme K, Scheres B. 2003. Cell polarity and PIN protein positioning in Arabidopsis require STEROL METHYLTRANSFERASE1 function. Plant Cell. 15(3), 612–625. mla: Willemsen, Viola, et al. “Cell Polarity and PIN Protein Positioning in Arabidopsis Require STEROL METHYLTRANSFERASE1 Function.” Plant Cell, vol. 15, no. 3, American Society of Plant Biologists, 2003, pp. 612–25, doi:10.1105/tpc.008433. short: V. Willemsen, J. Friml, M. Grebe, A. Van Den Toorn, K. Palme, B. Scheres, Plant Cell 15 (2003) 612–625. date_created: 2018-12-11T12:00:44Z date_published: 2003-03-01T00:00:00Z date_updated: 2021-01-12T07:40:18Z day: '01' doi: 10.1105/tpc.008433 extern: 1 intvolume: ' 15' issue: '3' month: '03' page: 612 - 625 publication: Plant Cell publication_status: published publisher: American Society of Plant Biologists publist_id: '3710' quality_controlled: 0 status: public title: Cell polarity and PIN protein positioning in Arabidopsis require STEROL METHYLTRANSFERASE1 function type: journal_article volume: 15 year: '2003' ... --- _id: '2996' abstract: - lang: eng text: | Plants, compared to animals, exhibit an amazing adaptability and plasticity in their development. This is largely dependent on the ability of plants to form new organs, such as lateral roots, leaves, and flowers during postembryonic development. Organ primordia develop from founder cell populations into organs by coordinated cell division and differentiation. Here, we show that organ formation in Arabidopsis involves dynamic gradients of the signaling molecule auxin with maxima at the primordia tips. These gradients are mediated by cellular efflux requiring asymmetrically localized PIN proteins, which represent a functionally redundant network for auxin distribution in both aerial and underground organs. PIN1 polar localization undergoes a dynamic rearrangement, which correlates with establishment of auxin gradients and primordium development. Our results suggest that PIN-dependent, local auxin gradients represent a common module for formation of all plant organs, regardless of their mature morphology or developmental origin. author: - first_name: Eva full_name: Eva Benková id: 38F4F166-F248-11E8-B48F-1D18A9856A87 last_name: Benková orcid: 0000-0002-8510-9739 - first_name: Marta full_name: Michniewicz, Marta last_name: Michniewicz - first_name: Michael full_name: Sauer, Michael last_name: Sauer - first_name: Thomas full_name: Teichmann, Thomas last_name: Teichmann - first_name: Daniela full_name: Seifertová, Daniela last_name: Seifertová - first_name: Gerd full_name: Jürgens, Gerd last_name: Jürgens - first_name: Jirí full_name: Jirí Friml id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Benková E, Michniewicz M, Sauer M, et al. Local, efflux-dependent auxin gradients as a common module for plant organ formation. Cell. 2003;115(5):591-602. doi:10.1016/S0092-8674(03)00924-3 apa: Benková, E., Michniewicz, M., Sauer, M., Teichmann, T., Seifertová, D., Jürgens, G., & Friml, J. (2003). Local, efflux-dependent auxin gradients as a common module for plant organ formation. Cell. Cell Press. https://doi.org/10.1016/S0092-8674(03)00924-3 chicago: Benková, Eva, Marta Michniewicz, Michael Sauer, Thomas Teichmann, Daniela Seifertová, Gerd Jürgens, and Jiří Friml. “Local, Efflux-Dependent Auxin Gradients as a Common Module for Plant Organ Formation.” Cell. Cell Press, 2003. https://doi.org/10.1016/S0092-8674(03)00924-3. ieee: E. Benková et al., “Local, efflux-dependent auxin gradients as a common module for plant organ formation,” Cell, vol. 115, no. 5. Cell Press, pp. 591–602, 2003. ista: Benková E, Michniewicz M, Sauer M, Teichmann T, Seifertová D, Jürgens G, Friml J. 2003. Local, efflux-dependent auxin gradients as a common module for plant organ formation. Cell. 115(5), 591–602. mla: Benková, Eva, et al. “Local, Efflux-Dependent Auxin Gradients as a Common Module for Plant Organ Formation.” Cell, vol. 115, no. 5, Cell Press, 2003, pp. 591–602, doi:10.1016/S0092-8674(03)00924-3. short: E. Benková, M. Michniewicz, M. Sauer, T. Teichmann, D. Seifertová, G. Jürgens, J. Friml, Cell 115 (2003) 591–602. date_created: 2018-12-11T12:00:46Z date_published: 2003-11-26T00:00:00Z date_updated: 2021-01-12T07:40:19Z day: '26' doi: 10.1016/S0092-8674(03)00924-3 extern: 1 intvolume: ' 115' issue: '5' month: '11' page: 591 - 602 publication: Cell publication_status: published publisher: Cell Press publist_id: '3706' quality_controlled: 0 status: public title: Local, efflux-dependent auxin gradients as a common module for plant organ formation type: journal_article volume: 115 year: '2003' ... --- _id: '2995' abstract: - lang: eng text: | Axis formation occurs in plants, as in animals, during early embryogenesis. However, the underlying mechanism is not known. Here we show that the first manifestation of the apical-basal axis in plants, the asymmetric division of the zygote, produces a basal cell that transports and an apical cell that responds to the signalling molecule auxin. This apical-basal auxin activity gradient triggers the specification of apical embryo structures and is actively maintained by a novel component of auxin efflux, PIN7, which is located apically in the basal cell. Later, the developmentally regulated reversal of PIN7 and onset of PIN1 polar localization reorganize the auxin gradient for specification of the basal root pole. An analysis of pin quadruple mutants identifies PIN-dependent transport as an essential part of the mechanism for embryo axis formation. Our results indicate how the establishment of cell polarity, polar auxin efflux and local auxin response result in apical-basal axis formation of the embryo, and thus determine the axiality of the adult plant. author: - first_name: Jirí full_name: Jirí Friml id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 - first_name: Anne full_name: Vieten, Anne last_name: Vieten - first_name: Michael full_name: Sauer, Michael last_name: Sauer - first_name: Dolf full_name: Weijers, Dolf last_name: Weijers - first_name: Heinz full_name: Schwarz, Heinz last_name: Schwarz - first_name: Thorsten full_name: Hamann, Thorsten last_name: Hamann - first_name: Remko full_name: Offringa, Remko last_name: Offringa - first_name: Gerd full_name: Jürgens, Gerd last_name: Jürgens citation: ama: Friml J, Vieten A, Sauer M, et al. Efflux dependent auxin gradients establish the apical basal axis of Arabidopsis. Nature. 2003;426(6963):147-153. doi:10.1038/nature02085 apa: Friml, J., Vieten, A., Sauer, M., Weijers, D., Schwarz, H., Hamann, T., … Jürgens, G. (2003). Efflux dependent auxin gradients establish the apical basal axis of Arabidopsis. Nature. Nature Publishing Group. https://doi.org/10.1038/nature02085 chicago: Friml, Jiří, Anne Vieten, Michael Sauer, Dolf Weijers, Heinz Schwarz, Thorsten Hamann, Remko Offringa, and Gerd Jürgens. “Efflux Dependent Auxin Gradients Establish the Apical Basal Axis of Arabidopsis.” Nature. Nature Publishing Group, 2003. https://doi.org/10.1038/nature02085. ieee: J. Friml et al., “Efflux dependent auxin gradients establish the apical basal axis of Arabidopsis,” Nature, vol. 426, no. 6963. Nature Publishing Group, pp. 147–153, 2003. ista: Friml J, Vieten A, Sauer M, Weijers D, Schwarz H, Hamann T, Offringa R, Jürgens G. 2003. Efflux dependent auxin gradients establish the apical basal axis of Arabidopsis. Nature. 426(6963), 147–153. mla: Friml, Jiří, et al. “Efflux Dependent Auxin Gradients Establish the Apical Basal Axis of Arabidopsis.” Nature, vol. 426, no. 6963, Nature Publishing Group, 2003, pp. 147–53, doi:10.1038/nature02085. short: J. Friml, A. Vieten, M. Sauer, D. Weijers, H. Schwarz, T. Hamann, R. Offringa, G. Jürgens, Nature 426 (2003) 147–153. date_created: 2018-12-11T12:00:45Z date_published: 2003-11-13T00:00:00Z date_updated: 2021-01-12T07:40:19Z day: '13' doi: 10.1038/nature02085 extern: 1 intvolume: ' 426' issue: '6963' month: '11' page: 147 - 153 publication: Nature publication_status: published publisher: Nature Publishing Group publist_id: '3708' quality_controlled: 0 status: public title: Efflux dependent auxin gradients establish the apical basal axis of Arabidopsis type: journal_article volume: 426 year: '2003' ... --- _id: '2994' abstract: - lang: eng text: The regular arrangement of leaves around a plant's stem, called phyllotaxis, has for centuries attracted the attention of philosophers, mathematicians and natural scientists; however, to date, studies of phyllotaxis have been largely theoretical. Leaves and flowers are formed from the shoot apical meristem, triggered by the plant hormone auxin. Auxin is transported through plant tissues by specific cellular influx and efflux carrier proteins. Here we show that proteins involved in auxin transport regulate phyllotaxis. Our data indicate that auxin is transported upwards into the meristem through the epidermis and the outermost meristem cell layer. Existing leaf primordia act as sinks, redistributing auxin and creating its heterogeneous distribution in the meristem. Auxin accumulation occurs only at certain minimal distances from existing primordia, defining the position of future primordia. This model for phyllotaxis accounts for its reiterative nature, as well as its regularity and stability. author: - first_name: Didier full_name: Reinhardt, Didier last_name: Reinhardt - first_name: Eva full_name: Pesce, Eva-Rachele last_name: Pesce - first_name: Pia full_name: Stieger, Pia last_name: Stieger - first_name: Therese full_name: Mandel, Therese last_name: Mandel - first_name: Kurt full_name: Baltensperger, Kurt last_name: Baltensperger - first_name: Malcolm full_name: Bennett, Malcolm last_name: Bennett - first_name: Jan full_name: Traas, Jan last_name: Traas - first_name: Jirí full_name: Jirí Friml id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 - first_name: Cris full_name: Kuhlemeier, Cris last_name: Kuhlemeier citation: ama: Reinhardt D, Pesce E, Stieger P, et al. Regulation of phyllotaxis by polar auxin transport. Nature. 2003;426(6964):255-260. doi:10.1038/nature02081 apa: Reinhardt, D., Pesce, E., Stieger, P., Mandel, T., Baltensperger, K., Bennett, M., … Kuhlemeier, C. (2003). Regulation of phyllotaxis by polar auxin transport. Nature. Nature Publishing Group. https://doi.org/10.1038/nature02081 chicago: Reinhardt, Didier, Eva Pesce, Pia Stieger, Therese Mandel, Kurt Baltensperger, Malcolm Bennett, Jan Traas, Jiří Friml, and Cris Kuhlemeier. “Regulation of Phyllotaxis by Polar Auxin Transport.” Nature. Nature Publishing Group, 2003. https://doi.org/10.1038/nature02081. ieee: D. Reinhardt et al., “Regulation of phyllotaxis by polar auxin transport,” Nature, vol. 426, no. 6964. Nature Publishing Group, pp. 255–260, 2003. ista: Reinhardt D, Pesce E, Stieger P, Mandel T, Baltensperger K, Bennett M, Traas J, Friml J, Kuhlemeier C. 2003. Regulation of phyllotaxis by polar auxin transport. Nature. 426(6964), 255–260. mla: Reinhardt, Didier, et al. “Regulation of Phyllotaxis by Polar Auxin Transport.” Nature, vol. 426, no. 6964, Nature Publishing Group, 2003, pp. 255–60, doi:10.1038/nature02081. short: D. Reinhardt, E. Pesce, P. Stieger, T. Mandel, K. Baltensperger, M. Bennett, J. Traas, J. Friml, C. Kuhlemeier, Nature 426 (2003) 255–260. date_created: 2018-12-11T12:00:45Z date_published: 2003-11-20T00:00:00Z date_updated: 2021-01-12T07:40:18Z day: '20' doi: 10.1038/nature02081 extern: 1 intvolume: ' 426' issue: '6964' month: '11' page: 255 - 260 publication: Nature publication_status: published publisher: Nature Publishing Group publist_id: '3707' quality_controlled: 0 status: public title: Regulation of phyllotaxis by polar auxin transport type: journal_article volume: 426 year: '2003' ... --- _id: '2993' abstract: - lang: eng text: Plant biology is currently experiencing a growing demand for easy and reliable mRNA and protein localisation techniques. Here, we present novel whole mount in situ hybridisation and immunolocalisation protocols, suitable to localise mRNAs and proteins in Arabidopsis seedlings. We demonstrate that these methods can be used in different organs of Arabidopsis seedlings as well as in other plant species. In order to achieve better reproducibility and higher throughput, we modified these protocols for automation to be performed by a liquid handling robot. In addition, we show that other procedures such as reporter enzyme assays and tissue clearing can be similarly automated. We present examples of application of our protocols including mRNA localisation and proteins and epitope tag (co)localisations which demonstrate that these methods provide reliable and versatile tools for expression, localisation and anatomical studies in plants. author: - first_name: Jirí full_name: Jirí Friml id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 - first_name: Eva full_name: Eva Benková id: 38F4F166-F248-11E8-B48F-1D18A9856A87 last_name: Benková orcid: 0000-0002-8510-9739 - first_name: Ulrike full_name: Mayer, Ulrike last_name: Mayer - first_name: Klaus full_name: Palme, Klaus last_name: Palme - first_name: Gerhard full_name: Muster, Gerhard last_name: Muster citation: ama: Friml J, Benková E, Mayer U, Palme K, Muster G. Automated whole mount localisation techniques for plant seedlings. Plant Journal. 2003;34(1):115-124. doi:10.1046/j.1365-313X.2003.01705.x apa: Friml, J., Benková, E., Mayer, U., Palme, K., & Muster, G. (2003). Automated whole mount localisation techniques for plant seedlings. Plant Journal. Wiley-Blackwell. https://doi.org/10.1046/j.1365-313X.2003.01705.x chicago: Friml, Jiří, Eva Benková, Ulrike Mayer, Klaus Palme, and Gerhard Muster. “Automated Whole Mount Localisation Techniques for Plant Seedlings.” Plant Journal. Wiley-Blackwell, 2003. https://doi.org/10.1046/j.1365-313X.2003.01705.x. ieee: J. Friml, E. Benková, U. Mayer, K. Palme, and G. Muster, “Automated whole mount localisation techniques for plant seedlings,” Plant Journal, vol. 34, no. 1. Wiley-Blackwell, pp. 115–124, 2003. ista: Friml J, Benková E, Mayer U, Palme K, Muster G. 2003. Automated whole mount localisation techniques for plant seedlings. Plant Journal. 34(1), 115–124. mla: Friml, Jiří, et al. “Automated Whole Mount Localisation Techniques for Plant Seedlings.” Plant Journal, vol. 34, no. 1, Wiley-Blackwell, 2003, pp. 115–24, doi:10.1046/j.1365-313X.2003.01705.x. short: J. Friml, E. Benková, U. Mayer, K. Palme, G. Muster, Plant Journal 34 (2003) 115–124. date_created: 2018-12-11T12:00:44Z date_published: 2003-04-01T00:00:00Z date_updated: 2021-01-12T07:40:18Z day: '01' doi: 10.1046/j.1365-313X.2003.01705.x extern: 1 intvolume: ' 34' issue: '1' month: '04' page: 115 - 124 publication: Plant Journal publication_status: published publisher: Wiley-Blackwell publist_id: '3709' quality_controlled: 0 status: public title: Automated whole mount localisation techniques for plant seedlings type: journal_article volume: 34 year: '2003' ... --- _id: '3151' abstract: - lang: eng text: Biosynthesis of most peptide hormones and neuropeptides requires proteolytic excision of the active peptide from inactive proprotein precursors, an activity carried out by subtilisin-like proprotein convertases (SPCs) in constitutive or regulated secretory pathways. The Drosophila amontillado (amon) gene encodes a homolog of the mammalian PC2 protein, an SPC that functions in the regulated secretory pathway in neuroendocrine tissues. We have identified amon mutants by isolating ethylmethanesulfonate (EMS)-induced lethal and visible mutations that define two complementation groups in the amon interval at 97D1 of the third chromosome. DNA sequencing identified the amon complementation group and the DNA sequence change for each of the nine amon alleles isolated. amon mutants display partial embryonic lethality, are defective in larval growth, and arrest during the first to second instar larval molt. Mutant larvae can be rescued by heat-shock-induced expression of the amon protein. Rescued larvae arrest at the subsequent larval molt, suggesting that amon is also required for the second to third instar larval molt. Our data indicate that the amon proprotein convertase is required during embryogenesis and larval development in Drosophila and support the hypothesis that AMON acts to proteolytically process peptide hormones that regulate hatching, larval growth, and larval ecdysis. author: - first_name: Lowell full_name: Rayburn, Lowell Y last_name: Rayburn - first_name: Holly full_name: Gooding, Holly C last_name: Gooding - first_name: Semil full_name: Choksi, Semil P last_name: Choksi - first_name: Dhea full_name: Maloney, Dhea last_name: Maloney - first_name: Ambrose full_name: Kidd, Ambrose R last_name: Kidd - first_name: Daria E full_name: Daria Siekhaus id: 3D224B9E-F248-11E8-B48F-1D18A9856A87 last_name: Siekhaus orcid: 0000-0001-8323-8353 - first_name: Michael full_name: Bender, Michael last_name: Bender citation: ama: Rayburn L, Gooding H, Choksi S, et al. Amontillado, the Drosophila homolog of the prohormone processing protease PC2, is required during embryogenesis and early larval development. Genetics. 2003;163(1):227-237. apa: Rayburn, L., Gooding, H., Choksi, S., Maloney, D., Kidd, A., Siekhaus, D. E., & Bender, M. (2003). Amontillado, the Drosophila homolog of the prohormone processing protease PC2, is required during embryogenesis and early larval development. Genetics. Genetics Society of America. chicago: Rayburn, Lowell, Holly Gooding, Semil Choksi, Dhea Maloney, Ambrose Kidd, Daria E Siekhaus, and Michael Bender. “Amontillado, the Drosophila Homolog of the Prohormone Processing Protease PC2, Is Required during Embryogenesis and Early Larval Development.” Genetics. Genetics Society of America, 2003. ieee: L. Rayburn et al., “Amontillado, the Drosophila homolog of the prohormone processing protease PC2, is required during embryogenesis and early larval development,” Genetics, vol. 163, no. 1. Genetics Society of America, pp. 227–237, 2003. ista: Rayburn L, Gooding H, Choksi S, Maloney D, Kidd A, Siekhaus DE, Bender M. 2003. Amontillado, the Drosophila homolog of the prohormone processing protease PC2, is required during embryogenesis and early larval development. Genetics. 163(1), 227–237. mla: Rayburn, Lowell, et al. “Amontillado, the Drosophila Homolog of the Prohormone Processing Protease PC2, Is Required during Embryogenesis and Early Larval Development.” Genetics, vol. 163, no. 1, Genetics Society of America, 2003, pp. 227–37. short: L. Rayburn, H. Gooding, S. Choksi, D. Maloney, A. Kidd, D.E. Siekhaus, M. Bender, Genetics 163 (2003) 227–237. date_created: 2018-12-11T12:01:41Z date_published: 2003-01-01T00:00:00Z date_updated: 2021-01-12T07:41:25Z day: '01' extern: 1 intvolume: ' 163' issue: '1' month: '01' page: 227 - 237 publication: Genetics publication_status: published publisher: Genetics Society of America publist_id: '3545' quality_controlled: 0 status: public title: Amontillado, the Drosophila homolog of the prohormone processing protease PC2, is required during embryogenesis and early larval development type: journal_article volume: 163 year: '2003' ... --- _id: '3150' abstract: - lang: eng text: Tripartite G-protein-coupled receptors (GPCRs) represent one of the largest groups of signal transducers, transmitting signals from hormones, neuropeptides, odorants, food and light. Ligand-bound receptors catalyse GDP/GTP exchange on the G-protein α-subunit (Gα), leading to α-GTP separation from the βγ subunits and pathway activation. Activating mutations in the receptors or G proteins underlie many human diseases, including some cancers, dwarfism and premature puberty. Regulators of G-protein signalling (RGS proteins) are known to modulate the level and duration of ligand-induced signalling by accelerating the intrinsic GTPase activity of the Gα subunit, and thus reformation of the inactive GDP-bound Gα. Here we find that even in the absence of receptor, mutation of the RGS family member Sst2 (refs 6-9) permits spontaneous activation of the G-protein-coupled mating pathway in Saccharomyces cerevisiae at levels normally seen only in the presence of ligand. Our work demonstrates the occurence of spontaneous tripartite G-protein signalling in vivo and identifies a requirement for RGS proteins in preventing such receptor-independent activation. author: - first_name: Daria E full_name: Daria Siekhaus id: 3D224B9E-F248-11E8-B48F-1D18A9856A87 last_name: Siekhaus orcid: 0000-0001-8323-8353 - first_name: David full_name: Drubin, David G last_name: Drubin citation: ama: Siekhaus DE, Drubin D. Spontaneous receptor-independent heterotrimeric G-protein signalling in an RGS mutant. Nature Cell Biology. 2003;5(3):231-235. doi:10.1038/ncb941 apa: Siekhaus, D. E., & Drubin, D. (2003). Spontaneous receptor-independent heterotrimeric G-protein signalling in an RGS mutant. Nature Cell Biology. Nature Publishing Group. https://doi.org/10.1038/ncb941 chicago: Siekhaus, Daria E, and David Drubin. “Spontaneous Receptor-Independent Heterotrimeric G-Protein Signalling in an RGS Mutant.” Nature Cell Biology. Nature Publishing Group, 2003. https://doi.org/10.1038/ncb941. ieee: D. E. Siekhaus and D. Drubin, “Spontaneous receptor-independent heterotrimeric G-protein signalling in an RGS mutant,” Nature Cell Biology, vol. 5, no. 3. Nature Publishing Group, pp. 231–235, 2003. ista: Siekhaus DE, Drubin D. 2003. Spontaneous receptor-independent heterotrimeric G-protein signalling in an RGS mutant. Nature Cell Biology. 5(3), 231–235. mla: Siekhaus, Daria E., and David Drubin. “Spontaneous Receptor-Independent Heterotrimeric G-Protein Signalling in an RGS Mutant.” Nature Cell Biology, vol. 5, no. 3, Nature Publishing Group, 2003, pp. 231–35, doi:10.1038/ncb941. short: D.E. Siekhaus, D. Drubin, Nature Cell Biology 5 (2003) 231–235. date_created: 2018-12-11T12:01:41Z date_published: 2003-03-01T00:00:00Z date_updated: 2021-01-12T07:41:24Z day: '01' doi: 10.1038/ncb941 extern: 1 intvolume: ' 5' issue: '3' month: '03' page: 231 - 235 publication: Nature Cell Biology publication_status: published publisher: Nature Publishing Group publist_id: '3544' quality_controlled: 0 status: public title: Spontaneous receptor-independent heterotrimeric G-protein signalling in an RGS mutant type: journal_article volume: 5 year: '2003' ... --- _id: '3209' abstract: - lang: eng text: We show that the fixed alphabet shortest common supersequence (SCS) and the fixed alphabet longest common subsequence (LCS) problems parameterized in the number of strings are W[1]-hard. Unless W[1]=FPT, this rules out the existence of algorithms with time complexity of O(f(k)nα) for those problems. Here n is the size of the problem instance, α is constant, k is the number of strings and f is any function of k. The fixed alphabet version of the LCS problem is of particular interest considering the importance of sequence comparison (e.g. multiple sequence alignment) in the fixed length alphabet world of DNA and protein sequences. author: - first_name: Krzysztof Z full_name: Krzysztof Pietrzak id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87 last_name: Pietrzak orcid: 0000-0002-9139-1654 citation: ama: Pietrzak KZ. On the parameterized complexity of the fixed alphabet shortest common supersequence and longest common subsequence problems. Journal of Computer and System Sciences. 2003;67(4):757-771. doi:10.1016/S0022-0000(03)00078-3 apa: Pietrzak, K. Z. (2003). On the parameterized complexity of the fixed alphabet shortest common supersequence and longest common subsequence problems. Journal of Computer and System Sciences. Elsevier. https://doi.org/10.1016/S0022-0000(03)00078-3 chicago: Pietrzak, Krzysztof Z. “On the Parameterized Complexity of the Fixed Alphabet Shortest Common Supersequence and Longest Common Subsequence Problems.” Journal of Computer and System Sciences. Elsevier, 2003. https://doi.org/10.1016/S0022-0000(03)00078-3. ieee: K. Z. Pietrzak, “On the parameterized complexity of the fixed alphabet shortest common supersequence and longest common subsequence problems,” Journal of Computer and System Sciences, vol. 67, no. 4. Elsevier, pp. 757–771, 2003. ista: Pietrzak KZ. 2003. On the parameterized complexity of the fixed alphabet shortest common supersequence and longest common subsequence problems. Journal of Computer and System Sciences. 67(4), 757–771. mla: Pietrzak, Krzysztof Z. “On the Parameterized Complexity of the Fixed Alphabet Shortest Common Supersequence and Longest Common Subsequence Problems.” Journal of Computer and System Sciences, vol. 67, no. 4, Elsevier, 2003, pp. 757–71, doi:10.1016/S0022-0000(03)00078-3. short: K.Z. Pietrzak, Journal of Computer and System Sciences 67 (2003) 757–771. date_created: 2018-12-11T12:02:01Z date_published: 2003-12-01T00:00:00Z date_updated: 2021-01-12T07:41:49Z day: '01' doi: 10.1016/S0022-0000(03)00078-3 extern: 1 intvolume: ' 67' issue: '4' month: '12' page: 757 - 771 publication: Journal of Computer and System Sciences publication_status: published publisher: Elsevier publist_id: '3472' quality_controlled: 0 status: public title: On the parameterized complexity of the fixed alphabet shortest common supersequence and longest common subsequence problems type: journal_article volume: 67 year: '2003' ... --- _id: '3210' abstract: - lang: eng text: 'Luby and Rackoff showed how to construct a (super-)pseudo-random permutation {0,1}2n→ {0,1}2n from some number r of pseudo-random functions {0,1}n → {0,1}n. Their construction, motivated by DES, consists of a cascade of r Feistel permutations. A Feistel permutation 1for a pseudo-random function f is defined as (L, R) → (R,L ⊕ f (R)), where L and R are the left and right part of the input and ⊕ denotes bitwise XOR or, in this paper, any other group operation on {0,1}n. The only non-trivial step of the security proof consists of proving that the cascade of r Feistel permutations with independent uniform random functions {0,1}n → {0,1}n, denoted Ψ2nr is indistinguishable from a uniform random permutation {0,1}2n → {0,1}2n by any computationally unbounded adaptive distinguisher making at most O(2cn) combined chosen plaintext/ciphertext queries for any c < α, where a is a security parameter. Luby and Rackoff proved α = 1/2 for r = 4. A natural problem, proposed by Pieprzyk is to improve on α for larger r. The best known result, α = 3/4 for r = 6, is due to Patarin. In this paper we prove a = 1 -O(1/r), i.e., the trivial upper bound α = 1 can be approached. The proof uses some new techniques that can be of independent interest. ' alternative_title: - LNCS author: - first_name: Ueli full_name: Maurer, Ueli M last_name: Maurer - first_name: Krzysztof Z full_name: Krzysztof Pietrzak id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87 last_name: Pietrzak orcid: 0000-0002-9139-1654 citation: ama: 'Maurer U, Pietrzak KZ. The security of many round Luby Rackoff pseudo random permutations. In: Vol 2656. Springer; 2003:544-561. doi:10.1007/3-540-39200-9_34' apa: 'Maurer, U., & Pietrzak, K. Z. (2003). The security of many round Luby Rackoff pseudo random permutations (Vol. 2656, pp. 544–561). Presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, Springer. https://doi.org/10.1007/3-540-39200-9_34' chicago: Maurer, Ueli, and Krzysztof Z Pietrzak. “The Security of Many Round Luby Rackoff Pseudo Random Permutations,” 2656:544–61. Springer, 2003. https://doi.org/10.1007/3-540-39200-9_34. ieee: 'U. Maurer and K. Z. Pietrzak, “The security of many round Luby Rackoff pseudo random permutations,” presented at the EUROCRYPT: Theory and Applications of Cryptographic Techniques, 2003, vol. 2656, pp. 544–561.' ista: 'Maurer U, Pietrzak KZ. 2003. The security of many round Luby Rackoff pseudo random permutations. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 2656, 544–561.' mla: Maurer, Ueli, and Krzysztof Z. Pietrzak. The Security of Many Round Luby Rackoff Pseudo Random Permutations. Vol. 2656, Springer, 2003, pp. 544–61, doi:10.1007/3-540-39200-9_34. short: U. Maurer, K.Z. Pietrzak, in:, Springer, 2003, pp. 544–561. conference: name: 'EUROCRYPT: Theory and Applications of Cryptographic Techniques' date_created: 2018-12-11T12:02:02Z date_published: 2003-06-04T00:00:00Z date_updated: 2021-01-12T07:41:49Z day: '04' doi: 10.1007/3-540-39200-9_34 extern: 1 intvolume: ' 2656' month: '06' page: 544 - 561 publication_status: published publisher: Springer publist_id: '3473' quality_controlled: 0 status: public title: The security of many round Luby Rackoff pseudo random permutations type: conference volume: 2656 year: '2003' ...