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==Refined solution structure of a cyanobacterial phytochrome GAF domain in the red light-absorbing ground state== | ==Refined solution structure of a cyanobacterial phytochrome GAF domain in the red light-absorbing ground state== | ||
<StructureSection load='2koi' size='340' side='right' caption='[[2koi | <StructureSection load='2koi' size='340' side='right'caption='[[2koi]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2koi]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[2koi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechococcus_sp._JA-2-3B'a(2-13) Synechococcus sp. JA-2-3B'a(2-13)]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KOI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KOI FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYC:PHYCOCYANOBILIN'>CYC</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2koi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2koi OCA], [https://pdbe.org/2koi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2koi RCSB], [https://www.ebi.ac.uk/pdbsum/2koi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2koi ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q2JIZ5_SYNJB Q2JIZ5_SYNJB] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ko/2koi_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ko/2koi_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
| Line 32: | Line 33: | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Cornilescu CC]] | |||
[[Category: Cornilescu G]] | |||
[[Category: Cornilescu | [[Category: Markley JL]] | ||
[[Category: Cornilescu | [[Category: Ulijasz AT]] | ||
[[Category: Markley | [[Category: Vierstra RD]] | ||
[[Category: Ulijasz | |||
[[Category: Vierstra | |||
Latest revision as of 12:15, 6 November 2024
Refined solution structure of a cyanobacterial phytochrome GAF domain in the red light-absorbing ground stateRefined solution structure of a cyanobacterial phytochrome GAF domain in the red light-absorbing ground state
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedPhytochromes are a collection of bilin-containing photoreceptors that regulate numerous photoresponses in plants and microorganisms through their ability to photointerconvert between a red-light-absorbing, ground state (Pr) and a far-red-light-absorbing, photoactivated state (Pfr). Although the structures of several phytochromes as Pr have been determined, little is known about the structure of Pfr and how it initiates signalling. Here we describe the three-dimensional solution structure of the bilin-binding domain as Pfr, using the cyanobacterial phytochrome from Synechococcus OSB'. Contrary to predictions, light-induced rotation of the A pyrrole ring but not the D ring is the primary motion of the chromophore during photoconversion. Subsequent rearrangements within the protein then affect intradomain and interdomain contact sites within the phytochrome dimer. On the basis of our models, we propose that phytochromes act by propagating reversible light-driven conformational changes in the bilin to altered contacts between the adjacent output domains, which in most phytochromes direct differential phosphotransfer. Structural basis for the photoconversion of a phytochrome to the activated Pfr form.,Ulijasz AT, Cornilescu G, Cornilescu CC, Zhang J, Rivera M, Markley JL, Vierstra RD Nature. 2010 Jan 14;463(7278):250-4. PMID:20075921[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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