5b4h
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of I86D mutant of phycocyanobilin:ferredoxin oxidoreductase in complex with biliverdin (data 1)== | |
| + | <StructureSection load='5b4h' size='340' side='right' caption='[[5b4h]], [[Resolution|resolution]] 1.11Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5b4h]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5B4H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5B4H FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BLA:BILIVERDINE+IX+ALPHA'>BLA</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5b4i|5b4i]], [[5b4j|5b4j]]</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Phycocyanobilin:ferredoxin_oxidoreductase Phycocyanobilin:ferredoxin oxidoreductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.3.7.5 1.3.7.5] </span></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5b4h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5b4h OCA], [http://pdbe.org/5b4h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5b4h RCSB], [http://www.ebi.ac.uk/pdbsum/5b4h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5b4h ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/PCYA_SYNY3 PCYA_SYNY3]] Catalyzes the four-electron reduction of biliverdin IX-alpha (2-electron reduction at both the A and D rings); the reaction proceeds via an isolatable 2-electron intermediate, 181,182-dihydrobiliverdin (By similarity). | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Phycocyanobilin:ferredoxin oxidoreductase (PcyA) catalyzes the reduction of biliverdin (BV) to produce phycocyanobilin, a linear tetrapyrrole pigment used for light harvesting and light sensing. Spectroscopic and HPLC analyses inidicate that BV bound to the I86D mutant of PcyA is fully protonated (BVH+ ) and can accept an electron, but I86D is unable to donate protons for the reduction; therefore, compared to the wild-type PcyA, the I86D mutant stabilizes BVH+ . To elucidate the structural basis of the I86D mutation, we determined the atomic-resolution structure of the I86D-BVH+ complex and the protonation states of the essential residues Asp105 and Glu76 in PcyA. Our study revealed that Asp105 adopted a fixed conformation in the I86D mutant, although it had dual conformations in wild-type PcyA which reflected the protonation states of BV. Taken together with biochemical/spectroscopic results, our analysis of the I86D-BVH+ structure supports the hypothesis that flexibility of Asp105 is essential for the catalytic activity of PcyA. | ||
| - | + | Atomic-resolution structure of the phycocyanobilin:ferredoxin oxidoreductase I86D mutant in complex with fully protonated biliverdin.,Hagiwara Y, Wada K, Irikawa T, Sato H, Unno M, Yamamoto K, Fukuyama K, Sugishima M FEBS Lett. 2016 Oct;590(19):3425-3434. doi: 10.1002/1873-3468.12387. Epub 2016, Sep 18. PMID:27596987<ref>PMID:27596987</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 5b4h" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Phycocyanobilin:ferredoxin oxidoreductase]] | ||
| + | [[Category: Fukuyama, K]] | ||
| + | [[Category: Hagiwara, Y]] | ||
[[Category: Irikawa, T]] | [[Category: Irikawa, T]] | ||
| + | [[Category: Sugishima, M]] | ||
[[Category: Unno, M]] | [[Category: Unno, M]] | ||
| - | [[Category: Hagiwara, Y]] | ||
[[Category: Wada, K]] | [[Category: Wada, K]] | ||
| - | [[Category: | + | [[Category: Heme metabolism]] |
| - | [[Category: | + | [[Category: Oxidoreductase]] |
| + | [[Category: Photosynthesis pigment]] | ||
Revision as of 21:10, 15 March 2017
Crystal structure of I86D mutant of phycocyanobilin:ferredoxin oxidoreductase in complex with biliverdin (data 1)
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