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6jql
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Structure of PaaZ, a bifunctional enzyme== | |
| + | <SX load='6jql' size='340' side='right' viewer='molstar' caption='[[6jql]], [[Resolution|resolution]] 2.90Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[6jql]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6JQL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6JQL FirstGlance]. <br> | ||
| + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">paaZ ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Oxepin-CoA_hydrolase Oxepin-CoA hydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.3.2.12 3.3.2.12] </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=6jql FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6jql OCA], [http://pdbe.org/6jql PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6jql RCSB], [http://www.ebi.ac.uk/pdbsum/6jql PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6jql ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/PAAZ_ECOLI PAAZ_ECOLI]] Catalyzes the hydrolytic ring cleavage of 2-oxepin-2(3H)-ylideneacetyl-CoA (oxepin-CoA) via the open-chain aldehyde intermediate to yield 3-oxo-5,6-dehydrosuberyl-CoA. The enzyme consists of a C-terminal (R)-specific enoyl-CoA hydratase domain (formerly MaoC) that cleaves the ring and produces the highly reactive 3-oxo-5,6-dehydrosuberyl-CoA semialdehyde and an N-terminal NADP-dependent aldehyde dehydrogenase domain that oxidizes the aldehyde to 3-oxo-5,6-dehydrosuberyl-CoA. Can also use crotonyl-CoA as substrate.<ref>PMID:20660314</ref> <ref>PMID:21296885</ref> <ref>PMID:9748275</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Substrate channeling is a mechanism for the internal transfer of hydrophobic, unstable or toxic intermediates from the active site of one enzyme to another. Such transfer has previously been described to be mediated by a hydrophobic tunnel, the use of electrostatic highways or pivoting and by conformational changes. The enzyme PaaZ is used by many bacteria to degrade environmental pollutants. PaaZ is a bifunctional enzyme that catalyzes the ring opening of oxepin-CoA and converts it to 3-oxo-5,6-dehydrosuberyl-CoA. Here we report the structures of PaaZ determined by electron cryomicroscopy with and without bound ligands. The structures reveal that three domain-swapped dimers of the enzyme form a trilobed structure. A combination of small-angle X-ray scattering (SAXS), computational studies, mutagenesis and microbial growth experiments suggests that the key intermediate is transferred from one active site to the other by a mechanism of electrostatic pivoting of the CoA moiety, mediated by a set of conserved positively charged residues. | ||
| - | + | Molecular basis for metabolite channeling in a ring opening enzyme of the phenylacetate degradation pathway.,Sathyanarayanan N, Cannone G, Gakhar L, Katagihallimath N, Sowdhamini R, Ramaswamy S, Vinothkumar KR Nat Commun. 2019 Sep 11;10(1):4127. doi: 10.1038/s41467-019-11931-1. PMID:31511507<ref>PMID:31511507</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 6jql" style="background-color:#fffaf0;"></div> |
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </SX> | ||
| + | [[Category: Ecoli]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Oxepin-CoA hydrolase]] | ||
[[Category: Cannone, G]] | [[Category: Cannone, G]] | ||
| + | [[Category: Gakher, L]] | ||
[[Category: Katagihallimath, N]] | [[Category: Katagihallimath, N]] | ||
| - | [[Category: Vinothkumar, K.R]] | ||
[[Category: Sathyanarayanan, N]] | [[Category: Sathyanarayanan, N]] | ||
[[Category: Sowdhamini, R]] | [[Category: Sowdhamini, R]] | ||
| - | [[Category: | + | [[Category: Vinothkumar, K R]] |
| + | [[Category: Bi-functional enzyme]] | ||
| + | [[Category: Dehydrogenase]] | ||
| + | [[Category: Hydrolase]] | ||
| + | [[Category: Substrate channeling]] | ||
Revision as of 22:19, 6 March 2020
Structure of PaaZ, a bifunctional enzyme
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