2wk9

From Proteopedia

(Difference between revisions)

Current revision

Structure of Plp_Thr aldimine form of Vibrio cholerae CqsA

Structural highlights

2wk9 is a 2 chain structure with sequence from Vibrio cholerae O1 biovar El Tor str. N16961. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.9Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CQSA_VIBCH Required for the synthesis of the quorum-sensing autoinducer CAI-1 ((S)-3-hydroxytridecan-4-one) which probably functions as an intragenus signal.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

CqsA is an enzyme involved in the biosynthesis of cholerae autoinducer-1 (CAI-1), the major Vibrio cholerae autoinducer engaged in quorum sensing. The amino acid sequence of CqsA suggests that it belongs to the family of alpha-oxoamine synthases that catalyse the condensation of an amino acid to an acyl-CoA substrate. Here we present the apo- and PLP-bound crystal structures of CqsA and confirm that it shares structural homology with the dimeric alpha-oxoamine synthases, including a conserved PLP-binding site. The chemical structure of CAI-1 suggests that decanoyl-CoA may be one substrate of CqsA and that another substrate may be l-threonine or l-2-aminobutyric acid. A crystal structure of CqsA at 1.9-A resolution obtained in the presence of PLP and l-threonine reveals an external aldimine that has lost the l-threonine side chain. Similarly, a 1.9-A-resolution crystal structure of CqsA in the presence of PLP, l-threonine, and decanoyl-CoA shows a trapped external aldimine intermediate, suggesting that the condensation and decarboxylation steps have occurred, again with loss of the l-threonine side chain. It is suggested that this side-chain loss, an observation supported by mass spectrometry, is due to a retro-aldol reaction. Although no structural data have been obtained on CqsA using l-2-aminobutyric acid and decanoyl-CoA as substrates, mass spectrometry confirms the expected product of the enzyme reaction. It is proposed that a region of structure that is disordered in the apo structure is involved in the release of product. While not confirming if CqsA alone is able to synthesize CAI-1, these results suggest possible synthetic routes.

Insights into the biosynthesis of the Vibrio cholerae major autoinducer CAI-1 from the crystal structure of the PLP-dependent enzyme CqsA.,Jahan N, Potter JA, Sheikh MA, Botting CH, Shirran SL, Westwood NJ, Taylor GL J Mol Biol. 2009 Sep 25;392(3):763-73. Epub 2009 Jul 22. PMID:19631226^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Jahan N, Potter JA, Sheikh MA, Botting CH, Shirran SL, Westwood NJ, Taylor GL. Insights into the biosynthesis of the Vibrio cholerae major autoinducer CAI-1 from the crystal structure of the PLP-dependent enzyme CqsA. J Mol Biol. 2009 Sep 25;392(3):763-73. Epub 2009 Jul 22. PMID:19631226 doi:10.1016/j.jmb.2009.07.042

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2wk9"

@@ Line 3: / Line 3: @@
 <StructureSection load='2wk9' size='340' side='right'caption='[[2wk9]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2wk9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibch Vibch]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WK9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WK9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2wk9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_cholerae_O1_biovar_El_Tor_str._N16961 Vibrio cholerae O1 biovar El Tor str. N16961]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WK9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WK9 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PLG:N-GLYCINE-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YL-METHANE]'>PLG</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2wk7|2wk7]], [[2wka|2wka]], [[2wk8|2wk8]]</div></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PLG:N-GLYCINE-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YL-METHANE]'>PLG</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2wk9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wk9 OCA], [https://pdbe.org/2wk9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2wk9 RCSB], [https://www.ebi.ac.uk/pdbsum/2wk9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2wk9 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[https://www.uniprot.org/uniprot/CQSA_VIBCH CQSA_VIBCH]] Required for the synthesis of the quorum-sensing autoinducer CAI-1 ((S)-3-hydroxytridecan-4-one) which probably functions as an intragenus signal.
+[https://www.uniprot.org/uniprot/CQSA_VIBCH CQSA_VIBCH] Required for the synthesis of the quorum-sensing autoinducer CAI-1 ((S)-3-hydroxytridecan-4-one) which probably functions as an intragenus signal.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 34: / Line 34: @@
 </StructureSection>
 [[Category: Large Structures]]
-[[Category: Vibch]]
+[[Category: Vibrio cholerae O1 biovar El Tor str. N16961]]
-[[Category: Botting, C H]]
+[[Category: Botting CH]]
-[[Category: Jahan, N]]
+[[Category: Jahan N]]
-[[Category: Potter, J A]]
+[[Category: Potter JA]]
-[[Category: Sheikh, M A]]
+[[Category: Sheikh MA]]
-[[Category: Shirran, S L]]
+[[Category: Shirran SL]]
-[[Category: Taylor, G L]]
+[[Category: Taylor GL]]
-[[Category: Westwood, N J]]
+[[Category: Westwood NJ]]
-[[Category: Acyltransferase]]
-[[Category: Aminotransferase]]
-[[Category: Autoinducer]]
-[[Category: Cai-1]]
-[[Category: Cqsa]]
-[[Category: Oxoamine-synthase]]
-[[Category: Pyridoxal phosphate]]
-[[Category: Quorum-sensing]]
-[[Category: Transferase]]

2wk9

From Proteopedia

Current revision

Structure of Plp_Thr aldimine form of Vibrio cholerae CqsA

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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