4i4c: Difference between revisions
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==Crystal structure of the protein frsA complexed with unknown ligand== | |||
<StructureSection load='4i4c' size='340' side='right' caption='[[4i4c]], [[Resolution|resolution]] 1.95Å' scene=''> | |||
{ | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4i4c]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Vibrio_vulnificus Vibrio vulnificus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4I4C OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4I4C FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=1PG:2-(2-{2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL'>1PG</scene>, <scene name='pdbligand=6NA:HEXANOIC+ACID'>6NA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3mve|3mve]], [[3our|3our]]</td></tr> | |||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">frsA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=672 Vibrio vulnificus])</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=4i4c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4i4c OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4i4c RCSB], [http://www.ebi.ac.uk/pdbsum/4i4c PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The fermentation-respiration switch (FrsA) protein in Vibrio vulnificus was recently reported to catalyze the cofactor-independent decarboxylation of pyruvate. We now report quantum mechanical/molecular mechenical calculations that examine the energetics of C-C bond cleavage for a pyruvate molecule bound within the putative active site of FrsA. These calculations suggest that the barrier to C-C bond cleavage in the bound substrate is 28 kcal/mol, which is similar to that estimated for the uncatalyzed decarboxylation of pyruvate in water at 25 degrees C. In agreement with the theoretical predictions, no pyruvate decarboxylase activity was detected for recombinant FrsA protein that could be crystallized and structurally characterized. These results suggest that the functional annotation of FrsA as a cofactor-independent pyruvate decarboxylase is incorrect. | |||
Computational, structural, and kinetic evidence that Vibrio vulnificus FrsA is not a cofactor-independent pyruvate decarboxylase.,Kellett WF, Brunk E, Desai BJ, Fedorov AA, Almo SC, Gerlt JA, Rothlisberger U, Richards NG Biochemistry. 2013 Mar 19;52(11):1842-4. doi: 10.1021/bi400093y. Epub 2013 Mar 5. PMID:23452154<ref>PMID:23452154</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Vibrio vulnificus]] | [[Category: Vibrio vulnificus]] | ||
[[Category: Almo, S C | [[Category: Almo, S C]] | ||
[[Category: Desai, B | [[Category: Desai, B]] | ||
[[Category: Fedorov, A A | [[Category: Fedorov, A A]] | ||
[[Category: Fedorov, E V | [[Category: Fedorov, E V]] | ||
[[Category: Gerlt, J A | [[Category: Gerlt, J A]] | ||
[[Category: Richards, N | [[Category: Richards, N]] | ||
[[Category: Two-domain protein frsa]] | [[Category: Two-domain protein frsa]] | ||
[[Category: Unknown function]] | [[Category: Unknown function]] | ||
[[Category: Unknown ligand]] | [[Category: Unknown ligand]] | ||
Revision as of 15:56, 21 December 2014
Crystal structure of the protein frsA complexed with unknown ligandCrystal structure of the protein frsA complexed with unknown ligand
Structural highlights
Publication Abstract from PubMedThe fermentation-respiration switch (FrsA) protein in Vibrio vulnificus was recently reported to catalyze the cofactor-independent decarboxylation of pyruvate. We now report quantum mechanical/molecular mechenical calculations that examine the energetics of C-C bond cleavage for a pyruvate molecule bound within the putative active site of FrsA. These calculations suggest that the barrier to C-C bond cleavage in the bound substrate is 28 kcal/mol, which is similar to that estimated for the uncatalyzed decarboxylation of pyruvate in water at 25 degrees C. In agreement with the theoretical predictions, no pyruvate decarboxylase activity was detected for recombinant FrsA protein that could be crystallized and structurally characterized. These results suggest that the functional annotation of FrsA as a cofactor-independent pyruvate decarboxylase is incorrect. Computational, structural, and kinetic evidence that Vibrio vulnificus FrsA is not a cofactor-independent pyruvate decarboxylase.,Kellett WF, Brunk E, Desai BJ, Fedorov AA, Almo SC, Gerlt JA, Rothlisberger U, Richards NG Biochemistry. 2013 Mar 19;52(11):1842-4. doi: 10.1021/bi400093y. Epub 2013 Mar 5. PMID:23452154[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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