3anv: Difference between revisions
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==Crystal structure of D-serine dehydratase from chicken kidney (2,3-DAP complex)== | ==Crystal structure of D-serine dehydratase from chicken kidney (2,3-DAP complex)== | ||
<StructureSection load='3anv' size='340' side='right' caption='[[3anv]], [[Resolution|resolution]] 2.09Å' scene=''> | <StructureSection load='3anv' size='340' side='right' caption='[[3anv]], [[Resolution|resolution]] 2.09Å' scene=''> | ||
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3anu|3anu]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3anu|3anu]]</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/D-serine_ammonia-lyase D-serine ammonia-lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.1.18 4.3.1.18] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/D-serine_ammonia-lyase D-serine ammonia-lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.1.18 4.3.1.18] </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=3anv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3anv OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3anv RCSB], [http://www.ebi.ac.uk/pdbsum/3anv PDBsum]</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=3anv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3anv OCA], [http://pdbe.org/3anv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3anv RCSB], [http://www.ebi.ac.uk/pdbsum/3anv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3anv ProSAT]</span></td></tr> | ||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3anv" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 06:05, 5 August 2016
Crystal structure of D-serine dehydratase from chicken kidney (2,3-DAP complex)Crystal structure of D-serine dehydratase from chicken kidney (2,3-DAP complex)
Structural highlights
Publication Abstract from PubMedD-serine is a physiological co-agonist of the N-methyl-D-aspartate receptor. It regulates excitatory neurotransmission, which is important for higher brain functions in vertebrates. In mammalian brains, D-amino acid oxidase degrades D-serine. However, we have found recently that in chicken brains the oxidase is not expressed and instead a D-serine dehydratase degrades D-serine. The primary structure of the enzyme shows significant similarities to those of metal-activated D-threonine aldolases, which are fold-type III pyridoxal 5'-phosphate (PLP)-dependent enzymes, suggesting that it is a novel class of D-serine dehydratase. In the present study, we characterized the chicken enzyme biochemically and also by x-ray crystallography. The enzyme activity on D-serine decreased 20-fold by EDTA treatment and recovered nearly completely by the addition of Zn(2+). None of the reaction products that would be expected from side reactions of the PLP-D-serine Schiff base were detected during the >6000 catalytic cycles of dehydration, indicating high reaction specificity. We have determined the first crystal structure of the D-serine dehydratase at 1.9 A resolution. In the active site pocket, a zinc ion that coordinates His(347) and Cys(349) is located near the PLP-Lys(45) Schiff base. A theoretical model of the enzyme-D-serine complex suggested that the hydroxyl group of D-serine directly coordinates the zinc ion, and that the epsilon-NH(2) group of Lys(45) is a short distance from the substrate Calpha atom. The alpha-proton abstraction from D-serine by Lys(45) and the elimination of the hydroxyl group seem to occur with the assistance of the zinc ion, resulting in the strict reaction specificity. Crystal structure of a zinc-dependent D-serine dehydratase from chicken kidney.,Tanaka H, Senda M, Venugopalan N, Yamamoto A, Senda T, Ishida T, Horiike K J Biol Chem. 2011 Aug 5;286(31):27548-58. Epub 2011 Jun 15. PMID:21676877[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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