1x96: Difference between revisions
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'''Crystal structure of Aldose Reductase with citrates bound in the active site'''<br /> | '''Crystal structure of Aldose Reductase with citrates bound in the active site'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
1X96 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with NAP and CIT as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Aldehyde_reductase Aldehyde reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.21 1.1.1.21] Full crystallographic information is available from [http:// | 1X96 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=NAP:'>NAP</scene> and <scene name='pdbligand=CIT:'>CIT</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Aldehyde_reductase Aldehyde reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.21 1.1.1.21] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X96 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: the c-terminal end of the barrel]] | [[Category: the c-terminal end of the barrel]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Feb 15 17:08:34 2008'' | ||
Revision as of 18:08, 15 February 2008
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Crystal structure of Aldose Reductase with citrates bound in the active site
OverviewOverview
Structure determinations of human aldose reductase holoenzyme in complex, with the 2S4R-,2R4S- and 2R4R-isomers of the potent inhibitor Fidarestat, ((2S,4S)-6-fluoro-2',5'-dioxospiro[chroman-4,4'-imidazoline]-2-carboxamide, ) were carried out in order to elucidate the binding modes responsible for, the differences in their inhibitory potencies. In the complex structure, with the 2R4S-isomer the cyclic imide moiety formed hydrogen bonds with, the side-chains of Trp111, Tyr48 and His110. In the attempt to determine, the complex structure with the least potent 2R4R-isomer this ligand was, not observed, and instead, the active site was simultaneously occupied by, two citrate molecules (occupancies of 60% and 40%). In the case of 2S4R, the active site was occupied by a citrate molecule which anchors the, 2S4R-isomer from its carbamoyl group. The structures of the complexes, suggest that the differences in the interactions between the cyclic imide, rings and carbamoyl groups of the compounds with residues His110, Trp111, Trp219 and Cys298 account for differences in their inhibitory potencies.
About this StructureAbout this Structure
1X96 is a Single protein structure of sequence from Homo sapiens with and as ligands. Active as Aldehyde reductase, with EC number 1.1.1.21 Full crystallographic information is available from OCA.
ReferenceReference
High-resolution structures of human aldose reductase holoenzyme in complex with stereoisomers of the potent inhibitor Fidarestat: stereospecific interaction between the enzyme and a cyclic imide type inhibitor., El-Kabbani O, Darmanin C, Oka M, Schulze-Briese C, Tomizaki T, Hazemann I, Mitschler A, Podjarny A, J Med Chem. 2004 Aug 26;47(18):4530-7. PMID:15317464
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