2qlr

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[[Image:2qlr.jpg|left|200px]]
[[Image:2qlr.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 2qlr |SIZE=350|CAPTION= <scene name='initialview01'>2qlr</scene>, resolution 2.30&Aring;
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The line below this paragraph, containing "STRUCTURE_2qlr", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=AC1:Gol+Binding+Site+For+Residue+A+426'>AC1</scene>, <scene name='pdbsite=AC2:Gol+Binding+Site+For+Residue+A+427'>AC2</scene>, <scene name='pdbsite=AC3:Gol+Binding+Site+For+Residue+B+426'>AC3</scene>, <scene name='pdbsite=AC4:Gol+Binding+Site+For+Residue+C+427'>AC4</scene>, <scene name='pdbsite=AC5:Gol+Binding+Site+For+Residue+C+428'>AC5</scene>, <scene name='pdbsite=AC6:Gol+Binding+Site+For+Residue+C+429'>AC6</scene>, <scene name='pdbsite=AC7:Gol+Binding+Site+For+Residue+C+430'>AC7</scene>, <scene name='pdbsite=AC8:Gol+Binding+Site+For+Residue+D+426'>AC8</scene>, <scene name='pdbsite=AC9:Gol+Binding+Site+For+Residue+D+427'>AC9</scene>, <scene name='pdbsite=BC1:Gol+Binding+Site+For+Residue+D+428'>BC1</scene> and <scene name='pdbsite=BC2:Gol+Binding+Site+For+Residue+D+429'>BC2</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=LLP:2-LYSINE(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHANE)'>LLP</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY=
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or leave the SCENE parameter empty for the default display.
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|GENE= AADAT, KAT2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
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-->
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|DOMAIN=
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{{STRUCTURE_2qlr| PDB=2qlr | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2qlr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qlr OCA], [http://www.ebi.ac.uk/pdbsum/2qlr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2qlr RCSB]</span>
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}}
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'''Crystal structure of human kynurenine aminotransferase II'''
'''Crystal structure of human kynurenine aminotransferase II'''
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[[Category: Li, J.]]
[[Category: Li, J.]]
[[Category: Robinson, R.]]
[[Category: Robinson, R.]]
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[[Category: alpha & beta protein]]
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[[Category: Alpha & beta protein]]
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[[Category: alternative splicing]]
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[[Category: Alternative splicing]]
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[[Category: aminotransferase]]
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[[Category: Aminotransferase]]
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[[Category: mitochondrion]]
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[[Category: Mitochondrion]]
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[[Category: multifunctional enzyme]]
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[[Category: Multifunctional enzyme]]
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[[Category: plp-dependent transferase]]
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[[Category: Plp-dependent transferase]]
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[[Category: pyridoxal phosphate]]
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[[Category: Pyridoxal phosphate]]
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[[Category: transit peptide]]
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[[Category: Transit peptide]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 15:10:36 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 04:50:40 2008''
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Revision as of 12:10, 4 May 2008

Image:2qlr.jpg

Template:STRUCTURE 2qlr

Crystal structure of human kynurenine aminotransferase II


Overview

Human kynurenine aminotransferase II (hKAT-II) efficiently catalyzes the transamination of knunrenine to kynurenic acid (KYNA). KYNA is the only known endogenous antagonist of N-methyl-d-aspartate (NMDA) receptors and is also an antagonist of 7-nicotinic acetylcholine receptors. Abnormal concentrations of brain KYNA have been implicated in the pathogenesis and development of several neurological and psychiatric diseases in humans. Consequently, enzymes involved in the production of brain KYNA have been considered potential regulatory targets. In this article, we report a 2.16A crystal structure of hKAT-II and a 1.95A structure of its complex with kynurenine. The protein architecture of hKAT-II reveals that it belongs to the fold-type I pyridoxal 5-phosphate (PLP)-dependent enzymes. In comparison with all subclasses of fold-type I-PLP-dependent enzymes, we propose that hKAT-II represents a novel subclass in the fold-type I enzymes because of the unique folding of its first 65 N-terminal residues. This study provides a molecular basis for future effort in maintaining physiological concentrations of KYNA through molecular and biochemical regulation of hKAT-II.

About this Structure

2QLR is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal Structure of Human Kynurenine Aminotransferase II., Han Q, Robinson H, Li J, J Biol Chem. 2008 Feb 8;283(6):3567-73. Epub 2007 Dec 5. PMID:18056995 Page seeded by OCA on Sun May 4 15:10:36 2008

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