2d0j

Crystal Structure of Human GlcAT-S Apo Form

spinqualitylabelsall models 2d0j, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2d0j is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function B3GA2_HUMAN Involved in the biosynthesis of L2/HNK-1 carbohydrate epitope on both glycolipids and glycoproteins (By similarity). 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 The HNK-1 carbohydrate epitope is found in various neural cell adhesion molecules. Two glucuronyltransferases (GlcAT-P and GlcAT-S) are involved in the biosynthesis of HNK-1 carbohydrate. Our previous study on the crystal structure of GlcAT-P revealed the reaction and substrate recognition mechanisms of this enzyme. Comparative analyses of the enzymatic activities of GlcAT-S and GlcAT-P showed that there are notable differences in the acceptor substrate specificities of these enzymes. To elucidate differences between their specificities, we now solved the crystal structure of GlcAT-S. Residues interacting with UDP molecule, which is a part of the donor substrate, are highly conserved between GlcAT-P and GlcAT-S. On the other hand, there are some differences between these proteins in the manner they recognize their respective acceptor substrates. Phe245, one of the most important GlcAT-P residues for the recognition of acceptors, is a tryptophan in GlcAT-S. In addition, Val320, which is located on the C-terminal long loop of the neighboring molecule in the dimer and critical in the recognition of the acceptor sugar molecule by the GlcAT-P dimer, is an alanine in GlcAT-S. These differences play key roles in establishing the distinct specificity for the acceptor substrate by GlcAT-S, which is further supported by site-directed mutagenesis of GlcAT-S and a computer-aided model building of GlcAT-S/substrate complexes. Crystal structure of GlcAT-S, a human glucuronyltransferase, involved in the biosynthesis of the HNK-1 carbohydrate epitope.,Shiba T, Kakuda S, Ishiguro M, Morita I, Oka S, Kawasaki T, Wakatsuki S, Kato R Proteins. 2006 Nov 1;65(2):499-508. PMID:16897771 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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