1ziz

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:1ziz.gif|left|200px]]
+
{{Seed}}
 +
[[Image:1ziz.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_1ziz| PDB=1ziz | SCENE= }}
{{STRUCTURE_1ziz| PDB=1ziz | SCENE= }}
-
'''Crystal Structure of Human Galactosyltransferase (GTB) Complexed with Galactose'''
+
===Crystal Structure of Human Galactosyltransferase (GTB) Complexed with Galactose===
-
==Overview==
+
<!--
-
The human ABO(H) blood group A and B antigens are generated by the homologous glycosyltransferases A (GTA) and B (GTB), which add the monosaccharides GalNAc and Gal, respectively, to the cell-surface H antigens. In the first comprehensive structural study of the recognition by a glycosyltransferase of a panel of substrates corresponding to acceptor fragments, 14 high resolution crystal structures of GTA and GTB have been determined in the presence of oligosaccharides corresponding to different segments of the type I (alpha-l-Fucp-(1--&gt;2)-beta-D-Galp-(1--&gt;3)-beta-D-GlcNAcp-OR, where R is a glycoprotein or glycolipid in natural acceptors) and type II (alpha-l-Fucp-(1--&gt;2)-beta-D-Galp-(1--&gt;4)-beta-d-GlcNAcp-OR) H antigen trisaccharides. GTA and GTB differ in only four "critical" amino acid residues (Arg/Gly-176, Gly/Ser-235, Leu/Met-266, and Gly/Ala-268). As these enzymes both utilize the H antigen acceptors, the four critical residues had been thought to be involved strictly in donor recognition; however, we now report that acceptor binding and subsequent transfer are significantly influenced by two of these residues: Gly/Ser-235 and Leu/Met-266. Furthermore, these structures show that acceptor recognition is dominated by the central Gal residue despite the fact that the L-Fuc residue is required for efficient catalysis and give direct insight into the design of model inhibitors for GTA and GTB.
+
The line below this paragraph, {{ABSTRACT_PUBMED_16326711}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 16326711 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_16326711}}
==About this Structure==
==About this Structure==
Line 35: Line 39:
[[Category: Retaining]]
[[Category: Retaining]]
[[Category: Transferase]]
[[Category: Transferase]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:41:03 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 13:44:19 2008''

Revision as of 10:44, 28 July 2008

Image:1ziz.png

Template:STRUCTURE 1ziz

Crystal Structure of Human Galactosyltransferase (GTB) Complexed with Galactose

Template:ABSTRACT PUBMED 16326711

About this Structure

1ZIZ is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Differential recognition of the type I and II H antigen acceptors by the human ABO(H) blood group A and B glycosyltransferases., Letts JA, Rose NL, Fang YR, Barry CH, Borisova SN, Seto NO, Palcic MM, Evans SV, J Biol Chem. 2006 Feb 10;281(6):3625-32. Epub 2005 Dec 2. PMID:16326711

Page seeded by OCA on Mon Jul 28 13:44:19 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ziz"
Personal tools