1xtc

From Proteopedia

Revision as of 14:27, 30 October 2007

CHOLERA TOXIN

Overview

The clinical manifestations of cholera are largely attributable to the, actions of a secreted hexameric AB5 enterotoxin (choleragen). We have, independently solved and refined the three-dimensional structure of, choleragen at 2.5 A resolution. The structure of the crystalline toxin, closely resembles that described for the heat-labile enterotoxin from, Escherichia coli (LT) with which it shares 80% sequence homology. In both, cases, the wedge-shaped A subunit is loosely held high above the plane of, the pentameric B subunits by the tethering A2 chain. The most striking, difference between the two toxins occurs at the carboxyl terminus of the, A2 chain. Whereas the last 14 residues of the A2 chain of LT threading, through the central pore of the B5 assembly form an extended chain with a, ... [(full description)]

About this Structure

1XTC is a [Protein complex] structure of sequences from [Vibrio cholerae]. The following page contains interesting information on the relation of 1XTC with [Cholera Toxin]. Structure known Active Sites: CAT, GAD, GAE, GAF, GAG and GAH. Full crystallographic information is available from [OCA].

Reference

The three-dimensional crystal structure of cholera toxin., Zhang RG, Scott DL, Westbrook ML, Nance S, Spangler BD, Shipley GG, Westbrook EM, J Mol Biol. 1995 Aug 25;251(4):563-73. PMID:7658473

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