2g1k

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Revision as of 08:46, 21 November 2007

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spinqualitylabelsall models 2g1k, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

Crystal structure of Mycobacterium tuberculosis shikimate kinase in complex with shikimate at 1.75 angstrom resolution

Overview

Shikimate kinase (SK) and other enzymes in the shikimate pathway are, potential targets for developing nontoxic antimicrobial agents, herbicides, and antiparasite drugs, because the pathway is essential in, microorganisms, plants, and parasites but absent from mammals. SK, catalyzes the reaction of phosphoryl transfer from ATP to shikimic acid, (SA). Since 2002, a total of 11 SK structures have been reported, but none, contains either the two substrate (SA and ATP) or the two product, (SA-phosphate and ADP) molecules. Here, we present three crystal, structures of SK from Mycobacterium tuberculosis (MtSK), including, apo-MtSK, a binary complex MtSK x SA, and the ternary complex of MtSK with, SA and an ATP analogue, AMPPCP. The structures of apo-MtSK and MtSK x, AMPPCP x SA make it possible to elucidate the conformational changes of, MtSK upon the binding of both substrates; the structure of MtSK x AMPPCP x, SA reveals interactions between the protein and gamma-phosphate which, indicate dynamic roles of catalytic residues Lys15 and Arg117.

About this Structure

2G1K is a Single protein structure of sequence from Mycobacterium tuberculosis with SO4, CL and SKM as ligands. Active as Shikimate kinase, with EC number 2.7.1.71 Full crystallographic information is available from OCA.

Reference

Crystal structure of Mycobacterium tuberculosis shikimate kinase in complex with shikimic acid and an ATP analogue., Gan J, Gu Y, Li Y, Yan H, Ji X, Biochemistry. 2006 Jul 18;45(28):8539-45. PMID:16834327

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