2iyr

File:2iyr.gif

spinqualitylabelsall models 2iyr, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

SHIKIMATE KINASE FROM MYCOBACTERIUM TUBERCULOSIS IN COMPLEX WITH SHIKIMATE

OverviewOverview

The structural mechanism of the catalytic functioning of shikimate kinase from Mycobacterium tuberculosis was investigated on the basis of a series of high-resolution crystal structures corresponding to individual steps in the enzymatic reaction. The catalytic turnover of shikimate and ATP into the products shikimate-3-phosphate and ADP, followed by release of ADP, was studied in the crystalline environment. Based on a comparison of the structural states before initiation of the reaction and immediately after the catalytic step, we derived a structural model of the transition state that suggests that phosphoryl transfer proceeds with inversion by an in-line associative mechanism. The random sequential binding of shikimate and nucleotides is associated with domain movements. We identified a synergic mechanism by which binding of the first substrate may enhance the affinity for the second substrate.

About this StructureAbout this Structure

2IYR is a Single protein structure of sequence from Mycobacterium tuberculosis with as ligand. Active as Shikimate kinase, with EC number 2.7.1.71 Known structural/functional Site: . Full crystallographic information is available from OCA.

ReferenceReference

Mechanism of phosphoryl transfer catalyzed by shikimate kinase from Mycobacterium tuberculosis., Hartmann MD, Bourenkov GP, Oberschall A, Strizhov N, Bartunik HD, J Mol Biol. 2006 Dec 1;364(3):411-23. Epub 2006 Sep 5. PMID:17020768

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