2iyt: Difference between revisions
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==Overview== | ==Overview== | ||
The structural mechanism of the catalytic functioning of shikimate kinase | 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 Structure== | ==About this Structure== | ||
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[[Category: Shikimate kinase]] | [[Category: Shikimate kinase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Bartunik, H | [[Category: Bartunik, H D.]] | ||
[[Category: Bourenkov, G | [[Category: Bourenkov, G P.]] | ||
[[Category: Hartmann, M | [[Category: Hartmann, M D.]] | ||
[[Category: Oberschall, A.]] | [[Category: Oberschall, A.]] | ||
[[Category: Strizhov, N.]] | [[Category: Strizhov, N.]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:57:29 2008'' | ||
Revision as of 18:57, 21 February 2008
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SHIKIMATE KINASE FROM MYCOBACTERIUM TUBERCULOSIS IN UNLIGANDED STATE, OPEN LID (CONF. A)
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
2IYT 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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OCA- Pages with broken file links
- Mycobacterium tuberculosis
- Shikimate kinase
- Single protein
- Bartunik, H D.
- Bourenkov, G P.
- Hartmann, M D.
- Oberschall, A.
- Strizhov, N.
- CL
- Amino-acid biosynthesis
- Aromatic amino acid biosynthesis
- Atp-binding
- Kinase
- Magnesium
- Metal-binding
- Nucleotide-binding
- P-loop kinase
- Shikimate pathway
- Transferase