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2gcd

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{{STRUCTURE_2gcd| PDB=2gcd | SCENE= }}
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'''TAO2 kinase domain-staurosporine structure'''
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===TAO2 kinase domain-staurosporine structure===
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==Overview==
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Mitogen-activated protein kinase (MAPK) signal transduction pathways are ubiquitous in eukaryotic cells, which transfer signals from the cell surface to the nucleus, controlling multiple cellular programs. MAPKs are activated by MAPK kinases [MAP2Ks or MAP/extracellular signal-regulated kinase (ERK) kinases (MEK)], which in turn are activated by MAPK kinase kinases (MAP3Ks). TAO2 is a MAP3K level kinase that activates the MAP2Ks MEK3 and MEK6 to activate p38 MAPKs. Because p38 MAPKs are key regulators of expression of inflammatory cytokines, they appear to be involved in human diseases such as asthma and autoimmunity. As an upstream activator of p38s, TAO2 represents a potential drug target. Here we report the crystal structure of active TAO2 kinase domain in complex with staurosporine, a broad-range protein kinase inhibitor that inhibits TAO2 with an IC50 of 3 mM. The structure reveals that staurosporine occupies the position where the adenosine of ATP binds in TAO2, and the binding of the inhibitor mimics many features of ATP binding. Both polar and nonpolar interactions contribute to the enzyme-inhibitor recognition. Staurosporine induces conformational changes in TAO2 residues that surround the inhibitor molecule, but causes very limited global changes in the kinase. The structure provides atomic details for TAO2-staurosporine interactions, and explains the relatively low potency of staurosporine against TAO2. The structure presented here should aid in the design of inhibitors specific to TAO2 and related kinases.
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==About this Structure==
==About this Structure==
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[[Category: Staurosporine]]
[[Category: Staurosporine]]
[[Category: Tao2]]
[[Category: Tao2]]
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Revision as of 06:48, 29 July 2008

Image:2gcd.png

Template:STRUCTURE 2gcd

TAO2 kinase domain-staurosporine structure

Template:ABSTRACT PUBMED 16761096

About this Structure

2GCD is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.

Reference

Crystal structure of the MAP3K TAO2 kinase domain bound by an inhibitor staurosporine., Zhou TJ, Sun LG, Gao Y, Goldsmith EJ, Acta Biochim Biophys Sin (Shanghai). 2006 Jun;38(6):385-92. PMID:16761096

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