1t3k

NMR structure of a CDC25-like dual-specificity tyrosine phosphatase of Arabidopsis thaliana

spinqualitylabelsall models 1t3k Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1t3k is a 1 chain structure with sequence from Arabidopsis thaliana. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Ligands: ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CDC25_ARATH Tyrosine protein phosphatase that dephosphorylates CDK complex and activate its kinase activity in vitro. Arsenate reductase that plays a major role in the reduction of arsenate to arsenite and arsenic retention in roots. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The dual-specificity CDC25 phosphatases are critical positive regulators of cyclin-dependent kinases (CDKs). Even though an antagonistic Arabidopsis thaliana WEE1 kinase has been cloned and tyrosine phosphorylation of its CDKs has been demonstrated, no valid candidate for a CDC25 protein has been reported in higher plants. We identify a CDC25-related protein (Arath;CDC25) of A. thaliana, constituted by a sole catalytic domain. The protein has a tyrosine-phosphatase activity and stimulates the kinase activity of Arabidopsis CDKs. Its tertiary structure was obtained by NMR spectroscopy and confirms that Arath;CDC25 belongs structurally to the classical CDC25 superfamily with a central five-stranded beta-sheet surrounded by helices. A particular feature of the protein, however, is the presence of an additional zinc-binding loop in the C-terminal part. NMR mapping studies revealed the interaction with phosphorylated peptidic models derived from the conserved CDK loop containing the phosphothreonine-14 and phosphotyrosine-15. We conclude that despite sequence divergence, Arath;CDC25 is structurally and functionally an isoform of the CDC25 superfamily, which is conserved in yeast and in plants, including Arabidopsis and rice. A small CDC25 dual-specificity tyrosine-phosphatase isoform in Arabidopsis thaliana.,Landrieu I, da Costa M, De Veylder L, Dewitte F, Vandepoele K, Hassan S, Wieruszeski JM, Corellou F, Faure JD, Van Montagu M, Inze D, Lippens G Proc Natl Acad Sci U S A. 2004 Sep 7;101(36):13380-5. Epub 2004 Aug 25. PMID:15329414 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dual specificity phosphatase 3D structures

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