1t3k
From Proteopedia
| Line 1: | Line 1: | ||
[[Image:1t3k.jpg|left|200px]] | [[Image:1t3k.jpg|left|200px]] | ||
| - | + | <!-- | |
| - | + | The line below this paragraph, containing "STRUCTURE_1t3k", creates the "Structure Box" on the page. | |
| - | + | You may change the PDB parameter (which sets the PDB file loaded into the applet) | |
| - | + | or the SCENE parameter (which sets the initial scene displayed when the page is loaded), | |
| - | + | or leave the SCENE parameter empty for the default display. | |
| - | + | --> | |
| - | + | {{STRUCTURE_1t3k| PDB=1t3k | SCENE= }} | |
| - | + | ||
| - | + | ||
| - | }} | + | |
'''NMR structure of a CDC25-like dual-specificity tyrosine phosphatase of Arabidopsis thaliana''' | '''NMR structure of a CDC25-like dual-specificity tyrosine phosphatase of Arabidopsis thaliana''' | ||
| Line 36: | Line 33: | ||
[[Category: Veylder, L De.]] | [[Category: Veylder, L De.]] | ||
[[Category: Wieruszeski, J M.]] | [[Category: Wieruszeski, J M.]] | ||
| - | [[Category: | + | [[Category: Cdc25]] |
| - | [[Category: | + | [[Category: Cell cycle]] |
| - | [[Category: | + | [[Category: Phosphorylation]] |
| - | [[Category: | + | [[Category: Plant]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 09:28:34 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 06:28, 3 May 2008
NMR structure of a CDC25-like dual-specificity tyrosine phosphatase of Arabidopsis thaliana
Overview
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.
About this Structure
1T3K is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.
Reference
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 Page seeded by OCA on Sat May 3 09:28:34 2008
