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1umw
From Proteopedia
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|PDB= 1umw |SIZE=350|CAPTION= <scene name='initialview01'>1umw</scene>, resolution 1.90Å | |PDB= 1umw |SIZE=350|CAPTION= <scene name='initialview01'>1umw</scene>, resolution 1.90Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1umw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1umw OCA], [http://www.ebi.ac.uk/pdbsum/1umw PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1umw RCSB]</span> | ||
}} | }} | ||
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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 Mon Mar 31 00:12:26 2008'' |
Revision as of 21:12, 30 March 2008
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| , resolution 1.90Å | |||||||
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| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
STRUCTURE OF A HUMAN PLK1 POLO-BOX DOMAIN/PHOSPHOPEPTIDE COMPLEX
Overview
Polo-like kinases (Plks) perform crucial functions in cell-cycle progression and multiple stages of mitosis. Plks are characterized by a C-terminal noncatalytic region containing two tandem Polo boxes, termed the Polo-box domain (PBD), which has recently been implicated in phosphodependent substrate targeting. We show that the PBDs of human, Xenopus, and yeast Plks all recognize similar phosphoserine/threonine-containing motifs. The 1.9 A X-ray structure of a human Plk1 PBD-phosphopeptide complex shows that the Polo boxes each comprise beta6alpha structures that associate to form a 12-stranded beta sandwich domain. The phosphopeptide binds along a conserved, positively charged cleft located at the edge of the Polo-box interface. Mutations that specifically disrupt phosphodependent interactions abolish cell-cycle-dependent localization and provide compelling phenotypic evidence that PBD-phospholigand binding is necessary for proper mitotic progression. In addition, phosphopeptide binding to the PBD stimulates kinase activity in full-length Plk1, suggesting a conformational switching mechanism for Plk regulation and a dual functionality for the PBD.
About this Structure
1UMW is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The molecular basis for phosphodependent substrate targeting and regulation of Plks by the Polo-box domain., Elia AE, Rellos P, Haire LF, Chao JW, Ivins FJ, Hoepker K, Mohammad D, Cantley LC, Smerdon SJ, Yaffe MB, Cell. 2003 Oct 3;115(1):83-95. PMID:14532005
Page seeded by OCA on Mon Mar 31 00:12:26 2008
