3bzi

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{{STRUCTURE_3bzi| PDB=3bzi | SCENE= }}
{{STRUCTURE_3bzi| PDB=3bzi | SCENE= }}
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'''Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization'''
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===Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization===
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==Overview==
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Polo-like kinase (Plk1) is crucial for cell cycle progression through mitosis. Here we present the molecular and structural mechanisms that regulate the substrate recognition of Plk1 and influence its centrosomal localization and activity. Our work shows that Plk1 localization is controlled not only by the polo box domain (PBD); remarkably, the kinase domain is also involved in Plk1 targeting mechanism to the centrosome. The crystal structures of the PBD in complex with Cdc25C and Cdc25C-P target peptides reveal that Trp-414 is fundamental in their recognition regardless of its phosphorylation status. Binding measurements demonstrate that W414F mutation abolishes molecular recognition and diminishes centrosomal localization. Therefore, Plk1 centrosomal localization is not controlled by His-538 and Lys-540, the residues involved in phosphorylated target binding. The different conformations of the loop, which connects the polo boxes in the apo and the PBD-Cdc25C and PBD-Cdc25C-P complex structures, together with changes in the proline adjacent to the phosphothreonine in the target peptide, suggest a regulatory mechanism to detect binding of unphosphorylated or phosphorylated target substrates. Altogether, these data propose a model for the interaction between Plk1 and Cdc25C.
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{{ABSTRACT_PUBMED_17307877}}
==About this Structure==
==About this Structure==
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[[Category: Serine/threonine-protein kinase]]
[[Category: Serine/threonine-protein kinase]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 15:18:02 2008''

Revision as of 12:18, 29 July 2008

Image:3bzi.png

Template:STRUCTURE 3bzi

Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization

Template:ABSTRACT PUBMED 17307877

About this Structure

3BZI is a Protein complex structure of sequences from Homo sapiens. This structure supersedes the now removed PDB entry 2ojs. Full crystallographic information is available from OCA.

Reference

Molecular and structural basis of polo-like kinase 1 substrate recognition: Implications in centrosomal localization., Garcia-Alvarez B, de Carcer G, Ibanez S, Bragado-Nilsson E, Montoya G, Proc Natl Acad Sci U S A. 2007 Feb 27;104(9):3107-12. Epub 2007 Feb 16. PMID:17307877

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