6mf5 | pdb_00006mf5

Crystal structure of budding yeast Cdc5 polo-box domain in complex with Spc72 phosphopeptide.

spinqualitylabelsall models 6mf5, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6mf5 is a 4 chain structure with sequence from Saccharomyces cerevisiae and Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.7Å Ligands: CL, SEP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CDC5_YEAST Protein kinase required for the cell cycle where it is involved in mitotic exit. A component of the fear (CDC14 early anaphase release) network which promotes CDC14 release from the nucleolus during early anaphase. Phosphorylates SCC1/MCD1 and NET1. Publication Abstract from PubMed Polo-like kinases (Plks) are key cell cycle regulators. They contain a kinase domain followed by a polo-box domain that recognizes phosphorylated substrates and enhances their phosphorylation. The regulatory subunit of the Dbf4-dependent kinase complex interacts with the polo-box domain of Cdc5 (the sole Plk in Saccharomyces cerevisiae) in a phosphorylation-independent manner. We have solved the crystal structures of the polo-box domain of Cdc5 on its own and in the presence of peptides derived from Dbf4 and a canonical phosphorylated substrate. The structure bound to the Dbf4-peptide reveals an additional density on the surface opposite to the phospho-peptide binding site that allowed us to propose a model for the interaction. We found that the two peptides can bind simultaneously and non-competitively to the polo-box domain in solution. Furthermore, point mutations on the surface opposite to the phosphopeptide binding site of the polo-box domain disrupt the interaction with the Dbf4 peptide in solution and cause an early anaphase arrest phenotype distinct from the mitotic exit defect typically observed in cdc5 mutants. Collectively, our data illustrates the importance of non-canonical interactions mediated by the polo-box domain and provide key mechanistic insights into the combinatorial recognition of substrates by Polo-like kinases. Distinct surfaces on Cdc5/PLK Polo-box domain orchestrate combinatorial substrate recognition during cell division.,Almawi AW, Langlois-Lemay L, Boulton S, Rodriguez Gonzalez J, Melacini G, D'Amours D, Guarne A Sci Rep. 2020 Feb 25;10(1):3379. doi: 10.1038/s41598-020-60344-4. PMID:32099015 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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