2VEQ image
Deposition Date 2007-10-26
Release Date 2007-12-25
Last Version Date 2025-04-09
Entry Detail
PDB ID:
2VEQ
Keywords:
Title:
Insights into kinetochore-DNA interactions from the structure of Cep3p
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.49 Å
R-Value Free:
0.24
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 43 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:CENTROMERE DNA-BINDING PROTEIN COMPLEX CBF3 SUBUNIT B
Gene (Uniprot):CEP3
Chain IDs:A
Chain Length:565
Number of Molecules:1
Biological Source:SACCHAROMYCES CEREVISIAE
Primary Citation
Insights Into Kinetochore-DNA Interactions from the Structure of Cep3Delta
Embo Rep. 9 56 ? (2008)
PMID: 18064045 DOI: 10.1038/SJ.EMBOR.7401139

Abstact

The CBF3 complex is an essential core component of the budding yeast kinetochore and is required for the centromeric localization of all other kinetochore proteins. We determined the crystal structure of a large section of the protein Cep3 from CBF3, which is the only component with obvious DNA-binding motifs. The protein adopts a roughly bilobal shape, with an extended dimerization interface. The dimer has a large central channel that is sufficient to accommodate duplex B-form DNA. The zinc-finger domains emerge at the edges of the channel, and could bind to the DNA in a pseudo-symmetrical manner at degenerate half-sites in the centromeric sequence. We propose a mechanism for the modulation of DNA affinity by an acidic activator domain, which could be applicable to a wider family of transcription factors.

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Primary Citation of related structures