1hlv

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{{STRUCTURE_1hlv| PDB=1hlv | SCENE= }}
{{STRUCTURE_1hlv| PDB=1hlv | SCENE= }}
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'''CRYSTAL STRUCTURE OF CENP-B(1-129) COMPLEXED WITH THE CENP-B BOX DNA'''
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===CRYSTAL STRUCTURE OF CENP-B(1-129) COMPLEXED WITH THE CENP-B BOX DNA===
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==Overview==
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The human centromere protein B (CENP-B), one of the centromere components, specifically binds a 17 bp sequence (the CENP-B box), which appears in every other alpha-satellite repeat. In the present study, the crystal structure of the complex of the DNA-binding region (129 residues) of CENP-B and the CENP-B box DNA has been determined at 2.5 A resolution. The DNA-binding region forms two helix-turn-helix domains, which are bound to adjacent major grooves of the DNA. The DNA is kinked at the two recognition helix contact sites, and the DNA region between the kinks is straight. Among the major groove protein-bound DNAs, this 'kink-straight-kink' bend contrasts with ordinary 'round bends' (gradual bending between two protein contact sites). The larger kink (43 degrees ) is induced by a novel mechanism, 'phosphate bridging by an arginine-rich helix': the recognition helix with an arginine cluster is inserted perpendicularly into the major groove and bridges the groove through direct interactions with the phosphate groups. The overall bending angle is 59 degrees, which may be important for the centromere-specific chromatin structure.
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(as it appears on PubMed at http://www.pubmed.gov), where 11726497 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11726497}}
==About this Structure==
==About this Structure==
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[[Category: Rsgi]]
[[Category: Rsgi]]
[[Category: Structural genomic]]
[[Category: Structural genomic]]
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Revision as of 05:22, 1 July 2008

Image:1hlv.png

Template:STRUCTURE 1hlv

CRYSTAL STRUCTURE OF CENP-B(1-129) COMPLEXED WITH THE CENP-B BOX DNA

Template:ABSTRACT PUBMED 11726497

About this Structure

1HLV is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of the CENP-B protein-DNA complex: the DNA-binding domains of CENP-B induce kinks in the CENP-B box DNA., Tanaka Y, Nureki O, Kurumizaka H, Fukai S, Kawaguchi S, Ikuta M, Iwahara J, Okazaki T, Yokoyama S, EMBO J. 2001 Dec 3;20(23):6612-8. PMID:11726497

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