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1dcv

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[[Image:1dcv.gif|left|200px]]
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{{STRUCTURE_1dcv| PDB=1dcv | SCENE= }}
{{STRUCTURE_1dcv| PDB=1dcv | SCENE= }}
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'''B-DNA DECAMER WITH CENTRAL TA DINUCLEOTIDE'''
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===B-DNA DECAMER WITH CENTRAL TA DINUCLEOTIDE===
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==Overview==
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Holliday junctions are important structural intermediates in recombination, viral integration, and DNA repair. We present here the single-crystal structure of the inverted repeat sequence d(CCGGTACCGG) as a Holliday junction at the nominal resolution of 2. 1 A. Unlike the previous crystal structures, this DNA junction has B-DNA arms with all standard Watson-Crick base pairs; it therefore represents the intermediate proposed by Holliday as being involved in homologous recombination. The junction is in the stacked-X conformation, with two interconnected duplexes formed by coaxially stacked arms, and is crossed at an angle of 41.4 degrees as a right-handed X. A sequence comparison with previous B-DNA and junction crystal structures shows that an ACC trinucleotide forms the core of a stable junction in this system. The 3'-C x G base pair of this ACC core forms direct and water-mediated hydrogen bonds to the phosphates at the crossover strands. Interactions within this core define the conformation of the Holliday junction, including the angle relating the stacked duplexes and how the base pairs are stacked in the stable form of the junction.
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(as it appears on PubMed at http://www.pubmed.gov), where 10760268 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10760268}}
==About this Structure==
==About this Structure==
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[[Category: Central ta dinucleotide]]
[[Category: Central ta dinucleotide]]
[[Category: Deoxyribonucleic acid]]
[[Category: Deoxyribonucleic acid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:42:18 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 22:50:16 2008''

Revision as of 19:50, 30 June 2008

Image:1dcv.png

Template:STRUCTURE 1dcv

B-DNA DECAMER WITH CENTRAL TA DINUCLEOTIDE

Template:ABSTRACT PUBMED 10760268

About this Structure

Full crystallographic information is available from OCA.

Reference

The Holliday junction in an inverted repeat DNA sequence: sequence effects on the structure of four-way junctions., Eichman BF, Vargason JM, Mooers BH, Ho PS, Proc Natl Acad Sci U S A. 2000 Apr 11;97(8):3971-6. PMID:10760268

Page seeded by OCA on Mon Jun 30 22:50:16 2008

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