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4cro

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[[Image:4cro.gif|left|200px]]
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{{STRUCTURE_4cro| PDB=4cro | SCENE= }}
{{STRUCTURE_4cro| PDB=4cro | SCENE= }}
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'''PROTEIN-DNA CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURE OF A LAMBDA CRO-OPERATOR COMPLEX'''
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===PROTEIN-DNA CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURE OF A LAMBDA CRO-OPERATOR COMPLEX===
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==Overview==
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The structure of a complex of bacteriophage lambda Cro protein with a 17-base-pair operator has been determined at 3.9-A resolution. Isomorphous derivatives obtained by the synthesis of site-specific iodinated DNA oligomers were of critical importance in solving the structure. The crystal structure contains three independent Cro-operator complexes that have very similar, although not necessarily identical, conformations. In the complex, the protein dimer undergoes a large conformational change relative to the crystal structure of the free protein. One monomer rotates by about 40 degrees relative to the other, this being accomplished primarily by a twisting of the two beta-sheet strands that connect one monomer with the other. In the complex, the DNA is bent by about 40 degrees into the shape of a boomerang but maintains essentially Watson-Crick B-form. In contrast to other known protein-DNA complexes, the DNA is not stacked end-to-end. The structure confirms the general features of the model previously proposed for the interaction of Cro with DNA.
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(as it appears on PubMed at http://www.pubmed.gov), where 2146682 is the PubMed ID number.
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{{ABSTRACT_PUBMED_2146682}}
==About this Structure==
==About this Structure==
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[[Category: Double helix]]
[[Category: Double helix]]
[[Category: Protein-dna complex]]
[[Category: Protein-dna complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:22:36 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 13:33:19 2008''

Revision as of 10:33, 3 July 2008

Image:4cro.png

Template:STRUCTURE 4cro

PROTEIN-DNA CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURE OF A LAMBDA CRO-OPERATOR COMPLEX

Template:ABSTRACT PUBMED 2146682

About this Structure

4CRO is a Single protein structure of sequence from Enterobacteria phage lambda. Full crystallographic information is available from OCA.

Reference

Protein-DNA conformational changes in the crystal structure of a lambda Cro-operator complex., Brennan RG, Roderick SL, Takeda Y, Matthews BW, Proc Natl Acad Sci U S A. 1990 Oct;87(20):8165-9. PMID:2146682

Page seeded by OCA on Thu Jul 3 13:33:19 2008

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