1cqt: Difference between revisions
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[[Image:1cqt.gif|left|200px]] | [[Image:1cqt.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF A TERNARY COMPLEX CONTAINING AN OCA-B PEPTIDE, THE OCT-1 POU DOMAIN, AND AN OCTAMER ELEMENT''' | {{Structure | ||
|PDB= 1cqt |SIZE=350|CAPTION= <scene name='initialview01'>1cqt</scene>, resolution 3.20Å | |||
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|LIGAND= | |||
|ACTIVITY= | |||
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'''CRYSTAL STRUCTURE OF A TERNARY COMPLEX CONTAINING AN OCA-B PEPTIDE, THE OCT-1 POU DOMAIN, AND AN OCTAMER ELEMENT''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1CQT is a [ | 1CQT is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CQT OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface., Chasman D, Cepek K, Sharp PA, Pabo CO, Genes Dev. 1999 Oct 15;13(20):2650-7. PMID:[http:// | Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface., Chasman D, Cepek K, Sharp PA, Pabo CO, Genes Dev. 1999 Oct 15;13(20):2650-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10541551 10541551] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: protein-dna interface]] | [[Category: protein-dna interface]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:27:44 2008'' | ||
Revision as of 08:27, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
CRYSTAL STRUCTURE OF A TERNARY COMPLEX CONTAINING AN OCA-B PEPTIDE, THE OCT-1 POU DOMAIN, AND AN OCTAMER ELEMENT
Overview
We have determined the crystal structure, at 3.2 A, of a ternary complex containing an OCA-B peptide, the Oct-1 POU domain, and an octamer DNA site. The OCA-B peptide binds in the major groove near the center of the octamer site, and its polypeptide backbone forms a pair of hydrogen bonds with the adenine base at position 5 of the octamer DNA. Numerous protein-protein contacts between the OCA-B peptide and the POU domain are also involved in the ternary complex. In particular, the hydrophobic surface from a short alpha-helix of OCA-B helps to stabilize the complex by binding to a hydrophobic pocket on the POU-specific domain. The structure of this ternary complex is consistent with previous biochemical studies and shows how peptide-DNA and peptide-protein contacts from OCA-B provide structural and functional specificity in the regulation of immunoglobulin transcription.
About this Structure
1CQT is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface., Chasman D, Cepek K, Sharp PA, Pabo CO, Genes Dev. 1999 Oct 15;13(20):2650-7. PMID:10541551
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