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1d5y

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{{STRUCTURE_1d5y| PDB=1d5y | SCENE= }}
{{STRUCTURE_1d5y| PDB=1d5y | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE E. COLI ROB TRANSCRIPTION FACTOR IN COMPLEX WITH DNA'''
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===CRYSTAL STRUCTURE OF THE E. COLI ROB TRANSCRIPTION FACTOR IN COMPLEX WITH DNA===
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==Overview==
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The Escherichia coli Rob protein is a transcription factor belonging to the AraC/XylS protein family that regulates genes involved in resistance to antibiotics, organic solvents and heavy metals. The genes encoding these proteins are activated by the homologous proteins MarA and SoxS, although the level of activation can vary for the different transcription factors. Here we report a 2.7 A crystal structure of Rob in complex with the micF promoter that reveals an unusual mode of binding to DNA. The Rob-DNA complex differs from the previously reported structure of MarA bound to the mar promoter, in that only one of Rob's dual helix-turn-helix (HTH) motifs engages the major groove of the binding site. Biochemical studies show that sequence specific interactions involving only one of Rob's HTH motifs are sufficient for high affinity binding to DNA. The two different modes of DNA binding seen in crystal structures of Rob and MarA also match the distinctive patterns of DNA protection by AraC at several sites within the pBAD promoter. These and other findings suggest that gene activation by AraC/XylS transcription factors might involve two alternative modes of binding to DNA in different promoter contexts.
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(as it appears on PubMed at http://www.pubmed.gov), where 10802742 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10802742}}
==About this Structure==
==About this Structure==
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[[Category: Protein-dna complex]]
[[Category: Protein-dna complex]]
[[Category: Rob transcription factor]]
[[Category: Rob transcription factor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:29:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 22:30:27 2008''

Revision as of 19:30, 30 June 2008

Image:1d5y.png

Template:STRUCTURE 1d5y

CRYSTAL STRUCTURE OF THE E. COLI ROB TRANSCRIPTION FACTOR IN COMPLEX WITH DNA

Template:ABSTRACT PUBMED 10802742

About this Structure

1D5Y is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Crystal structure of the Escherichia coli Rob transcription factor in complex with DNA., Kwon HJ, Bennik MH, Demple B, Ellenberger T, Nat Struct Biol. 2000 May;7(5):424-30. PMID:10802742

Page seeded by OCA on Mon Jun 30 22:30:27 2008

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