2OR1

RECOGNITION OF A DNA OPERATOR BY THE REPRESSOR OF PHAGE 434. A VIEW AT HIGH RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Observed: 0.179 

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This is version 1.2 of the entry. See complete history


Literature

Recognition of a DNA operator by the repressor of phage 434: a view at high resolution.

Aggarwal, A.K.Rodgers, D.W.Drottar, M.Ptashne, M.Harrison, S.C.

(1988) Science 242: 899-907

  • DOI: 10.1126/science.3187531
  • Primary Citation of Related Structures:  
    2OR1

  • PubMed Abstract: 
  • The repressors of temperate bacteriophages such as 434 and lambda control transcription by binding to a set of DNA operator sites. The different affinity of repressor for each of these sites ensures efficient regulation. High-resolution x-ray crystallography was used to study the DNA-binding domain of phage 434 repressor in complex with a synthetic DNA operator ...

    The repressors of temperate bacteriophages such as 434 and lambda control transcription by binding to a set of DNA operator sites. The different affinity of repressor for each of these sites ensures efficient regulation. High-resolution x-ray crystallography was used to study the DNA-binding domain of phage 434 repressor in complex with a synthetic DNA operator. The structure shows recognition of the operator by direct interactions with base pairs in the major groove, combined with the sequence-dependent ability of DNA to adopt the required conformation on binding repressor. In particular, a network of three-centered bifurcated hydrogen bonds among base pairs in the operator helps explain why 434 repressor prefers certain sites over others. These bonds, which stabilize the conformation of the bound DNA, can form only with certain sequences.


    Related Citations: 
    • Structure of the Repressor-Operator Complex of Bacteriophage 434
      Anderson, J.E., Ptashne, M., Harrison, S.C.
      (1987) Nature 326: 846

    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, MA 02138.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
434 REPRESSORC [auth L],
D [auth R]
69Phage 434Mutation(s): 0 
Gene Names: CI
UniProt
Find proteins for P16117 (Enterobacteria phage 434)
Explore P16117 
Go to UniProtKB:  P16117
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16117
Protein Feature View
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganismImage
DNA (5'-D(*AP*AP*GP*TP*AP*CP*AP*AP*AP*CP*TP*TP*TP*CP*TP*TP*G P*TP*AP*T)-3')A 20N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(*TP*AP*TP*AP*CP*AP*AP*GP*AP*AP*AP*GP*TP*TP*TP*GP*T P*AP*CP*T)-3')B 20N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 148.3α = 90
b = 65β = 90
c = 27.7γ = 90
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1989-09-05
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance