2GQQ

Crystal Structure of E. coli Leucine-responsive regulatory protein (Lrp)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.322 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the Escherichia coli Leucine-responsive Regulatory Protein Lrp Reveals a Novel Octameric Assembly.

de Los Rios, S.Perona, J.J.

(2007) J Mol Biol 366: 1589-1602

  • DOI: 10.1016/j.jmb.2006.12.032
  • Primary Citation of Related Structures:  
    2GQQ

  • PubMed Abstract: 
  • The structure of Escherichia coli leucine-responsive regulatory protein (Lrp) co-crystallized with a short duplex oligodeoxynucleotide reveals a novel quaternary assembly in which the protein octamer forms an open, linear array of four dimers. In con ...

    The structure of Escherichia coli leucine-responsive regulatory protein (Lrp) co-crystallized with a short duplex oligodeoxynucleotide reveals a novel quaternary assembly in which the protein octamer forms an open, linear array of four dimers. In contrast, structures of the Lrp homologs LrpA, LrpC and AsnC crystallized in the absence of DNA show that these proteins instead form highly symmetrical octamers in which the four dimers form a closed ring. Although the DNA is disordered within the Lrp crystal, comparative analyses suggest that the observed differences in quaternary state may arise from DNA interactions during crystallization. Interconversion of these conformations, possibly in response to DNA or leucine binding, provides an underlying mechanism to alter the relative spatial orientation of the DNA-binding domains. Breaking of the closed octamer symmetry may be a common essential step in the formation of active DNA complexes by all members of the Lrp/AsnC family of transcriptional regulatory proteins.


    Organizational Affiliation

    Interdepartmental Program in Biomolecular Science and Engineering, University of California at Santa Barbara, CA 93106-9510, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Leucine-responsive regulatory proteinABCD163Escherichia coliMutation(s): 0 
Gene Names: lrpalsBihblivRoppI
Find proteins for P0ACJ0 (Escherichia coli (strain K12))
Explore P0ACJ0 
Go to UniProtKB:  P0ACJ0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.322 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.1α = 90
b = 237β = 90
c = 75.6γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-03-06
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance