3M8J

Crystal structure of E.coli FocB at 1.4 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of FocB - a member of a family of transcription factors regulating fimbrial adhesin expression in uropathogenic Escherichia coli

Hultdin, U.W.Lindberg, S.Grundstrom, C.Huang, S.Uhlin, B.E.Sauer-Eriksson, A.E.

(2010) FEBS J 277: 3368-3381

  • DOI: 10.1111/j.1742-4658.2010.07742.x
  • Primary Citation of Related Structures:  
    3M8J

  • PubMed Abstract: 
  • In uropathogenic Escherichia coli, UPEC, different types of fimbriae are expressed to mediate interactions with host tissue. FocB belongs to the PapB family of transcription factors involved in the regulation of fimbriae gene clusters. Recent findings suggest that members from this family of proteins may form homomeric or heteromeric complexes and exert both positive and negative effects on the transcription of fimbriae genes ...

    In uropathogenic Escherichia coli, UPEC, different types of fimbriae are expressed to mediate interactions with host tissue. FocB belongs to the PapB family of transcription factors involved in the regulation of fimbriae gene clusters. Recent findings suggest that members from this family of proteins may form homomeric or heteromeric complexes and exert both positive and negative effects on the transcription of fimbriae genes. To elucidate the detailed function of FocB, we have determined its crystal structure at 1.4 A resolution. FocB is an all alpha-helical protein with a helix-turn-helix motif. Interestingly, conserved residues important for DNA-binding are located not in the postulated recognition helix of the motif, but in the preceding helix. Results from protein-DNA-binding studies suggest that FocB interacts with the minor groove of its cognate DNA target, which is indicative of a DNA interaction that is unusual for this motif. FocB crystallizes in the form of dimers. Packing interactions in the crystals give two plausible dimerization interfaces. Conserved residues, known to be important for protein oligomerization, are present at both interfaces, suggesting that both sites could play a role in a functional FocB protein.


    Related Citations: 
    • Purification, crystallization and preliminary data analysis of FocB, a transcription factor regulating fimbrial adhesin expression in uropathogenic Escherichia coli
      Hultdin, U.W., Lindberg, S., Grundstrom, C., Allgardsson, A., Huang, S., Stier, G., Ohman, A., Uhlin, B.E., Sauer-Eriksson, A.E.
      (2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 337

    Organizational Affiliation

    Department of Chemistry, Umeå University, Umeå, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FocB proteinA, B111Escherichia coliMutation(s): 0 
Gene Names: 
UniProt
Find proteins for Q93K76 (Escherichia coli)
Explore Q93K76 
Go to UniProtKB:  Q93K76
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ93K76
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.39α = 90
b = 58.823β = 90
c = 65.84γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
Auto-Rickshawphasing
REFMACrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance