1HXD

CRYSTAL STRUCTURE OF E. COLI BIOTIN REPRESSOR WITH BOUND BIOTIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Corepressor-induced organization and assembly of the biotin repressor: a model for allosteric activation of a transcriptional regulator.

Weaver, L.H.Kwon, K.Beckett, D.Matthews, B.W.

(2001) Proc.Natl.Acad.Sci.USA 98: 6045-6050

  • DOI: 10.1073/pnas.111128198

  • PubMed Abstract: 
  • The Escherichia coli biotin repressor binds to the biotin operator to repress transcription of the biotin biosynthetic operon. In this work, a structure determined by x-ray crystallography of a complex of the repressor bound to biotin, which also fun ...

    The Escherichia coli biotin repressor binds to the biotin operator to repress transcription of the biotin biosynthetic operon. In this work, a structure determined by x-ray crystallography of a complex of the repressor bound to biotin, which also functions as an activator of DNA binding by the biotin repressor (BirA), is described. In contrast to the monomeric aporepressor, the complex is dimeric with an interface composed in part of an extended beta-sheet. Model building, coupled with biochemical data, suggests that this is the dimeric form of BirA that binds DNA. Segments of three surface loops that are disordered in the aporepressor structure are located in the interface region of the dimer and exhibit greater order than was observed in the aporepressor structure. The results suggest that the corepressor of BirA causes a disorder-to-order transition that is a prerequisite to repressor dimerization and DNA binding.


    Related Citations: 
    • MULTIPLE DISORDERED LOOPS FUNCTION IN COREPRESOR-INDUCED DIMERIZATION OF THE BIOTIN REPRESSOR
      Kwon, K.,Streaker, E.D.,Ruparelia, S.,Beckett, D.
      (2000) J.Mol.Biol. 304: 821
    • E. COLI BIOTIN HOLOENZYME SYNTHETASE/BIO REPRESSOR CRYSTAL STRUCTURE DELINEATES THE BIOTIN- AND DNA-BINDING DOMAINS
      Wilson, K.P.,Shewchuk, L.M.,Brennan, R.G.,Otsuka, A.J.,Matthews, B.W.
      (1992) Proc.Natl.Acad.Sci.USA 89: 9257


    Organizational Affiliation

    Institute for Molecular Biology, Howard Hughes Medical Institute and Department of Physics, 1229 University of Oregon, Eugene, OR 97403-1229, USA. brian@uoxray.uoregon.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BIRA BIFUNCTIONAL PROTEIN
A, B
321Escherichia coli (strain K12)Gene Names: birA (bioR, dhbB)
EC: 6.3.4.15
Find proteins for P06709 (Escherichia coli (strain K12))
Go to UniProtKB:  P06709
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BTN
Query on BTN

Download SDF File 
Download CCD File 
A, B
BIOTIN
C10 H16 N2 O3 S
YBJHBAHKTGYVGT-ZKWXMUAHSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BTNΔG: -41 - -58.1 kJ/mol (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Work: 0.189 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 104.900α = 90.00
b = 108.900β = 90.00
c = 143.200γ = 90.00
Software Package:
Software NamePurpose
SDMSdata scaling
TNTrefinement
SDMSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-05-30
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance