4ZLH

Structure of the LapB cytoplasmic domain at 2 angstroms


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

An Unexpected Duo: Rubredoxin Binds Nine TPR Motifs to Form LapB, an Essential Regulator of Lipopolysaccharide Synthesis.

Prince, C.Jia, Z.

(2015) Structure 23: 1500-1506

  • DOI: 10.1016/j.str.2015.06.011

  • PubMed Abstract: 
  • Lipopolysaccharide (LPS) synthesis and export are essential pathways for bacterial growth, proliferation, and virulence. The essential protein LapB from Escherichia coli has recently been identified as a regulator of LPS synthesis. We have determined ...

    Lipopolysaccharide (LPS) synthesis and export are essential pathways for bacterial growth, proliferation, and virulence. The essential protein LapB from Escherichia coli has recently been identified as a regulator of LPS synthesis. We have determined the crystal structure of LapB (without the N-terminal transmembrane helix) at 2 Å resolution using zinc single-wavelength anomalous diffraction phasing derived from a single bound zinc atom. This structure demonstrates the presence of nine tetratricopeptide repeats (TPR) motifs, including two TPR folds that were not predicted from sequence, and a rubredoxin-type metal binding domain. The rubredoxin domain is bound intimately to the TPR motifs, which has not been previously observed or predicted. Mutations in the rubredoxin/TPR interface inhibit in vivo cell growth, and in vitro studies indicate that these modifications cause local displacement of rubredoxin from its binding site without changing the secondary structure of LapB. LapB is the first reported structure to contain both a rubredoxin domain and TPR motifs.


    Organizational Affiliation

    Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L3N6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lipopolysaccharide assembly protein B
A, B
339Escherichia coli O157:H7Mutation(s): 0 
Gene Names: lapB (yciM)
Find proteins for P0AB60 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AB60
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 38.310α = 90.00
b = 152.250β = 93.91
c = 65.470γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXphasing
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-05-01 
  • Released Date: 2015-11-11 
  • Deposition Author(s): Prince, C.C., Jia, Z.

Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanada--

Revision History 

  • Version 1.0: 2015-11-11
    Type: Initial release