3QNQ

Crystal structure of the transporter ChbC, the IIC component from the N,N'-diacetylchitobiose-specific phosphotransferase system


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.295 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a phosphorylation-coupled saccharide transporter.

Cao, Y.Jin, X.Levin, E.J.Huang, H.Zong, Y.Quick, M.Weng, J.Pan, Y.Love, J.Punta, M.Rost, B.Hendrickson, W.A.Javitch, J.A.Rajashankar, K.R.Zhou, M.

(2011) Nature 473: 50-54

  • DOI: 10.1038/nature09939

  • PubMed Abstract: 
  • Saccharides have a central role in the nutrition of all living organisms. Whereas several saccharide uptake systems are shared between the different phylogenetic kingdoms, the phosphoenolpyruvate-dependent phosphotransferase system exists almost excl ...

    Saccharides have a central role in the nutrition of all living organisms. Whereas several saccharide uptake systems are shared between the different phylogenetic kingdoms, the phosphoenolpyruvate-dependent phosphotransferase system exists almost exclusively in bacteria. This multi-component system includes an integral membrane protein EIIC that transports saccharides and assists in their phosphorylation. Here we present the crystal structure of an EIIC from Bacillus cereus that transports diacetylchitobiose. The EIIC is a homodimer, with an expansive interface formed between the amino-terminal halves of the two protomers. The carboxy-terminal half of each protomer has a large binding pocket that contains a diacetylchitobiose, which is occluded from both sides of the membrane with its site of phosphorylation near the conserved His250 and Glu334 residues. The structure shows the architecture of this important class of transporters, identifies the determinants of substrate binding and phosphorylation, and provides a framework for understanding the mechanism of sugar translocation.


    Organizational Affiliation

    Department of Physiology & Cellular Biophysics, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, New York, New York 10032, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PTS system, cellobiose-specific IIC component
A, B, C, D
442Bacillus cereus (strain ATCC 10987 / NRS 248)Mutation(s): 0 
Gene Names: celB
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Phosphoenolpyruvate-Dependent Phosphotransferases (PTSs)
Protein: 
ChbC EIIC phosphorylation-coupled saccharide transporter
Find proteins for Q72XQ0 (Bacillus cereus (strain ATCC 10987 / NRS 248))
Go to UniProtKB:  Q72XQ0
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
A, B, C, D
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
CIT
Query on CIT

Download SDF File 
Download CCD File 
A, B, C, D
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
ZDM
Query on ZDM

Download SDF File 
Download CCD File 
A, C
nonyl 4-O-alpha-D-glucopyranosyl-beta-D-glucopyranoside
nonyl-beta-D-maltoside
C21 H40 O11
KCCBGPCYGBPHBR-ZESVGKPKSA-N
 Ligand Interaction
CBS
Query on CBS

Download SDF File 
Download CCD File 
A, B, C, D
DI(N-ACETYL-D-GLUCOSAMINE)
C16 H28 N2 O11
CDOJPCSDOXYJJF-KSKNGZLJSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.295 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.228 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 132.812α = 90.00
b = 132.812β = 90.00
c = 452.954γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
DENZOdata reduction
HKL-2000data scaling
PDB_EXTRACTdata extraction
SHELXphasing
HKL-2000data reduction
DMphasing
PHENIXrefinement
SCALEPACKdata scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Advisory, Refinement description