3LRB

Structure of E. coli AdiC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.61 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.295 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and mechanism of an amino acid antiporter

Gao, X.Lu, F.Zhou, L.Dang, S.Sun, L.Li, X.Wang, J.Shi, Y.

(2009) Science 324: 1565-1568

  • DOI: 10.1126/science.1173654
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Virulent enteric pathogens such as Escherichia coli strain O157:H7 rely on acid-resistance (AR) systems to survive the acidic environment in the stomach. A major component of AR is an arginine-dependent arginine:agmatine antiporter that expels intrac ...

    Virulent enteric pathogens such as Escherichia coli strain O157:H7 rely on acid-resistance (AR) systems to survive the acidic environment in the stomach. A major component of AR is an arginine-dependent arginine:agmatine antiporter that expels intracellular protons. Here, we report the crystal structure of AdiC, the arginine:agmatine antiporter from E. coli O157:H7 and a member of the amino acid/polyamine/organocation (APC) superfamily of transporters at 3.6 A resolution. The overall fold is similar to that of several Na+-coupled symporters. AdiC contains 12 transmembrane segments, forms a homodimer, and exists in an outward-facing, open conformation in the crystals. A conserved, acidic pocket opens to the periplasm. Structural and biochemical analysis reveals the essential ligand-binding residues, defines the transport route, and suggests a conserved mechanism for the antiporter activity.


    Organizational Affiliation

    State Key Laboratory of Bio-membrane and Membrane Biotechnology, Tsinghua University, Beijing 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Arginine/agmatine antiporter
A, B
445Escherichia coli O157:H7Mutation(s): 0 
Gene Names: adiC
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Amino Acid/Polyamine/Organocation (APC) Superfamily
Protein: 
AdiC Arginine:Agmatine Antiporter
Find proteins for P60063 (Escherichia coli O157:H7)
Go to UniProtKB:  P60063
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.61 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.295 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 92.810α = 90.00
b = 108.300β = 90.00
c = 138.110γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
BSSdata collection
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance