1MT0

ATP-binding domain of hemolysin B from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the nucleotide binding domain of the ABC-transporter hemolysin B: identification of a variable region within ABC helical domains

Schmitt, L.Benabdelhak, H.Blight, M.A.Holland, I.B.Stubbs, M.T.

(2003) J.Mol.Biol. 330: 333-342


  • PubMed Abstract: 
  • The ABC-transporter haemolysin B is a central component of the secretion machinery that translocates the toxin, haemolysin A, in a Sec-independent fashion across both membranes of E. coli. Here, we report the X-ray crystal structure of the nucleotide ...

    The ABC-transporter haemolysin B is a central component of the secretion machinery that translocates the toxin, haemolysin A, in a Sec-independent fashion across both membranes of E. coli. Here, we report the X-ray crystal structure of the nucleotide-binding domain (NBD) of HlyB. The molecule shares the common overall architecture of ABC-transporter NBDs. However, the last three residues of the Walker A motif adopt a 3(10) helical conformation, stabilized by a bound anion. In consequence, this results in an unusual interaction between the Walker A lysine residue and the Walker B glutamate residue. As these residues are normally required to be available for ATP binding, for catalysis and for dimer formation of ABC domains, we suggest that this conformation may represent a latent monomeric form of the NBD. Surprisingly, comparison of available NBD structures revealed a structurally diverse region (SDR) of about 30 residues within the helical arm II domain, unique to each of the eight NBDs analyzed. As this region interacts with the transmembrane part of ABC-transporters, the SDR helps to explain the selectivity and/or targeting of different NBDs to their cognate transmembrane domains.


    Organizational Affiliation

    Institut für Biochemie, Biozentrum N210, Johann Wolfgang Goethe Universität Frankfurt, Marie-Curie Str. 9, 60439, Frankfurt, Germany. lschmitt@em.uni-frankfurt.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemolysin secretion ATP-binding protein
A
241Escherichia coliGene Names: hlyB
Find proteins for P08716 (Escherichia coli)
Go to UniProtKB:  P08716
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.234 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 105.200α = 90.00
b = 105.200β = 90.00
c = 125.400γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-17
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance