4G1U

X-ray structure of the bacterial heme transporter HmuUV from Yersinia pestis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.008 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.263 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

X-ray structure of the Yersinia pestis heme transporter HmuUV.

Woo, J.-S.Zeltina, A.Goetz, B.A.Locher, K.P.

(2012) Nat.Struct.Mol.Biol. 19: 1310-1315

  • DOI: 10.1038/nsmb.2417

  • PubMed Abstract: 
  • HmuUV is a bacterial ATP-binding cassette (ABC) transporter that catalyzes heme uptake into the cytoplasm of the gram-negative pathogen Yersinia pestis. We report the crystal structure of HmuUV at 3.0 Å resolution in a nucleotide-free state, which fe ...

    HmuUV is a bacterial ATP-binding cassette (ABC) transporter that catalyzes heme uptake into the cytoplasm of the gram-negative pathogen Yersinia pestis. We report the crystal structure of HmuUV at 3.0 Å resolution in a nucleotide-free state, which features a heme translocation pathway in an outward-facing conformation, poised to accept a heme from the cognate periplasmic binding protein HmuT. A new assay allowed us to determine in vitro rates of HmuUV-catalyzed heme transport into proteoliposomes and to establish the role of conserved residues in the translocation pathway of HmuUV and at the interface with HmuT. Differences in architecture relative to the related vitamin B(12) transporter BtuCD suggest an adaptation of HmuUV for its smaller substrate. Our study also suggests that type II ABC importers, which include bacterial iron-siderophore, heme and cobalamin transporters, have a coupling mechanism distinct from that of other ABC transporters.


    Organizational Affiliation

    Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemin transport system permease protein hmuU
A, B
357Yersinia pestisMutation(s): 0 
Gene Names: hmuU
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
HmuUV heme transporter
Find proteins for Q56992 (Yersinia pestis)
Go to UniProtKB:  Q56992
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hemin import ATP-binding protein HmuV
C, D
266Yersinia pestisMutation(s): 0 
Gene Names: hmuV
EC: 3.6.3.-
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
HmuUV heme transporter
Find proteins for Q56993 (Yersinia pestis)
Go to UniProtKB:  Q56993
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
C, D
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.008 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.263 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 100.870α = 90.00
b = 101.230β = 91.30
c = 105.210γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
SHELXSphasing
PDB_EXTRACTdata extraction
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-19
    Type: Initial release