3B1Z

Crystal structure of an S. thermophilus NFeoB T35S mutant without nucleotide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A suite of Switch I and Switch II mutant structures from the G-protein domain of FeoB

Ash, M.R.Maher, M.J.Guss, J.M.Jormakka, M.

(2011) Acta Crystallogr.,Sect.D 67: 973-980

  • DOI: 10.1107/S0907444911039461
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The acquisition of ferrous iron in prokaryotes is achieved by the G-protein-coupled membrane protein FeoB. This protein possesses a large C-terminal membrane-spanning domain preceded by two soluble cytoplasmic domains that are together termed 'NFeoB' ...

    The acquisition of ferrous iron in prokaryotes is achieved by the G-protein-coupled membrane protein FeoB. This protein possesses a large C-terminal membrane-spanning domain preceded by two soluble cytoplasmic domains that are together termed 'NFeoB'. The first of these soluble domains is a GTPase domain (G-domain), which is then followed by an entirely α-helical domain. GTP hydrolysis by the G-domain is essential for iron uptake by FeoB, and various NFeoB mutant proteins from Streptococcus thermophilus have been constructed. These mutations investigate the role of conserved amino acids from the protein's critical Switch regions. Five crystal structures of these mutant proteins have been determined. The structures of E66A and E67A mutant proteins were solved in complex with nonhydrolyzable GTP analogues, the structures of T35A and E67A mutant proteins were solved in complex with GDP and finally the structure of the T35S mutant was crystallized without bound nucleotide. As an ensemble, the structures illustrate how small nucleotide-dependent rearrangements at the active site are converted into large rigid-body reorientations of the helical domain in response to GTP binding and hydrolysis. This provides the first evidence of nucleotide-dependent helical domain movement in NFeoB proteins, suggesting a mechanism by which the G-protein domain could structurally communicate with the membrane domain and mediate iron uptake.


    Organizational Affiliation

    School of Molecular Bioscience, University of Sydney, NSW 2006, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ferrous iron uptake transporter protein B
A
272Streptococcus thermophilus (strain ATCC BAA-250 / LMG 18311)Mutation(s): 1 
Gene Names: feoB
Find proteins for Q5M586 (Streptococcus thermophilus (strain ATCC BAA-250 / LMG 18311))
Go to UniProtKB:  Q5M586
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: 2.65 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.219 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.400α = 90.00
b = 59.900β = 90.00
c = 85.300γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2012-04-18
    Type: Database references