4Q5I

Crystal structure of a T151A mutant of the E. coli FeoB G-domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Exploring the correlation between the sequence composition of the nucleotide binding G5 loop of the FeoB GTPase domain (NFeoB) and intrinsic rate of GDP release.

Guilfoyle, A.P.Deshpande, C.N.Schenk, G.Maher, M.J.Jormakka, M.

(2014) Biosci Rep 34: e00158-e00158

  • DOI: 10.1042/BSR20140152
  • Primary Citation of Related Structures:  
    4Q00, 4Q5I

  • PubMed Abstract: 
  • GDP release from GTPases is usually extremely slow and is in general assisted by external factors, such as association with guanine exchange factors or membrane-embedded GPCRs (G protein-coupled receptors), which accelerate the release of GDP by several orders of magnitude ...

    GDP release from GTPases is usually extremely slow and is in general assisted by external factors, such as association with guanine exchange factors or membrane-embedded GPCRs (G protein-coupled receptors), which accelerate the release of GDP by several orders of magnitude. Intrinsic factors can also play a significant role; a single amino acid substitution in one of the guanine nucleotide recognition motifs, G5, results in a drastically altered GDP release rate, indicating that the sequence composition of this motif plays an important role in spontaneous GDP release. In the present study, we used the GTPase domain from EcNFeoB (Escherichia coli FeoB) as a model and applied biochemical and structural approaches to evaluate the role of all the individual residues in the G5 loop. Our study confirms that several of the residues in the G5 motif have an important role in the intrinsic affinity and release of GDP. In particular, a T151A mutant (third residue of the G5 loop) leads to a reduced nucleotide affinity and provokes a drastically accelerated dissociation of GDP.


    Organizational Affiliation

    *Structural Biology Program, Centenary Institute, Locked Bag 6, Sydney, New South Wales 2042, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ferrous iron transport protein B
A, B, C, D, E, F
A, B, C, D, E, F
270Escherichia coli K-12Mutation(s): 1 
Gene Names: feoBb3409JW3372
UniProt
Find proteins for P33650 (Escherichia coli (strain K12))
Explore P33650 
Go to UniProtKB:  P33650
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33650
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
G [auth D]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.978α = 115.67
b = 82.779β = 108.5
c = 95.505γ = 90.06
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MARmosaicdata collection
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-08
    Type: Initial release