1KMT

Crystal structure of RhoGDI Glu(154,155)Ala mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The impact of Glu-->Ala and Glu-->Asp mutations on the crystallization properties of RhoGDI: the structure of RhoGDI at 1.3 A resolution.

Mateja, A.Devedjiev, Y.Krowarsch, D.Longenecker, K.Dauter, Z.Otlewski, J.Derewenda, Z.S.

(2002) Acta Crystallogr D Biol Crystallogr 58: 1983-1991

  • DOI: 10.1107/s090744490201394x
  • Primary Citation of Related Structures:  
    1KMT

  • PubMed Abstract: 
  • It is hypothesized that surface residues with high conformational entropy, specifically lysines and glutamates, impede protein crystallization. In a previous study using a model system of Rho-specific guanine nucleotide dissociation inhibitor (RhoGDI ...

    It is hypothesized that surface residues with high conformational entropy, specifically lysines and glutamates, impede protein crystallization. In a previous study using a model system of Rho-specific guanine nucleotide dissociation inhibitor (RhoGDI), it was shown that mutating Lys residues to Ala results in enhanced crystallizability, particularly when clusters of lysines are targeted. It was also shown that one of these mutants formed crystals that yielded diffraction to 2.0 A, a significant improvement on the wild-type protein crystals. In the current paper, an analysis of the impact of surface mutations replacing Glu residues with Ala or Asp on the stability and crystallization properties of RhoGDI is presented. The Glu-->Ala (Asp) mutants are generally more likely to produce crystals of the protein than the wild-type and in one case the resulting crystals yielded a diffraction pattern to 1.2 A resolution. This occurs in spite of the fact that mutating surface Glu residues almost invariably affects the protein's stability, as illustrated by the reduced deltaG between folded and unfolded forms measured by isothermal equilibrium denaturation. The present study strongly supports the notion that rational surface mutagenesis can be an effective tool in overcoming problems stemming from the protein's recalcitrance to crystallization and may also yield dramatic improvements in crystal quality.


    Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia 22908, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Rho GDP-dissociation inhibitor 1AB141Homo sapiensMutation(s): 2 
Gene Names: ARHGDIAGDIA1
Find proteins for P52565 (Homo sapiens)
Explore P52565 
Go to UniProtKB:  P52565
NIH Common Fund Data Resources
PHAROS  P52565
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.099α = 79.19
b = 35.921β = 82.66
c = 67.506γ = 76.42
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-12-11
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance