Crystal Structure of Rad G-domain-GTP Analog Complex

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

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RGK Family G-Domain:GTP Analog Complex Structures and Nucleotide-Binding Properties.

Sasson, Y.Navon-Perry, L.Huppert, D.Hirsch, J.A.

(2011) J Mol Biol 413: 372-389

  • DOI: https://doi.org/10.1016/j.jmb.2011.08.017
  • Primary Citation of Related Structures:  
    3Q72, 3Q7P, 3Q7Q, 3Q85

  • PubMed Abstract: 

    The RGK family of small G-proteins, including Rad, Gem, Rem1, and Rem2, is inducibly expressed in various mammalian tissues and interacts with voltage-dependent calcium channels and Rho kinase. Many questions remain regarding their physiological roles and molecular mechanism. Previous crystallographic studies reported RGK G-domain:guanosine di-phosphate structures. To test whether RGK proteins undergo a nucleotide-induced conformational change, we determined the crystallographic structures of Rad:GppNHp and Rem2:GppNHp to 1.7 and 1.8 Å resolutions, respectively. Also, we characterized the nucleotide-binding properties and conformations for Gem, Rad, and several structure-based mutants using fluorescence spectroscopy. The results suggest that RGK G-proteins may not behave as Ras-like canonical nucleotide-induced molecular switches. Further, the RGK proteins have differing structures and nucleotide-binding properties, which may have implications for their varied action on effectors.

  • Organizational Affiliation

    Department of Biochemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GTP-binding protein RAD
A, B
166Homo sapiensMutation(s): 0 
Gene Names: RRADRAD
UniProt & NIH Common Fund Data Resources
Find proteins for P55042 (Homo sapiens)
Explore P55042 
Go to UniProtKB:  P55042
PHAROS:  P55042
GTEx:  ENSG00000166592 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP55042
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
GNP PDBBind:  3Q7P Kd: 1574 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.628α = 90
b = 38.628β = 90
c = 153.456γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-21
    Type: Initial release
  • Version 1.1: 2011-10-26
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description