3BRW

Structure of the Rap-RapGAP complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Rap-RapGAP complex: GTP hydrolysis without catalytic glutamine and arginine residues

Scrima, A.Thomas, C.Deaconescu, D.Wittinghofer, A.

(2008) Embo J. 27: 1145-1153

  • DOI: 10.1038/emboj.2008.30

  • PubMed Abstract: 
  • The GTP-binding protein Rap1 regulates integrin-mediated and other cell adhesion processes. Unlike most other Ras-related proteins, it contains a threonine in switch II instead of a glutamine (Gln61 in Ras), a residue crucial for the GTPase reaction ...

    The GTP-binding protein Rap1 regulates integrin-mediated and other cell adhesion processes. Unlike most other Ras-related proteins, it contains a threonine in switch II instead of a glutamine (Gln61 in Ras), a residue crucial for the GTPase reaction of most G proteins. Furthermore, unlike most other GTPase-activating proteins (GAPs) for small G proteins, which supply a catalytically important Arg-finger, no arginine residue of RapGAP makes a significant contribution to the GTPase reaction of Rap1. For a detailed understanding of the reaction mechanism, we have solved the structure of Rap1 in complex with Rap1GAP. It shows that the Thr61 of Rap is away from the active site and that an invariant asparagine of RapGAPs, the Asn-thumb, takes over the role of the cis-glutamine of Ras, Rho or Ran. The structure and biochemical data allow to further explain the mechanism and to define the important role of a conserved tyrosine. The structure and biochemical data furthermore show that the RapGAP homologous region of the tumour suppressor Tuberin is sufficient for catalysis on Rheb.


    Organizational Affiliation

    Department of Structural Biology, Max-Planck-Institute of Molecular Physiology, Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rap1 GTPase-activating protein 1
A, B, C
341Homo sapiensMutation(s): 1 
Gene Names: RAP1GAP (KIAA0474, RAP1GA1)
Find proteins for P47736 (Homo sapiens)
Go to Gene View: RAP1GAP
Go to UniProtKB:  P47736
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ras-related protein Rap-1b
D
167Homo sapiensMutation(s): 0 
Gene Names: RAP1B
Find proteins for P61224 (Homo sapiens)
Go to Gene View: RAP1B
Go to UniProtKB:  P61224
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
D
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
BEF
Query on BEF

Download SDF File 
Download CCD File 
D
BERYLLIUM TRIFLUORIDE ION
Be F3
OGIAHMCCNXDTIE-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.234 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 209.723α = 90.00
b = 209.723β = 90.00
c = 108.217γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
MAR345dtbdata collection
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-03-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance