1AGR

COMPLEX OF ALF4-ACTIVATED GI-ALPHA-1 WITH RGS4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of RGS4 bound to AlF4--activated G(i alpha1): stabilization of the transition state for GTP hydrolysis.

Tesmer, J.J.Berman, D.M.Gilman, A.G.Sprang, S.R.

(1997) Cell 89: 251-261

  • DOI: 10.1016/s0092-8674(00)80204-4
  • Primary Citation of Related Structures:  
    1AGR

  • PubMed Abstract: 
  • RGS proteins are GTPase activators for heterotrimeric G proteins. We report here the 2.8 A resolution crystal structure of the RGS protein RGS4 complexed with G(i alpha1)-Mg2+-GDP-AlF4 . Only the core domain of RGS4 is visible in the crystal. The core domain binds to the three switch regions of G(i alpha1), but does not contribute catalytic residues that directly interact with either GDP or AlF4- ...

    RGS proteins are GTPase activators for heterotrimeric G proteins. We report here the 2.8 A resolution crystal structure of the RGS protein RGS4 complexed with G(i alpha1)-Mg2+-GDP-AlF4 . Only the core domain of RGS4 is visible in the crystal. The core domain binds to the three switch regions of G(i alpha1), but does not contribute catalytic residues that directly interact with either GDP or AlF4-. Therefore, RGS4 appears to catalyze rapid hydrolysis of GTP primarily by stabilizing the switch regions of G(i alpha1), although the conserved Asn-128 from RGS4 could also play a catalytic role by interacting with the hydrolytic water molecule or the side chain of Gln-204. The binding site for RGS4 on G(i alpha1) is also consistent with the activity of RGS proteins as antagonists of G(alpha) effectors.


    Organizational Affiliation

    Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GUANINE NUCLEOTIDE-BINDING PROTEIN G(I)A, B [auth D]353Rattus norvegicusMutation(s): 0 
Gene Names: Gnai1Gnai-1
UniProt
Find proteins for P10824 (Rattus norvegicus)
Explore P10824 
Go to UniProtKB:  P10824
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RGS4C [auth E], D [auth H]205Rattus norvegicusMutation(s): 0 
Gene Names: Rgs4
UniProt
Find proteins for P49799 (Rattus norvegicus)
Explore P49799 
Go to UniProtKB:  P49799
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download Ideal Coordinates CCD File 
G [auth A], K [auth D]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
CIT
Query on CIT

Download Ideal Coordinates CCD File 
H [auth A], L [auth D]CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
ALF
Query on ALF

Download Ideal Coordinates CCD File 
F [auth A], J [auth D]TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
E [auth A], I [auth D]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 164α = 90
b = 97.2β = 90
c = 110γ = 90
Software Package:
Software NamePurpose
AVGSYSmodel building
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
AVGSYSphasing
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-06-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance