1ZCB

Crystal structure of G alpha 13 in complex with GDP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 
    0.252 (Depositor), 0.250 (DCC) 
  • R-Value Work: 
    0.207 (Depositor), 0.210 (DCC) 
  • R-Value Observed: 
    0.209 (Depositor) 

Starting Model: experimental
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Ligand Structure Quality Assessment 

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This is version 1.4 of the entry. See complete history


Literature

A new approach to producing functional G alpha subunits yields the activated and deactivated structures of G alpha(12/13) proteins.

Kreutz, B.Yau, D.M.Nance, M.R.Tanabe, S.Tesmer, J.J.Kozasa, T.

(2006) Biochemistry 45: 167-174

  • DOI: https://doi.org/10.1021/bi051729t
  • Primary Citation of Related Structures:  
    1ZCA, 1ZCB

  • PubMed Abstract: 

    The oncogenic G(12/13) subfamily of heterotrimeric G proteins transduces extracellular signals that regulate the actin cytoskeleton, cell cycle progression, and gene transcription. Previously, structural analyses of fully functional G alpha(12/13) subunits have been hindered by insufficient amounts of homogeneous, functional protein. Herein, we report that substitution of the N-terminal helix of G alpha(i1) for the corresponding region of G alpha12 or G alpha13 generated soluble chimeric subunits (G alpha(i/12) and G alpha(i/13)) that could be purified in sufficient amounts for crystallographic studies. Each chimera bound guanine nucleotides, G betagamma subunits, and effector proteins and exhibited GAP responses to p115RhoGEF and leukemia-associated RhoGEF. Like their wild-type counterparts, G alpha(i/13), but not G alpha(i/12), stimulated the activity of p115RhoGEF. Crystal structures of the G alpha(i/12) x GDP x AlF4(-) and G alpha(i/13) x GDP complexes were determined using diffraction data extending to 2.9 and 2.0 A, respectively. These structures reveal not only the native structural features of G alpha12 and G alpha13 subunits, which are expected to be important for their interactions with GPCRs and effectors such as G alpha-regulated RhoGEFs, but also novel conformational changes that are likely coupled to GTP hydrolysis in the G alpha(12/13) class of heterotrimeric G proteins.


  • Organizational Affiliation

    Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
G alpha i/13362Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P27601 (Mus musculus)
Explore P27601 
Go to UniProtKB:  P27601
IMPC:  MGI:95768
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP27601
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download Ideal Coordinates CCD File 
B [auth A]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free:  0.252 (Depositor), 0.250 (DCC) 
  • R-Value Work:  0.207 (Depositor), 0.210 (DCC) 
  • R-Value Observed: 0.209 (Depositor) 
Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.391α = 90
b = 67.391β = 90
c = 175.159γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted GDPClick on this verticalbar to view details

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-11-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-08-16
    Changes: Source and taxonomy
  • Version 1.4: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description