Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42806.62 
• Atom Count: 2646 
• Residue Count: 362 
• Unique protein chains: 1

1ZCB

Crystal structure of G alpha 13 in complex with GDP

• DOI: 10.2210/pdb1ZCB/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Mus musculus
• Expression System: Spodoptera frugiperda


• Deposited: 2005-04-11 Released: 2005-11-15 
• Deposition Author(s): Nance, M.R., Tesmer, J.J.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 

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

• PubMed: 16388592 
• DOI: 10.1021/bi051729t
• Primary Citation of Related Structures:  
  1ZCA


• 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
G alpha i/13	A	362	Mus musculus	Mutation(s): 0  Gene Names: Gna13 (Gna-13)
Find proteins for P27601 (Mus musculus) Go to UniProtKB:  P27601

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GDP	A	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 67.391	α = 90.00
b = 67.391	β = 90.00
c = 175.159	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
PHASER	phasing
REFMAC	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-04-11 
• Released Date: 2005-11-15 
• Deposition Author(s): Nance, M.R., Tesmer, J.J.G.

Revision History 

• Version 1.0: 2005-11-15
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Advisory, Version format compliance
• Version 1.3: 2017-08-16
  Type: Source and taxonomy