Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 130090.73 
• Atom Count: 7428 
• Residue Count: 1131 
• Unique protein chains: 2

1HE8

Ras G12V - PI 3-kinase gamma complex

• DOI: 10.2210/pdb1HE8/pdb

• Classification: KINASE/HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli, Spodoptera frugiperda
• Mutation(s): 3 


• Deposited: 2000-11-20 Released: 2001-01-08 
• Deposition Author(s): Pacold, M.E., Suire, S., Perisic, O., Lara-Gonzalez, S., Davis, C.T., Hawkins, P.T., Walker, E.H., Stephens, L., Eccleston, J.F., Williams, R.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.280 
• R-Value Work: 0.212 

Literature

Crystal Structure and Functional Analysis of Ras Binding to its Effector Phosphoinositide 3-Kinase Gamma

Pacold, M.E., Suire, S., Perisic, O., Lara-Gonzalez, S., Davis, C.T., Walker, E.H., Hawkins, P.T., Stephens, L., Eccleston, J.F., Williams, R.L.

(2000) Cell 103: 931

• PubMed: 11136978 


• PubMed Abstract: 
  

Ras activation of phosphoinositide 3-kinase (PI3K) is important for survival of transformed cells. We find that PI3Kgamma is strongly and directly activated by H-Ras G12V in vivo or by GTPgammaS-loaded H-Ras in vitro. We have determined a crystal structure of a PI3Kgamma/Ras.GMPPNP complex. A critical loop in the Ras binding domain positions Ras so that it uses its switch I and switch II regions to bind PI3Kgamma. Mutagenesis shows that interactions with both regions are essential for binding PI3Kgamma. Ras also forms a direct contact with the PI3Kgamma catalytic domain. These unique Ras/PI3Kgamma interactions are likely to be shared by PI3Kalpha. The complex with Ras shows a change in the PI3K conformation that may represent an allosteric component of Ras activation.

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Organizational Affiliation: 

MRC Laboratory of Molecular Biology Hills Road CB2 2QH, Cambridge, United Kingdom.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PHOSPHATIDYLINOSITOL 3-KINASE CATALYTIC SUBUNIT, GAMMA ISOFORM	A	965	Homo sapiens	Mutation(s): 2  Gene Names: PIK3CG EC: 2.7.1.153
Find proteins for P48736 (Homo sapiens) Go to Gene View: PIK3CG Go to UniProtKB:  P48736

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
TRANSFORMING PROTEIN P21/H-RAS-1	B	166	Homo sapiens	Mutation(s): 1  Gene Names: HRAS (HRAS1)
Find proteins for P01112 (Homo sapiens) Go to Gene View: HRAS Go to UniProtKB:  P01112

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
MG	B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N
GNP	B	PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER C10 H17 N6 O13 P3 UQABYHGXWYXDTK-UUOKFMHZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.280 
• R-Value Work: 0.212 
• Space Group: P 3₁ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 113.635	α = 90.00
b = 113.635	β = 90.00
c = 183.881	γ = 120.00

Software Package:

Software Name	Purpose
SCALA	data scaling
CNS	refinement
CNS	phasing
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-11-20 
• Released Date: 2001-01-08 
• Deposition Author(s): Pacold, M.E., Suire, S., Perisic, O., Lara-Gonzalez, S., Davis, C.T., Hawkins, P.T., Walker, E.H., Stephens, L., Eccleston, J.F., Williams, R.L.

Revision History 

• Version 1.0: 2001-01-08
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-07-12
  Type: Derived calculations