Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Crystal structure of the breakpoint cluster region-homology domain from phosphoinositide 3-kinase p85 alpha subunit.

Musacchio, A.Cantley, L.C.Harrison, S.C.

(1996) Proc Natl Acad Sci U S A 93: 14373-14378

  • DOI: https://doi.org/10.1073/pnas.93.25.14373
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Proteins such as the product of the break-point cluster region, chimaerin, and the Src homology 3-binding protein 3BP1, are GTPase activating proteins (GAPs) for members of the Rho subfamily of small GTP-binding proteins (G proteins or GTPases). A 200-residue region, named the breakpoint cluster region-homology (BH) domain, is responsible for the GAP activity. We describe here the crystal structure of the BH domain from the p85 subunit of phosphatidylinositol 3-kinase at 2.0 A resolution. The domain is composed of seven helices, having a previously unobserved arrangement. A core of four helices contains most residues that are conserved in the BH family. Their packing suggests the location of a G-protein binding site. This structure of a GAP-like domain for small GTP-binding proteins provides a framework for analyzing the function of this class of molecules.

  • Organizational Affiliation

    Laboratory of Molecular Medicine, Children's Hospital, Boston, MA 02115, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
216Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P27986 (Homo sapiens)
Explore P27986 
Go to UniProtKB:  P27986
PHAROS:  P27986
GTEx:  ENSG00000145675 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP27986
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.051α = 90
b = 90.513β = 97.19
c = 69.28γ = 90
Software Package:
Software NamePurpose
ARP/wARPmodel building
X-PLORmodel building
DENZOdata reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references