1PHT

PHOSPHATIDYLINOSITOL 3-KINASE P85-ALPHA SUBUNIT SH3 DOMAIN, RESIDUES 1-85


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of P13K SH3 domain at 20 angstroms resolution.

Liang, J.Chen, J.K.Schreiber, S.T.Clardy, J.

(1996) J.Mol.Biol. 257: 632-643


  • PubMed Abstract: 
  • The P13K SH3 domain, residues 1 to 85 of the P1-3 kinase p85 subunit, has been characterized by X-ray diffraction. Crystals belonging to space group P4(3)2(1)2 diffract to 2.0 angstroms resolution and the structure was phased by single isomorphous re ...

    The P13K SH3 domain, residues 1 to 85 of the P1-3 kinase p85 subunit, has been characterized by X-ray diffraction. Crystals belonging to space group P4(3)2(1)2 diffract to 2.0 angstroms resolution and the structure was phased by single isomorphous replacement and anomalous scattering (SIRAS). As expected, the domain is a compact beta barrel with an over-all confirmation very similar to the independently determined NMR structures. The X-ray structure illuminates a discrepancy between the two NMR structures on the conformation of the loop region unique to P13K SH3. Furthermore, the ligand binding pockets of P13K SH3 domain are occupied by amino acid residues from symmetry-related P13K SH3 molecules: the C-terminal residues I(82) SPP of one and R18 of another. The interaction modes clearly resemble those observed for the P13K SH3 domain complexed with the synthetic peptide RLP1, a class 1 ligand, although there are significant differences. The solid-state interactions suggest a model of protein-protein aggregation that could be mediated by SH3 domains.


    Related Citations: 
    • Structural Basis for the Binding of Proline-Rich Peptides to SH3 Domains
      Yu, H.,Chen, J.K.,Dalgarno, D.C.,Brauer, A.W.,Schreiber, S.L.
      (1994) Cell 76: 933


    Organizational Affiliation

    Department of Chemistry, Baker Laboratory. Cornell University, Ithaca, NY 14853-1301, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHATIDYLINOSITOL 3-KINASE P85-ALPHA SUBUNIT
A
85Homo sapiensMutation(s): 0 
Gene Names: PIK3R1 (GRB1)
Find proteins for P27986 (Homo sapiens)
Go to Gene View: PIK3R1
Go to UniProtKB:  P27986
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.223 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 47.000α = 90.00
b = 47.000β = 90.00
c = 92.300γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance