3MTT

Crystal structure of iSH2 domain of human p85beta, Northeast Structural Genomics Consortium Target HR5531C


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.250 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the iSH2 domain of human phosphatidylinositol 3-kinase p85beta subunit reveals conformational plasticity in the interhelical turn region

Schauder, C.Ma, L.C.Krug, R.M.Montelione, G.T.Guan, R.

(2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 1567-1571

  • DOI: 10.1107/S1744309110041333
  • Primary Citation of Related Structures:  
    3MTT

  • PubMed Abstract: 
  • Phosphatidylinositol 3-kinase (PI3K) proteins actively trigger signaling pathways leading to cell growth, proliferation and survival. These proteins have multiple isoforms and consist of a catalytic p110 subunit and a regulatory p85 subunit. The iSH2 ...

    Phosphatidylinositol 3-kinase (PI3K) proteins actively trigger signaling pathways leading to cell growth, proliferation and survival. These proteins have multiple isoforms and consist of a catalytic p110 subunit and a regulatory p85 subunit. The iSH2 domain of the p85β isoform has been implicated in the binding of nonstructural protein 1 (NS1) of influenza A viruses. Here, the crystal structure of human p85β iSH2 determined to 3.3 Å resolution is reported. The structure reveals that this domain mainly consists of a coiled-coil motif. Comparison with the published structure of the bovine p85β iSH2 domain bound to the influenza A virus nonstructural protein 1 indicates that little or no structural change occurs upon complex formation. By comparing this human p85β iSH2 structure with the bovine p85β iSH2 domain, which shares 99% sequence identity, and by comparing the multiple conformations observed within the asymmetric unit of the bovine iSH2 structure, it was found that this coiled-coil domain exhibits a certain degree of conformational variability or `plasticity' in the interhelical turn region. It is speculated that this plasticity of p85β iSH2 may play a role in regulating its functional and molecular-recognition properties.


    Organizational Affiliation

    Center for Advanced Biotechnology and Medicine, Department of Molecular Biology and Biochemistry, and Northeast Structural Genomics Consortium, Rutgers, The State University of New Jersey, 679 Hoes Lane, Piscataway, NJ 08854, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phosphatidylinositol 3-kinase regulatory subunit betaA187Homo sapiensMutation(s): 0 
Gene Names: PIK3R2
Find proteins for O00459 (Homo sapiens)
Explore O00459 
Go to UniProtKB:  O00459
NIH Common Fund Data Resources
PHAROS  O00459
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.250 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 174.588α = 90
b = 174.588β = 90
c = 102.699γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance