1Q2H

Phenylalanine Zipper Mediates APS Dimerization


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.250 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A phenylalanine zipper mediates APS dimerization.

Dhe-Paganon, S.Werner, E.D.Nishi, M.Hansen, L.Chi, Y.-I.Shoelson, S.E.

(2004) Nat Struct Mol Biol 11: 968-974

  • DOI: 10.1038/nsmb829
  • Primary Citation of Related Structures:  
    1Q2H

  • PubMed Abstract: 
  • The APS, SH2-B and LNK proteins are adapters that activate and modulate receptor tyrosine kinase and JAK/STAT signaling. We now show that a conserved N-terminal domain mediates APS homodimerization. We determined the crystal structure of the dimerization domain at a resolution of 1 ...

    The APS, SH2-B and LNK proteins are adapters that activate and modulate receptor tyrosine kinase and JAK/STAT signaling. We now show that a conserved N-terminal domain mediates APS homodimerization. We determined the crystal structure of the dimerization domain at a resolution of 1.7 A using bromide ion MAD phasing. Each molecule contributes two helices to a compact four-helix bundle having a bisecting-U topology. Its most conspicuous feature is a stack of interdigitated phenylalanine side chains at the domain core. These residues create a new motif we refer to as a 'phenylalanine zipper,' which is critical to dimerization. A newly developed bridging yeast tri-hybrid assay showed that APS dimerizes JAK2, insulin receptor and IGF1 receptor kinases using its SH2 and dimerization domains. Dimerization via the phenylalanine zipper domain provides a mechanism for activating and modulating tyrosine kinase activity even in the absence of extracellular ligands.


    Organizational Affiliation

    Joslin Diabetes Center and Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
adaptor protein with pleckstrin homology and src homology 2 domainsA, B, C69Homo sapiensMutation(s): 0 
Gene Names: APSSH2B2
UniProt & NIH Common Fund Data Resources
Find proteins for O14492 (Homo sapiens)
Explore O14492 
Go to UniProtKB:  O14492
PHAROS:  O14492
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.250 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.74α = 90
b = 57.48β = 90
c = 51.72γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-03
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance