3ML4

Crystal structure of a complex between Dok7 PH-PTB and the MuSK juxtamembrane region


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Cytoplasmic Adaptor Protein Dok7 Activates the Receptor Tyrosine Kinase MuSK via Dimerization.

Bergamin, E.Hallock, P.T.Burden, S.J.Hubbard, S.R.

(2010) Mol.Cell 39: 100-109

  • DOI: 10.1016/j.molcel.2010.06.007

  • PubMed Abstract: 
  • Formation of the vertebrate neuromuscular junction requires, among others proteins, Agrin, a neuronally derived ligand, and the following muscle proteins: LRP4, the receptor for Agrin; MuSK, a receptor tyrosine kinase (RTK); and Dok7 (or Dok-7), a cy ...

    Formation of the vertebrate neuromuscular junction requires, among others proteins, Agrin, a neuronally derived ligand, and the following muscle proteins: LRP4, the receptor for Agrin; MuSK, a receptor tyrosine kinase (RTK); and Dok7 (or Dok-7), a cytoplasmic adaptor protein. Dok7 comprises a pleckstrin-homology (PH) domain, a phosphotyrosine-binding (PTB) domain, and C-terminal sites of tyrosine phosphorylation. Unique among adaptor proteins recruited to RTKs, Dok7 is not only a substrate of MuSK, but also an activator of MuSK's kinase activity. Here, we present the crystal structure of the Dok7 PH-PTB domains in complex with a phosphopeptide representing the Dok7-binding site on MuSK. The structure and biochemical data reveal a dimeric arrangement of Dok7 PH-PTB that facilitates trans-autophosphorylation of the kinase activation loop. The structure provides the molecular basis for MuSK activation by Dok7 and for rationalizing several Dok7 loss-of-function mutations found in patients with congenital myasthenic syndromes.


    Organizational Affiliation

    Structural Biology Program, Kimmel Center for Biology and Medicine of the Skirball Institute and Department of Pharmacology, New York University School of Medicine, New York, NY 10016, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Dok-7
A, B, C, D
224Mus musculusGene Names: Dok7
Find proteins for Q18PE0 (Mus musculus)
Go to UniProtKB:  Q18PE0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Muscle, skeletal receptor tyrosine-protein kinase
E, F, G, H
13Mus musculusGene Names: Musk (Nsk2)
EC: 2.7.10.1
Find proteins for Q61006 (Mus musculus)
Go to UniProtKB:  Q61006
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
E, F, G, H
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.253 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 134.600α = 90.00
b = 134.600β = 90.00
c = 121.580γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance