2I0N

Structure of Dictyostelium discoideum Myosin VII SH3 domain with adjacent proline rich region


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The SH3 domain of a M7 interacts with its C-terminal proline-rich region.

Wang, Q.Deloia, M.A.Kang, Y.Litchke, C.Zhang, N.Titus, M.A.Walters, K.J.

(2007) Protein Sci. 16: 189-196

  • DOI: 10.1110/ps.062496807

  • PubMed Abstract: 
  • Myosins play essential roles in migration, cytokinesis, endocytosis, and adhesion. They are composed of a large N-terminal motor domain with ATPase and actin binding sites and C-terminal neck and tail regions, whose functional roles and structural co ...

    Myosins play essential roles in migration, cytokinesis, endocytosis, and adhesion. They are composed of a large N-terminal motor domain with ATPase and actin binding sites and C-terminal neck and tail regions, whose functional roles and structural context in the protein are less well characterized. The tail regions of myosins I, IV, VII, XII, and XV each contain a putative SH3 domain that may be involved in protein-protein interactions. SH3 domains are reported to bind proline-rich motifs, especially "PxxP" sequences, and such interactions serve regulatory functions. The activity of Src, PI3, and Itk kinases, for example, is regulated by intramolecular interactions between their SH3 domain and internal proline-rich sequences. Here, we use NMR spectroscopy to reveal the structure of a protein construct from Dictyostelium myosin VII (DdM7) spanning A1620-T1706, which contains its SH3 domain and adjacent proline-rich region. The SH3 domain forms the signature beta-barrel architecture found in other SH3 domains, with conserved tryptophan and tyrosine residues forming a hydrophobic pocket known to bind "PxxP" motifs. In addition, acidic residues in the RT or n-Src loops are available to interact with the basic anchoring residues that are typically found in ligands or proteins that bind SH3 domains. The DdM7 SH3 differs in the hydrophobicity of the second pocket formed by the 3(10) helix and following beta-strand, which contains polar rather than hydrophobic side chains. Most unusual, however, is that this domain binds its adjacent proline-rich region at a surface remote from the region previously identified to bind "PxxP" motifs. The interaction may affect the orientation of the tail without sacrificing the availability of the canonical "PxxP"-binding surface.


    Organizational Affiliation

    Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Class VII unconventional myosin
A
80Dictyostelium discoideumMutation(s): 0 
Gene Names: myoI
Find proteins for Q9U1M8 (Dictyostelium discoideum)
Go to UniProtKB:  Q9U1M8
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2I0N Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-01-09
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance