2PFT

The Crystal Structure of Mouse Exo70 Reveals Unique Features of the Mammalian Exocyst


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

The crystal structure of mouse Exo70 reveals unique features of the mammalian exocyst.

Moore, B.A.Robinson, H.H.Xu, Z.

(2007) J.Mol.Biol. 371: 410-421

  • DOI: 10.1016/j.jmb.2007.05.018
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The exocyst is a eukaryotic tethering complex necessary for the fusion of exocytic vesicles with the plasma membrane. Its function in vivo is tightly regulated by interactions with multiple small GTPases. Exo70, one of the eight subunits of the exocy ...

    The exocyst is a eukaryotic tethering complex necessary for the fusion of exocytic vesicles with the plasma membrane. Its function in vivo is tightly regulated by interactions with multiple small GTPases. Exo70, one of the eight subunits of the exocyst, is important for the localization of the exocyst to the plasma membrane. It interacts with TC10 and Rho3 GTPases in mammals and yeast, respectively, and has been shown recently to bind to the actin-polymerization complex Arp2/3. Here, we present the crystal structure of Mus musculus Exo70 at 2.25 A resolution. Exo70 is composed of alpha-helices in a series of right-handed helix-turn-helix motifs organized into a long rod of length 170 A and width 35 A. Although the alpha-helical organization of this molecule is similar to that in Saccharomyces cerevisiae Exo70, major structural differences are observed on the surface of the molecule, at the domain boundaries, and in various loop structures. In particular, the C-terminal domain of M. musculus Exo70 adopts a new orientation relative to the N-terminal half not seen in S. cerevisiae Exo70 structures. Given the low level of sequence conservation within Exo70, this structure provides new insights into our understanding of many species-specific functions of the exocyst.


    Organizational Affiliation

    Life Sciences Institute and Department of Biological Chemistry, Medical School, University of Michigan, Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Exocytosis Protein
A
571Mus musculusMutation(s): 0 
Gene Names: Exoc7 (Exo70)
Find proteins for O35250 (Mus musculus)
Go to UniProtKB:  O35250
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.235 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 61.520α = 90.00
b = 61.520β = 90.00
c = 294.730γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
Blu-Icedata collection
SHARPphasing
HKL-2000data scaling
SOLOMONphasing
CNSrefinement
DENZOdata reduction
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-04-05 
  • Released Date: 2007-05-22 
  • Deposition Author(s): Moore, B.A., Xu, Z.

Revision History 

  • Version 1.0: 2007-05-22
    Type: Initial release
  • Version 1.1: 2007-12-17
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model
  • Version 1.4: 2017-10-18
    Type: Refinement description