Ral binding domain from Sec5

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: LOWEST ENERGY 

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This is version 1.3 of the entry. See complete history


Structure of the GTPase-binding domain of Sec5 and elucidation of its Ral binding site.

Mott, H.R.Nietlispach, D.Hopkins, L.J.Mirey, G.Camonis, J.H.Owen, D.

(2003) J Biol Chem 278: 17053-17059

  • DOI: https://doi.org/10.1074/jbc.M300155200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The exocyst complex is involved in the final stages of exocytosis, when vesicles are targeted to the plasma membrane and dock. The regulation of exocytosis is vital for a number of processes, for example, cell polarity, embryogenesis, and neuronal growth formation. Regulation of the exocyst complex in mammals was recently shown to be dependent upon binding of the small G protein, Ral, to Sec5, a central component of the exocyst. This interaction is thought to be necessary for anchoring the exocyst to secretory vesicles. We have determined the structure of the Ral-binding domain of Sec5 and shown that it adopts a fold that has not been observed in a G protein effector before. This fold belongs to the immunoglobulin superfamily in a subclass known as IPT domains. We have mapped the Ral binding site on this domain and found that it overlaps with protein-protein interaction sites on other IPT domains but that it is completely different from the G protein-geranyl-geranyl interaction face of the Ig-like domain of the Rho guanine nucleotide dissociation inhibitor. This mapping, along with available site-directed mutagenesis data, allows us to predict how Ral and Sec5 may interact.

  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, 80, Tennis Court Road, Cambridge CB2 1GA, United Kingdom. mott@bio.cam.ac.uk

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
EXOCYST COMPLEX COMPONENT SEC595Mus musculusMutation(s): 0 
Gene Names: Exoc2Sec5Sec5l1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9D4H1 (Mus musculus)
Explore Q9D4H1 
Go to UniProtKB:  Q9D4H1
IMPC:  MGI:1913732
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9D4H1
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 25 
  • Selection Criteria: LOWEST ENERGY 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-03-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-28
    Changes: Database references, Source and taxonomy