1BC9

CYTOHESIN-1/B2-1 SEC7 DOMAIN, NMR, MINIMIZED AVERAGE STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 287 
  • Conformers Submitted: 
  • Selection Criteria: MINIMIZED AVERAGE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the cytohesin-1 (B2-1) Sec7 domain and its interaction with the GTPase ADP ribosylation factor 1.

Betz, S.F.Schnuchel, A.Wang, H.Olejniczak, E.T.Meadows, R.P.Lipsky, B.P.Harris, E.A.Staunton, D.E.Fesik, S.W.

(1998) Proc.Natl.Acad.Sci.USA 95: 7909-7914


  • PubMed Abstract: 
  • Cytohesin-1 (B2-1) is a guanine nucleotide exchange factor for human ADP ribosylation factor (Arf) GTPases, which are important for vesicular protein trafficking and coatamer assembly in the cell. Cytohesin-1 also has been reported to promote cellula ...

    Cytohesin-1 (B2-1) is a guanine nucleotide exchange factor for human ADP ribosylation factor (Arf) GTPases, which are important for vesicular protein trafficking and coatamer assembly in the cell. Cytohesin-1 also has been reported to promote cellular adhesion via binding to the beta2 integrin cytoplasmic domain. The solution structure of the Sec7 domain of cytohesin-1, which is responsible for both the protein's guanine nucleotide exchange factor function and beta2 integrin binding, was determined by NMR spectroscopy. The structure consists of 10 alpha-helices that form a unique tertiary fold. The binding between the Sec7 domain and a soluble, truncated version of human Arf-1 was investigated by examining 1H-15N and 1H-13C chemical shift changes between the native protein and the Sec7/Arf-1 complex. We show that the binding to Arf-1 occurs through a large surface on the C-terminal subdomain that is composed of both hydrophobic and polar residues. Structure-based mutational analysis of the cytohesin-1 Sec7 domain has been used to identify residues important for binding to Arf and for mediating nucleotide exchange. Investigations into the interaction between the Sec7 domain and the beta2 integrin cytoplasmic domain suggest that the two proteins do not interact in the solution phase.


    Organizational Affiliation

    Pharmaceutical Discovery Division, Abbott Laboratories, Abbott Park, IL 60064, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOHESIN-1
A
200Homo sapiensGene Names: CYTH1 (D17S811E, PSCD1)
Find proteins for Q15438 (Homo sapiens)
Go to Gene View: CYTH1
Go to UniProtKB:  Q15438
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 287 
  • Conformers Submitted: 
  • Selection Criteria: MINIMIZED AVERAGE 
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-05-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance