4RL5

Crystal structure of the Arabidopsis exocyst subunit exo70 family protein A1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.348 
  • R-Value Work: 0.324 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Endosidin2 targets conserved exocyst complex subunit EXO70 to inhibit exocytosis.

Zhang, C.Brown, M.Q.van de Ven, W.Zhang, Z.M.Wu, B.Young, M.C.Synek, L.Borchardt, D.Harrison, R.Pan, S.Luo, N.Huang, Y.M.Ghang, Y.J.Ung, N.Li, R.Isley, J.Morikis, D.Song, J.Guo, W.Hooley, R.J.Chang, C.E.Yang, Z.Zarsky, V.Muday, G.K.Hicks, G.R.Raikhel, N.V.

(2016) Proc.Natl.Acad.Sci.USA 113: E41-E50

  • DOI: 10.1073/pnas.1521248112

  • PubMed Abstract: 
  • The exocyst complex regulates the last steps of exocytosis, which is essential to organisms across kingdoms. In humans, its dysfunction is correlated with several significant diseases, such as diabetes and cancer progression. Investigation of the dyn ...

    The exocyst complex regulates the last steps of exocytosis, which is essential to organisms across kingdoms. In humans, its dysfunction is correlated with several significant diseases, such as diabetes and cancer progression. Investigation of the dynamic regulation of the evolutionarily conserved exocyst-related processes using mutants in genetically tractable organisms such as Arabidopsis thaliana is limited by the lethality or the severity of phenotypes. We discovered that the small molecule Endosidin2 (ES2) binds to the EXO70 (exocyst component of 70 kDa) subunit of the exocyst complex, resulting in inhibition of exocytosis and endosomal recycling in both plant and human cells and enhancement of plant vacuolar trafficking. An EXO70 protein with a C-terminal truncation results in dominant ES2 resistance, uncovering possible distinct regulatory roles for the N terminus of the protein. This study not only provides a valuable tool in studying exocytosis regulation but also offers a potentially new target for drugs aimed at addressing human disease.


    Organizational Affiliation

    Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, CA 92521; Department of Botany and Plant Sciences, University of California, Riverside, CA 92521;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component EXO70A1
A, B
565Arabidopsis thalianaMutation(s): 0 
Gene Names: EXO70A1
Find proteins for Q9LZD3 (Arabidopsis thaliana)
Go to UniProtKB:  Q9LZD3
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.348 
  • R-Value Work: 0.324 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.108α = 90.00
b = 72.117β = 90.00
c = 327.930γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
AutoSolphasing
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-11-25
    Type: Initial release
  • Version 1.1: 2015-12-09
    Type: Database references
  • Version 1.2: 2016-01-20
    Type: Database references
  • Version 1.3: 2017-08-23
    Type: Data collection