1AUA

PHOSPHATIDYLINOSITOL TRANSFER PROTEIN SEC14P FROM SACCHAROMYCES CEREVISIAE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the Saccharomyces cerevisiae phosphatidylinositol-transfer protein.

Sha, B.Phillips, S.E.Bankaitis, V.A.Luo, M.

(1998) Nature 391: 506-510

  • DOI: 10.1038/35179
  • Also Cited By: 1XGH

  • PubMed Abstract: 
  • The yeast phosphatidylinositol-transfer protein (Sec14) catalyses exchange of phosphatidylinositol and phosphatidylcholine between membrane bilayers in vitro. In vivo, Sec14 activity is essential for vesicle budding from the Golgi complex. Here we re ...

    The yeast phosphatidylinositol-transfer protein (Sec14) catalyses exchange of phosphatidylinositol and phosphatidylcholine between membrane bilayers in vitro. In vivo, Sec14 activity is essential for vesicle budding from the Golgi complex. Here we report a three-dimensional structure for Sec14 at 2.5 A resolution. Sec14 consists of twelve alpha-helices, six beta-strands, eight 3(10)-helices and has two distinct domains. The carboxy-terminal domain forms a hydrophobic pocket which, in the crystal structure, is occupied by two molecules of n-octyl-beta-D-glucopyranoside and represents the phospholipid-binding domain. This pocket is reinforced by a string motif whose disruption in a sec14 temperature-sensitive mutant results in destabilization of the phospholipid-binding domain. Finally, we have identified an unusual surface helix that may play a critical role in driving Sec14-mediated phospholipid exchange. From this structure, we derive the first molecular clues into how a phosphatidylinositol-transfer protein functions.


    Organizational Affiliation

    Center for Macromolecular Crystallography, Department of Microbiology, University of Alabama at Birmingham, 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHATIDYLINOSITOL TRANSFER PROTEIN SEC14P
A
296Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: SEC14 (PIT1)
Find proteins for P24280 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P24280
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BOG
Query on BOG

Download SDF File 
Download CCD File 
A
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.211 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 88.971α = 90.00
b = 88.971β = 90.00
c = 111.339γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
MLPHAREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-12-24
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance