1T27

THE STRUCTURE OF PITP COMPLEXED TO PHOSPHATIDYLCHOLINE

• PDB DOI: https://doi.org/10.2210/pdb1T27/pdb
• Entry: 1T27 supersedes: 1FVZ

• Classification: LIPID BINDING PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-04-20 Released: 2004-05-11 
• Deposition Author(s): Yoder, M.D., Thomas, L.M., Tremblay, J.M., Oliver, R.L., Yarbrough, L.R., Helmkamp Jr., G.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.250 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Literature

STRUCTURE OF A MULTIFUNCTIONAL PROTEIN. MAMMALIAN PHOSPHATIDYLINOSITOL TRANSFER PROTEIN COMPLEXED WITH PHOSPHATIDYLCHOLINE

Yoder, M.D., Thomas, L.M., Tremblay, J.M., Oliver, R.L., Yarbrough, L.R., Helmkamp Jr., G.M.

(2001) J Biol Chem 276: 9246-9252

• PubMed: 11104777 
• DOI: https://doi.org/10.1074/jbc.M010131200
• Primary Citation of Related Structures:  
  1T27


• PubMed Abstract: 
  

  Eukaryotic phosphatidylinositol transfer protein is a ubiquitous multifunctional protein that transports phospholipids between membrane surfaces and participates in cellular phospholipid metabolism during signal transduction and vesicular trafficking. The three-dimensional structure of the alpha-isoform of rat phosphatidylinositol transfer protein complexed with one molecule of phosphatidylcholine, one of its physiological ligands, has been determined to 2.2 A resolution by x-ray diffraction techniques. A single beta-sheet and several long alpha-helices define an enclosed internal cavity in which a single molecule of the phospholipid is accommodated with its polar head group in the center of the protein and fatty acyl chains projected toward the surface. Other structural features suggest mechanisms by which cytosolic phosphatidylinositol transfer protein interacts with membranes for lipid exchange and associates with a variety of lipid and protein kinases.

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Organizational Affiliation: 

Division of Cell Biology and Biophysics, School of Biological Sciences, University of Missouri-Kansas City, Kansas City, Missouri 64110-2499 , USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 32.74 kDa 
• Atom Count: 2,429 
• Modelled Residue Count: 269 
• Deposited Residue Count: 271 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol transfer protein alpha isoform	A	271	Rattus norvegicus	Mutation(s): 0  Gene Names: PITPN, PITPNA
UniProt
Find proteins for P16446 (Rattus norvegicus) Explore P16446  Go to UniProtKB:  P16446

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PCW	B [auth A]	1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE C44 H85 N O8 P SNKAWJBJQDLSFF-NVKMUCNASA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.250 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.914	α = 90
b = 73.773	β = 114.73
c = 48.185	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-05-11 
Deposition Author(s): Yoder, M.D., Thomas, L.M., Tremblay, J.M., Oliver, R.L., Yarbrough, L.R., Helmkamp Jr., G.M.
• This entry supersedes: 1FVZ

Revision History  

• Version 1.0: 2004-05-11
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations