3W68

Crystal structure of mouse alpha-tocopherol transfer protein in complex with alpha-tocopherol and phosphatidylinositol-(4,5)-bisphosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Impaired alpha-TTP-PIPs interaction underlies familial vitamin E deficiency

Kono, N.Ohto, U.Hiramatsu, T.Urabe, M.Uchida, Y.Satow, Y.Arai, H.

(2013) Science 340: 1106-1110

  • DOI: 10.1126/science.1233508
  • Primary Citation of Related Structures:  
    3W67, 3W68

  • PubMed Abstract: 
  • α-Tocopherol (vitamin E) transfer protein (α-TTP) regulates the secretion of α-tocopherol from liver cells. Missense mutations of some arginine residues at the surface of α-TTP cause severe vitamin E deficiency in humans, but the role of these residues is unclear ...

    α-Tocopherol (vitamin E) transfer protein (α-TTP) regulates the secretion of α-tocopherol from liver cells. Missense mutations of some arginine residues at the surface of α-TTP cause severe vitamin E deficiency in humans, but the role of these residues is unclear. Here, we found that wild-type α-TTP bound phosphatidylinositol phosphates (PIPs), whereas the arginine mutants did not. In addition, PIPs in the target membrane promoted the intermembrane transfer of α-tocopherol by α-TTP. The crystal structure of the α-TTP-PIPs complex revealed that the disease-related arginine residues interacted with phosphate groups of the PIPs and that the PIPs binding caused the lid of the α-tocopherol-binding pocket to open. Thus, PIPs have a role in promoting the release of a ligand from a lipid-transfer protein.


    Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-tocopherol transfer proteinA, B, C, D266Mus musculusMutation(s): 0 
Gene Names: Ttpa
UniProt
Find proteins for Q8BWP5 (Mus musculus)
Explore Q8BWP5 
Go to UniProtKB:  Q8BWP5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4PT (Subject of Investigation/LOI)
Query on 4PT

Download Ideal Coordinates CCD File 
F [auth A], G [auth A], J [auth B](2R)-3-{[(S)-{[(2S,3R,5S,6S)-2,6-DIHYDROXY-3,4,5-TRIS(PHOSPHONOOXY)CYCLOHEXYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-2-(1-HYDROXY BUTOXY)PROPYL BUTYRATE
C17 H36 O22 P4
JPQZDANYJXWKKH-UASGXTILSA-N
 Ligand Interaction
PBU (Subject of Investigation/LOI)
Query on PBU

Download Ideal Coordinates CCD File 
I [auth B](2R)-3-{[(R)-HYDROXY{[(1R,2R,3S,4R,5R,6S)-2,3,6-TRIHYDROXY-4,5-BIS(PHOSPHONOOXY)CYCLOHEXYL]OXY}PHOSPHORYL]OXY}PROPANE-1 ,2-DIYL DIBUTANOATE
C17 H33 O19 P3
DHAFWWKSHUBGAH-BXJBXBQISA-N
 Ligand Interaction
VIV (Subject of Investigation/LOI)
Query on VIV

Download Ideal Coordinates CCD File 
E [auth A], H [auth B], K [auth C], O [auth D](2R)-2,5,7,8-TETRAMETHYL-2-[(4R,8R)-4,8,12-TRIMETHYLTRIDECYL]CHROMAN-6-OL
C29 H50 O2
GVJHHUAWPYXKBD-IEOSBIPESA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
L [auth C], M [auth C], N [auth C], P [auth D]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
VIV BindingDB:  3W68 Kd: 2.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.977α = 100.88
b = 69.62β = 109.45
c = 87.097γ = 100.01
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

  • Deposited Date: 2013-02-11 
  • Released Date: 2013-05-01 
  • Deposition Author(s): Ohto, U., Satow, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-09-04
    Changes: Database references
  • Version 1.2: 2014-01-29
    Changes: Non-polymer description