2RR3

Solution structure of the complex between human VAP-A MSP domain and human OSBP FFAT motif


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Electrostatic interaction between oxysterol-binding protein and VAMP-associated protein A revealed by NMR and mutagenesis studies

Furuita, K.Jee, J.Fukada, H.Mishima, M.Kojima, C.

(2010) J.Biol.Chem. 285: 12961-12970

  • DOI: 10.1074/jbc.M109.082602

  • PubMed Abstract: 
  • Oxysterol-binding protein (OSBP), a cytosolic receptor of cholesterol and oxysterols, is recruited to the endoplasmic reticulum by binding to the cytoplasmic major sperm protein (MSP) domain of integral endoplasmic reticulum protein VAMP-associated p ...

    Oxysterol-binding protein (OSBP), a cytosolic receptor of cholesterol and oxysterols, is recruited to the endoplasmic reticulum by binding to the cytoplasmic major sperm protein (MSP) domain of integral endoplasmic reticulum protein VAMP-associated protein-A (VAP-A), a process essential for the stimulation of sphingomyelin synthesis by 25-hydroxycholesterol. To delineate the interaction mechanism between VAP-A and OSBP, we determined the complex structure between the VAP-A MSP domain (VAP-A(MSP)) and the OSBP fragment containing a VAP-A binding motif FFAT (OSBP(F)) by NMR. This solution structure explained that five of six conserved residues in the FFAT motif are required for the stable complex formation, and three of five, including three critical intermolecular electrostatic interactions, were not explained before. By combining NMR relaxation and titration, isothermal titration calorimetry, and mutagenesis experiments with structural information, we further elucidated the detailed roles of the FFAT motif and underlying motions of VAP-A(MSP), OSBP(F), and the complex. Our results show that OSBP(F) is disordered in the free state, and VAP-A(MSP) and OSBP(F) form a final complex by means of intermediates, where electrostatic interactions through acidic residues, including an acid patch preceding the FFAT motif, probably play a collective role. Additionally, we report that the mutation that causes the familial motor neuron disease decreases the stability of the MSP domain.


    Organizational Affiliation

    Graduate School of Biological Sciences, Nara Institute of Science and Technology, Nara 630-0192, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vesicle-associated membrane protein-associated protein A
A
130Homo sapiensMutation(s): 0 
Gene Names: VAPA (VAP33)
Find proteins for Q9P0L0 (Homo sapiens)
Go to Gene View: VAPA
Go to UniProtKB:  Q9P0L0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Oxysterol-binding protein 1
B
47Homo sapiensMutation(s): 0 
Gene Names: OSBP (OSBP1)
Find proteins for P22059 (Homo sapiens)
Go to Gene View: OSBP
Go to UniProtKB:  P22059
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2RR3 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance