6TQU

The crystal structure of the MSP domain of human MOSPD2 in complex with the Phospho-FFAT motif of STARD3.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

wwPDB Validation   3D Report Full Report



Literature

FFAT motif phosphorylation controls formation and lipid transfer function of inter-organelle contacts.

Di Mattia, T.Martinet, A.Ikhlef, S.McEwen, A.G.Nomine, Y.Wendling, C.Poussin-Courmontagne, P.Voilquin, L.Eberling, P.Ruffenach, F.Cavarelli, J.Slee, J.Levine, T.P.Drin, G.Tomasetto, C.Alpy, F.

(2020) EMBO J : e104369-e104369

  • DOI: 10.15252/embj.2019104369
  • Primary Citation of Related Structures:  
    6TQR, 6TQT, 6TQS, 6TQU

  • PubMed Abstract: 
  • Organelles are physically connected in membrane contact sites. The endoplasmic reticulum possesses three major receptors, VAP-A, VAP-B, and MOSPD2, which interact with proteins at the surface of other organelles to build contacts. VAP-A, VAP-B, and M ...

    Organelles are physically connected in membrane contact sites. The endoplasmic reticulum possesses three major receptors, VAP-A, VAP-B, and MOSPD2, which interact with proteins at the surface of other organelles to build contacts. VAP-A, VAP-B, and MOSPD2 contain an MSP domain, which binds a motif named FFAT (two phenylalanines in an acidic tract). In this study, we identified a non-conventional FFAT motif where a conserved acidic residue is replaced by a serine/threonine. We show that phosphorylation of this serine/threonine is critical for non-conventional FFAT motifs (named Phospho-FFAT) to be recognized by the MSP domain. Moreover, structural analyses of the MSP domain alone or in complex with conventional and Phospho-FFAT peptides revealed new mechanisms of interaction. Based on these new insights, we produced a novel prediction algorithm, which expands the repertoire of candidate proteins with a Phospho-FFAT that are able to create membrane contact sites. Using a prototypical tethering complex made by STARD3 and VAP, we showed that phosphorylation is instrumental for the formation of ER-endosome contacts, and their sterol transfer function. This study reveals that phosphorylation acts as a general switch for inter-organelle contacts.


    Organizational Affiliation

    Université de Strasbourg, Illkirch, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Motile sperm domain-containing protein 2AB135Homo sapiensMutation(s): 0 
Gene Names: MOSPD2
Find proteins for Q8NHP6 (Homo sapiens)
Explore Q8NHP6 
Go to UniProtKB:  Q8NHP6
NIH Common Fund Data Resources
PHAROS  Q8NHP6
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
StAR-related lipid transfer protein 3CD21Homo sapiensMutation(s): 0 
Gene Names: STARD3CAB1MLN64
Find proteins for Q14849 (Homo sapiens)
Explore Q14849 
Go to UniProtKB:  Q14849
NIH Common Fund Data Resources
PHAROS  Q14849
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
C,DL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.968α = 90
b = 87.968β = 90
c = 95.13γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French National Research AgencyFranceANR-19-CE44-0003
French National Research AgencyFranceANR-10-INSB-05-01
French National Research AgencyFranceANR-10-LABX-0030-INRT
French National Research AgencyFranceANR-10-IDEX-0002-02.

Revision History 

  • Version 1.0: 2020-11-18
    Type: Initial release