6tqu

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

spinqualitylabelsall models 6tqu, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6tqu is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Ligands: SEP, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MSPD2_HUMAN Endoplasmic reticulum-anchored receptor which modulates interorganelle contacts by interacting with other organelle-bound proteins via their FFAT motif (PubMed:29858488). Might have a more important role in endoplasmic reticulum and endosomes contacts (PubMed:29858488). Promotes migration of primary monocytes and neutrophils, in response to various chemokines (PubMed:28137892). Publication Abstract from PubMed 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. FFAT motif phosphorylation controls formation and lipid transfer function of inter-organelle contacts.,Di Mattia T, Martinet A, Ikhlef S, McEwen AG, Nomine Y, Wendling C, Poussin-Courmontagne P, Voilquin L, Eberling P, Ruffenach F, Cavarelli J, Slee J, Levine TP, Drin G, Tomasetto C, Alpy F EMBO J. 2020 Oct 30:e104369. doi: 10.15252/embj.2019104369. PMID:33124732 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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