OSBPL5,8,10 exchange PS with PI4P from ER membrane to plasma membrane

Stable Identifier
Reaction [transition]
Homo sapiens
Locations in the PathwayBrowser
SVG |   | PPTX  | SBGN
Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout

Phosphatidylserine (PS) is a lipid component of cellular membranes. It is synthesised in the endoplasmic reticulum and then preferentially associates with the inner leaflet of the plasma membrane by as-yet unknown mechanisms. Intracellular lipids can travel through aqueous phases via transport vesicles or lipid-transfer proteins (LTPs). Oxysterol-binding protein-related proteins 5, 8 and 10 (OSBPL5, OSBPL8 and OSBPL10) bind and transport PS from ER compartments to the plasma membrane. They tether the ER to the plasma membrane via interaction of their pleckstrin homology domains with phosphatidylinositol 4-phosphate (PI4P) and mediate PI4P/PS countertransport between the ER and the plasma membrane (Du et al. 2011, Chung et al. 2015, Perttila et al. 2009, Maeda et al. 2013). OSBPL10 is also implicated in apolipoprotein B100 secretion (Nissila et al. 2012).

Literature References
PubMed ID Title Journal Year
19554302 OSBPL10, a novel candidate gene for high triglyceride trait in dyslipidemic Finnish subjects, regulates cellular lipid metabolism

Perttilä, J, Merikanto, K, Naukkarinen, J, Surakka, I, Martin, NW, Tanhuanpää, K, Grimard, V, Taskinen, MR, Thiele, C, Salomaa, V, Jula, A, Perola, M, Virtanen, I, Peltonen, L, Olkkonen, VM

J. Mol. Med. 2009
22906437 ORP10, a cholesterol binding protein associated with microtubules, regulates apolipoprotein B-100 secretion

Nissilä, E, Ohsaki, Y, Weber-Boyvat, M, Perttilä, J, Ikonen, E, Olkkonen, VM

Biochim. Biophys. Acta 2012
21220512 A role for oxysterol-binding protein-related protein 5 in endosomal cholesterol trafficking

Du, X, Kumar, J, Ferguson, C, Schulz, TA, Ong, YS, Hong, W, Prinz, WA, Parton, RG, Brown, AJ, Yang, H

J. Cell Biol. 2011
23934110 Interactome map uncovers phosphatidylserine transport by oxysterol-binding proteins

Maeda, K, Anand, K, Chiapparino, A, Kumar, A, Poletto, M, Kaksonen, M, Gavin, AC

Nature 2013
26206935 INTRACELLULAR TRANSPORT. PI4P/phosphatidylserine countertransport at ORP5- and ORP8-mediated ER-plasma membrane contacts

Chung, J, Torta, F, Masai, K, Lucast, L, Czapla, H, Tanner, LB, Narayanaswamy, P, Wenk, MR, Nakatsu, F, De Camilli, P

Science 2015
Participant Of
Catalyst Activity
Catalyst Activity
phospholipid transporter activity of OSBPL5,8,10 [cytosol]
Physical Entity
Orthologous Events
Cite Us!