ORP5 and ORP8 bind phosphatidylinositol-4, 5-biphosphate (PtdIns(4,5)P (2)) and regulate its level at the plasma membrane.
ORP5 and ORP8 bind phosphatidylinositol-4, 5-biphosphate (PtdIns(4,5)P (2)) and regulate its level at the plasma membrane.
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DOI:
10.1038/s41467-017-00861-5
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发表时间:
2017-10-02
影响因子:
16.6
通讯作者:
Yang H
中科院分区:
文献类型:
--
作者:
Ghai R;Du X;Wang H;Dong J;Ferguson C;Brown AJ;Parton RG;Wu JW;Yang H
ORP5 and ORP8, members of the oxysterol-binding protein (OSBP)-related proteins (ORP) family, are endoplasmic reticulum membrane proteins implicated in lipid trafficking. ORP5 and ORP8 are reported to localize to endoplasmic reticulum–plasma membrane junctions via binding to phosphatidylinositol-4-phosphate (PtdIns(4)P), and act as a PtdIns(4)P/phosphatidylserine counter exchanger between the endoplasmic reticulum and plasma membrane. Here we provide evidence that the pleckstrin homology domain of ORP5/8 via PtdIns(4,5)P 2, and not PtdIns(4)P binding mediates the recruitment of ORP5/8 to endoplasmic reticulum–plasma membrane contact sites. The OSBP-related domain of ORP8 can extract and transport multiple phosphoinositides in vitro, and knocking down both ORP5 and ORP8 in cells increases the plasma membrane level of PtdIns(4,5)P 2 with little effect on PtdIns(4)P. Overall, our data show, for the first time, that phosphoinositides other than PtdIns(4)P can also serve as co-exchangers for the transport of cargo lipids by ORPs. ORP5/8 are endoplasmic reticulum (ER) membrane proteins implicated in lipid trafficking that localize to ER-plasma membrane (PM) contacts and maintain membrane homeostasis. Here the authors show that PtdIns(4,5)P 2 plays a critical role in the targeting and function of ORP5/8 at the PM.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Evans PR
通讯作者:
Evans PR
影响因子:
64.5
作者:
Giordano F;Saheki Y;Idevall-Hagren O;Colombo SF;Pirruccello M;Milosevic I;Gracheva EO;Bagriantsev SN;Borgese N;De Camilli P
通讯作者:
De Camilli P
DOI:
10.1016/j.bbalip.2016.01.020
发表时间:
2016-08
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Eden ER
通讯作者:
Eden ER
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1126/science.aab1370
发表时间:
2015-07-24
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Chung J;Torta F;Masai K;Lucast L;Czapla H;Tanner LB;Narayanaswamy P;Wenk MR;Nakatsu F;De Camilli P
通讯作者:
De Camilli P