An SPNS1-dependent lysosomal lipid transport pathway that enables cell survival under choline limitation.
An SPNS1-dependent lysosomal lipid transport pathway that enables cell survival under choline limitation.
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DOI:
10.1126/sciadv.adf8966
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发表时间:
2023-04-21
期刊:
影响因子:
13.6
通讯作者:
Abu-Remaileh, Monther
中科院分区:
文献类型:
--
作者:
Scharenberg, Samantha G.;Dong, Wentao;Ghoochani, Ali;Nyame, Kwamina;Levin-Konigsberg, Roni;Krishnan, Aswini R.;Rawat, Eshaan S.;Spees, Kaitlyn;Bassik, Michael C.;Abu-Remaileh, Monther
Lysosomes degrade macromolecules and recycle their nutrient content to support cell function and survival. However, the machineries involved in lysosomal recycling of many nutrients remain to be discovered, with a notable example being choline, an essential metabolite liberated via lipid degradation. Here, we engineered metabolic dependency on lysosome-derived choline in pancreatic cancer cells to perform an endolysosome-focused CRISPR-Cas9 screen for genes mediating lysosomal choline recycling. We identified the orphan lysosomal transmembrane protein SPNS1 as critical for cell survival under choline limitation. SPNS1 loss leads to intralysosomal accumulation of lysophosphatidylcholine (LPC) and lysophosphatidylethanolamine (LPE). Mechanistically, we reveal that SPNS1 is a proton gradient–dependent transporter of LPC species from the lysosome for their re-esterification into phosphatidylcholine in the cytosol. Last, we establish that LPC efflux by SPNS1 is required for cell survival under choline limitation. Collectively, our work defines a lysosomal phospholipid salvage pathway that is essential under nutrient limitation and, more broadly, provides a robust platform to deorphan lysosomal gene function. A lysosomal pathway for lipid salvage that relies on SPNS1-mediated lysophospholipid transport is vital during nutrient scarcity.
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影响因子:
64.8
作者:
Laqtom NN;Dong W;Medoh UN;Cangelosi AL;Dharamdasani V;Chan SH;Kunchok T;Lewis CA;Heinze I;Tang R;Grimm C;Dang Do AN;Porter FD;Ori A;Sabatini DM;Abu-Remaileh M
通讯作者:
Abu-Remaileh M
影响因子:
--
作者:
Inde Z;Rodencal J;Dixon SJ
通讯作者:
Dixon SJ
影响因子:
11.8
作者:
Edinger, AL;Cinalli, RM;Thompson, CB
通讯作者:
Thompson, CB
影响因子:
4.6
作者:
Calvano, Cosima Damiana;Bianco, Mariachiara;Cataldi, Tommaso R., I
通讯作者:
Cataldi, Tommaso R., I
DOI:
10.1073/pnas.87.10.3861
发表时间:
1990-05-01
影响因子:
11.1
作者:
CATALDO, AM;NIXON, RA
通讯作者:
NIXON, RA