TECPR1 conjugates LC3 to damaged endomembranes upon detection of sphingomyelin exposure.
TECPR1 conjugates LC3 to damaged endomembranes upon detection of sphingomyelin exposure.
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DOI:
10.15252/embj.2022113012
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发表时间:
2023-09-04
期刊:
影响因子:
11.4
通讯作者:
Randow, Felix
中科院分区:
文献类型:
--
作者:
Boyle, Keith B.;Ellison, Cara J.;Elliott, Paul R.;Schuschnig, Martina;Grimes, Krista;Dionne, Marc S.;Sasakawa, Chihiro;Munro, Sean;Martens, Sascha;Randow, Felix
Invasive bacteria enter the cytosol of host cells through initial uptake into bacteria‐containing vacuoles (BCVs) and subsequent rupture of the BCV membrane, thereby exposing to the cytosol intraluminal, otherwise shielded danger signals such as glycans and sphingomyelin. The detection of glycans by galectin‐8 triggers anti‐bacterial autophagy, but how cells sense and respond to cytosolically exposed sphingomyelin remains unknown. Here, we identify TECPR1 (tectonin beta‐propeller repeat containing 1) as a receptor for cytosolically exposed sphingomyelin, which recruits ATG5 into an E3 ligase complex that mediates lipid conjugation of LC3 independently of ATG16L1. TECPR1 binds sphingomyelin through its N‐terminal DysF domain (N'DysF), a feature not shared by other mammalian DysF domains. Solving the crystal structure of N'DysF, we identified key residues required for the interaction, including a solvent‐exposed tryptophan (W154) essential for binding to sphingomyelin‐positive membranes and the conjugation of LC3 to lipids. Specificity of the ATG5/ATG12‐E3 ligase responsible for the conjugation of LC3 is therefore conferred by interchangeable receptor subunits, that is, the canonical ATG16L1 and the sphingomyelin‐specific TECPR1, in an arrangement reminiscent of certain multi‐subunit ubiquitin E3 ligases. TECPR1 detects cytosolically‐exposed sphingomyelin and recruits ATG5/ATG12‐E3 ligase to damaged membranes to mediate lipid conjugation of LC3 independently of ATG16L.
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DOI:
10.1083/jcb.202009128
发表时间:
2020-12-07
期刊:
The Journal of cell biology
影响因子:
--
作者:
Fischer TD;Wang C;Padman BS;Lazarou M;Youle RJ
通讯作者:
Youle RJ
DOI:
10.1007/978-1-4939-8873-0_45
发表时间:
2019-01-01
期刊:
AUTOPHAGY: METHODS AND PROTOCOLS
影响因子:
--
作者:
Boyle, Keith B.;Randow, Felix
通讯作者:
Randow, Felix
DOI:
10.1038/nri.2016.100
发表时间:
2016-11
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
Cadwell K
通讯作者:
Cadwell K
影响因子:
9.2
作者:
Ellison, Cara J.;Kukulski, Wanda;Randow, Felix
通讯作者:
Randow, Felix
影响因子:
3.7
作者:
通讯作者:
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