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Wei F, Wang Y, Yao J, Mei L, Huang X, Kong H, Chen J, Chen X, Liu L, Wang Z, Wang J, Song J, Kong E, Yang A. ZDHHC7-mediated S-palmitoylation of ATG16L1 facilitates LC3 lipidation and autophagosome formation. Autophagy 2024. [PMID: 39087410 DOI: 10.1080/15548627.2024.2386915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/14/2024] [Accepted: 07/29/2024] [Indexed: 08/02/2024] Open
Abstract
Macroautophagy/autophagy is a fundamental cellular catabolic process that delivers cytoplasmic components into double-membrane vesicles called autophagosomes, which then fuse with lysosomes and their contents are degraded. Autophagy recycles cytoplasmic components, including misfolded proteins, dysfunctional organelles and even microbial invaders, thereby playing an essential role in development, immunity and cell death. Autophagosome formation is the main step in autophagy, which is governed by a set of ATG (autophagy related) proteins. ATG16L1 interacts with ATG12-ATG5 conjugate to form an ATG12-ATG5-ATG16L1 complex. The complex acts as a ubiquitin-like E3 ligase that catalyzes the lipidation of MAP1LC3/LC3 (microtubule associated protein 1 light chain 3), which is crucial for autophagosome formation. In the present study, we found that ATG16L1 was subject to S-palmitoylation on cysteine 153, which was catalyzed by ZDHHC7 (zinc finger DHHC-type palmitoyltransferase 7). We observed that re-expressing ATG16L1 but not the S-palmitoylation-deficient mutant ATG16L1C153S rescued a defect in the lipidation of LC3 and the formation of autophagosomes in ATG16L1-KO (knockout) HeLa cells. Furthermore, increasing ATG16L1 S-palmitoylation by ZDHHC7 expression promoted the production of LC3-II, whereas reducing ATG16L1 S-palmitoylation by ZDHHC7 deletion inhibited the LC3 lipidation process and autophagosome formation. Mechanistically, the addition of a hydrophobic 16-carbon palmitoyl group on Cys153 residue of ATG16L1 enhances the formation of ATG16L1-WIPI2B complex and ATG16L1-RAB33B complex on phagophore, thereby facilitating the LC3 lipidation process and autophagosome formation. In conclusion, S-palmitoylation of ATG16L1 is essential for the lipidation process of LC3 and the formation of autophagosomes. Our research uncovers a new regulatory mechanism of ATG16L1 function in autophagy.
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Affiliation(s)
- Fujing Wei
- School of Life Sciences, Chongqing University, Chongqing, China
- Medical Research Institute, Southwest University, Chongqing, China
| | - Yu Wang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Jia Yao
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Ligang Mei
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Xue Huang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Hesheng Kong
- Institute of Psychiatry and Neuroscience, Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Xinxiang Medical University, Xinxiang, China
| | - Jing Chen
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Xiaorong Chen
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Lu Liu
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Zhuolin Wang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Jiaxin Wang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Jiong Song
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Eryan Kong
- Institute of Psychiatry and Neuroscience, Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Xinxiang Medical University, Xinxiang, China
| | - Aimin Yang
- School of Life Sciences, Chongqing University, Chongqing, China
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S Mesquita F, Abrami L, Linder ME, Bamji SX, Dickinson BC, van der Goot FG. Mechanisms and functions of protein S-acylation. Nat Rev Mol Cell Biol 2024; 25:488-509. [PMID: 38355760 DOI: 10.1038/s41580-024-00700-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2024] [Indexed: 02/16/2024]
Abstract
Over the past two decades, protein S-acylation (often referred to as S-palmitoylation) has emerged as an important regulator of vital signalling pathways. S-Acylation is a reversible post-translational modification that involves the attachment of a fatty acid to a protein. Maintenance of the equilibrium between protein S-acylation and deacylation has demonstrated profound effects on various cellular processes, including innate immunity, inflammation, glucose metabolism and fat metabolism, as well as on brain and heart function. This Review provides an overview of current understanding of S-acylation and deacylation enzymes, their spatiotemporal regulation by sophisticated multilayered mechanisms, and their influence on protein function, cellular processes and physiological pathways. Furthermore, we examine how disruptions in protein S-acylation are associated with a broad spectrum of diseases from cancer to autoinflammatory disorders and neurological conditions.
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Affiliation(s)
- Francisco S Mesquita
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Laurence Abrami
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Maurine E Linder
- Department of Molecular Medicine, Cornell University, Ithaca, NY, USA
| | - Shernaz X Bamji
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - F Gisou van der Goot
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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Liu H, Tan R, Tong J, Wen S, Wu C, Rao M, Zhu J, Qi S, Kong E. Palmitoylation is required for Sept8-204 and Sept5 to form vesicle-like structure and colocalize with synaptophysin. J Cell Biochem 2024; 125:e30529. [PMID: 38308620 DOI: 10.1002/jcb.30529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 01/09/2024] [Accepted: 01/24/2024] [Indexed: 02/05/2024]
Abstract
Sept8 is a vesicle associated protein and there are two typical transcriptional variants (Sept8-204 and Sept8-201) expressed in mice brain. Interestingly, the coexpression of Sept8-204/Sept5 induces the formation of small sized vesicle-like structure, while that of the Sept8-201/Sept5 produces large puncta. Sept8 is previously shown to be palmitoylated. Here it was further revealed that protein palmitoylation is required for Sept8-204/Sept5 to maintain small sized vesicle-like structure and colocalize with synaptophysin, since either the expression of nonpalmitoylated Sept8-204 mutant (Sept8-204-3CA) or inhibiting Sept8-204 palmitoylation by 2-BP with Sept5 produces large puncta, which barely colocalizes with synaptophysin (SYP). Moreover, it was shown that the dynamic palmitoylation of Sept8-204 is controlled by ZDHHC17 and PPT1, loss of ZDHHC17 decreases Sept8-204 palmitoylation and induces large puncta, while loss of PPT1 increases Sept8-204 palmitoylation and induces small sized vesicle-like structure. Together, these findings suggest that palmitoylation is essential for the maintenance of the small sized vesicle-like structure for Sept8-204/Sept5, and may hint their important roles in synaptic functions.
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Affiliation(s)
- Huicong Liu
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Rong Tan
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Jia Tong
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Shuo Wen
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Can Wu
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Muding Rao
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Jiangli Zhu
- State Key Laboratory of Biotherapy and Cancer Center, Department of Urology, Sichuan University and National Collaborative Innovation Center, Chengdu, China
| | - Shiqian Qi
- State Key Laboratory of Biotherapy and Cancer Center, Department of Urology, Sichuan University and National Collaborative Innovation Center, Chengdu, China
| | - Eryan Kong
- The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
- Xinxiang Key Laboratory of Protein Palmitoylation and Major Human Diseases, Henan Health Commission Key Laboratory of Gastrointestinal Cancer Prevention and Treatment, Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
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