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Updated: Aug 10, 2025

Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
TMEM164 is an acyltransferase that forms ferroptotic C20:4 ether phospholipids
Alex Reed1, Timothy Ware1, Haoxin Li1
1Department of Chemistry, The Scripps Research Institute, San Diego, CA, USA.
Researchers identified TMEM164 as an enzyme crucial for producing polyunsaturated fatty acid ether phospholipids (PUFA-ePLs), which drive ferroptosis. Its absence selectively reduces PUFA-ePLs, offering variable protection against this cell death pathway.
Area of Science:
- Biochemistry
- Cell Biology
- Oncology
Background:
- Ferroptosis is iron-dependent cell death triggered by oxidized polyunsaturated fatty acid (PUFA) phospholipids.
- Polyunsaturated fatty acid ether phospholipids (PUFA-ePLs) play a key role in ferroptosis, but the enzymes responsible for their production are not fully understood.
Purpose of the Study:
- To identify and characterize the enzyme responsible for PUFA-ePL production.
- To investigate the role of TMEM164 in PUFA-ePL synthesis and its impact on ferroptosis.
Main Methods:
- Pathway mining of genetic dependency maps.
- AlphaFold-guided structure prediction.
- Targeted lipidomics analysis.
- Genetic ablation of TMEM164 in cancer cell lines.
Main Results:
- TMEM164 is a cysteine enzyme that transfers C20:4 acyl chains to produce PUFA-ePLs.
- TMEM164 deletion selectively reduced C20:4 ePLs without significantly affecting C20:4 diacyl phospholipids.
- Loss of TMEM164 conferred variable protection from ferroptosis in cancer cells.
Conclusions:
- TMEM164 is a key enzyme in PUFA-ePL synthesis, directly linking its enzymatic activity to ferroptosis.
- C20:4 ePLs have a context-dependent role in promoting ferroptosis, highlighting their significance in this cell death pathway.
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