The diversity of cellular phospholipids, crucial for membrane homeostasis and function, arises from enzymatic remodeling of their fatty acyl chains. In this work, we reveal that poorly understood TRAM-LAG1-CLN8 domain (TLCD)-containing proteins are phospholipid remodeling enzymes. We demonstrate that TLCD1 is an evolutionarily conserved lysophosphatidylethanolamine acyltransferase, which regulates cellular phospholipid composition and generates previously undescribed fatty acid and thiamine (vitamin B1) esters as its secondary products. Furthermore, we establish that human TLCD protein CLN8, mutations of which cause fatal neurodegenerative Batten disease, is a lysophosphatidylglycerol acyltransferase. We show that CLN8 catalyzes the essential step in the biosynthesis of bis(monoacylglycero)phosphate, a phospholipid critical for lysosome function. Our study unveils a family of acyltransferases integral to cellular membrane phospholipid homeostasis and human disease.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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| Evidence ID | Analyze ID | File | Description |
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