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Updated: Jun 30, 2026

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Published on: February 12, 2022
Palmitoylation controls recycling in lysosomal sorting and trafficking
Peter J McCormick1, Karine Dumaresq-Doiron, Anne-Sophie Pluviose
1Laboratory of Cellular Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Palmitoylation is crucial for lysosomal receptors like sortilin and cation-independent mannose 6-phosphate receptor to traffic correctly. This modification ensures their interaction with retromer for efficient recycling and cargo delivery.
Area of Science:
- Cell Biology
- Molecular Biology
- Protein Trafficking
Background:
- Lysosomal proteins require specific trafficking pathways involving mannose 6-phosphate receptors and sortilin.
- Efficient recycling of these receptors from endosomes to the Golgi is mediated by the retromer complex.
Purpose of the Study:
- To investigate the role of palmitoylation in the trafficking of sortilin and cation-independent mannose 6-phosphate receptor.
- To identify the specific palmitoyltransferase involved in this process.
Main Methods:
- Assessing receptor trafficking in palmitoylation-deficient conditions.
- Analyzing receptor interaction with the retromer complex.
- Identifying the responsible palmitoyltransferase using molecular biology techniques.
Main Results:
- Palmitoylation is essential for the efficient retrograde trafficking of sortilin and cation-independent mannose 6-phosphate receptor.
- Palmitoylation-deficient receptors are retained in endosomes.
- Palmitoylation is required for the interaction between receptors and the retromer complex.
- DHHC-15 was identified as the palmitoyltransferase responsible for modifying these receptors.
Conclusions:
- Palmitoylation plays a critical functional role in the sorting and trafficking of lysosomal receptors.
- The modification by DHHC-15 is vital for receptor recycling and proper lysosomal protein delivery.
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