MAP1S, encoded by the [MAP1S](/genes/map1s) gene, is a microtubule-associated protein that plays unique roles in linking microtubule function to [autophagy](/entities/autophagy). Unlike other MAP1 family members (MAP1A, MAP1B), MAP1S is a compact protein that directly interacts with LC3 (microtubule-associated protein 1A/1B light chain 3), connecting autophagy to the microtubule cytoskeleton. This makes MAP1S particularly important for cellular quality control processes that are critical in neurodegenerative diseases [1][@xie2015].
Interactions with other autophagy proteins [@auto_21262964]
Normal Function
Microtubule Function
MAP1S supports microtubule-based processes:
Microtubule stabilization: Binds and stabilizes microtubules
Intracellular transport: Facilitates vesicle and organelle movement
Cell division: Supports mitotic spindle function
Autophagy Regulation
MAP1S is a key autophagy regulator:
Autophagosome formation:
Recruits autophagy machinery to microtubules
Facilitates LC3 lipidation
Promotes autophagosome biogenesis
...
MAP1S Protein
Introduction
MAP1S, encoded by the [MAP1S](/genes/map1s) gene, is a microtubule-associated protein that plays unique roles in linking microtubule function to [autophagy](/entities/autophagy). Unlike other MAP1 family members (MAP1A, MAP1B), MAP1S is a compact protein that directly interacts with LC3 (microtubule-associated protein 1A/1B light chain 3), connecting autophagy to the microtubule cytoskeleton. This makes MAP1S particularly important for cellular quality control processes that are critical in neurodegenerative diseases [1][@xie2015].