FEATURES

FAMILY

DESCRIPTION

Also known as MLP3B_HUMAN, MAP1LC3B, MAP1ALC3. Ubiquitin-like modifier involved in formation of autophagosomal vacuoles (autophagosomes). Plays a role in mitophagy which contributes to regulate mitochondrial quantity and quality by eliminating the mitochondria to a basal level to fulfill cellular energy requirements and preventing excess ROS production (PubMed:28017329). In response to cellular stress and upon mitochondria fission, binds C-18 ceramides and anchors autophagolysosomes to outer mitochondrial membranes to eliminate damaged mitochondria (PubMed:22922758). While LC3s are involved in elongation of the phagophore membrane, the GABARAP/GATE-16 subfamily is essential for a later stage in autophagosome maturation. Promotes primary ciliogenesis by removing OFD1 from centriolar satellites via the autophagic pathway. Through its interaction with the reticulophagy receptor TEX264, participates in the remodeling of subdomains of the endoplasmic reticulum into autophagosomes upon nutrient stress, which then fuse with lysosomes for endoplasmic reticulum turnover (PubMed:31006538, PubMed:31006537). 3 different light chains, LC1, LC2 and LC3, can associate with MAP1A and MAP1B proteins (By similarity). Interacts at microtubules with CABP1 (via EF-hands 1 and 2) but not with calmodulin (PubMed:15095872). Interacts with FYCO1 (via C-terminus) (PubMed:20100911, PubMed:24089205). Interacts with TP53INP1 and TP53INP2 (PubMed:22470510). Interacts with TBC1D25 (PubMed:21383079). Directly interacts with SQSTM1; this interaction leads to MAP1LC3B recruitment to inclusion bodies containing polyubiquitinated protein aggregates and to inclusion body degradation by autophagy (PubMed:17580304, PubMed:24089205, PubMed:24668264, PubMed:18524774). Interacts with ATG4B, MAPK15 and BNIP3 (PubMed:22948227, PubMed:23209295). Interacts with MAPB1, KEAP1, PCM1, OFD1, CEP131, and TECPR2 (PubMed:20562859, PubMed:24089205). Interacts with TBC1D5 (PubMed:22354992). Found in a complex with UBQLN1 and UBQLN2 (PubMed:20529957). Interacts with UBQLN4 (via STI1 1 and 2 domains). Interacts with UBQLN1 in the presence of UBQLN4 (PubMed:23459205). Interacts with ATG13 (PubMed:24290141). Interacts with RETREG2, RETREG1 and RETREG3 (PubMed:26040720). No interaction, or very weak, with WDFY3 (PubMed:24668264). Interacts with PLCL1; the interaction inhibits autophagosome formation (By similarity). Interacts with TRIM16 (PubMed:30143514). Interacts with CRY1 and PER2 (By similarity). Interacts with the reticulophagy receptor TEX264 (PubMed:31006538, PubMed:31006537). Membrane-bound form LC3-II interacts with PHB and PHB2; the interaction takes place upon Parkin-mediated mitochondrial damage (PubMed:28017329). Interacts with PJVK; the interaction is direct (By similarity). Interacts with KBTBD6 and KBTBD7; the interaction is direct (PubMed:25684205). Interacts with AMBRA1 (via LIR motif) (PubMed:25215947).

EXTERNAL LINKS

MAP1LC3B

Microtubule-associated proteins 1A/1B light chain 3B

MAP1LC3B

Molecular Synopsis