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Protein-coding gene in the species Homo sapiens
Microtubule-associated proteins 1A/1B light chain 3A is a protein that in humans is encoded by the MAP1LC3A gene .[ 5] [ 6] [ 7] Two transcript variants encoding different isoforms have been found for this gene.
MAP1A and MAP1B are microtubule -associated proteins which mediate the physical interactions between microtubules and components of the cytoskeleton . MAP1A and MAP1B each consist of a heavy chain subunit and multiple light chain subunits. The protein encoded by this gene is one of the light chain subunits and can associate with either MAP1A or MAP1B.[ 7]
MAPLC3A is one of the mammalian homologues of yeast ATG8 , an important marker and effector of autophagy .[ 8]
MAP1LC3A is regulated by several post-translational modifications . These include covalent linkage of the C-terminus to phosphatidylethanolamine in autophagic membranes, and phosphorylation by protein kinase A ,[ 9] which downregulates its autophagy functions. Noncovalent interactions are important for its cargo targeting functions in selective autophagy. For example, it has been shown to interact with sequestosome 1 .[ 10]
^ a b c GRCh38: Ensembl release 89: ENSG00000101460 – Ensembl , May 2017
^ a b c GRCm38: Ensembl release 89: ENSMUSG00000027602 – Ensembl , May 2017
^ "Human PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .
^ "Mouse PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .
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^ Pankiv S, Clausen TH, Lamark T, Brech A, Bruun JA, Outzen H, Overvatn A, Bjorkoy G, Johansen T (Aug 2007). "p62/SQSTM1 binds directly to Atg8/LC3 to facilitate degradation of ubiquitinated protein aggregates by autophagy" . J Biol Chem . 282 (33): 24131–45. doi :10.1074/jbc.M702824200 . PMID 17580304 .
^ a b "Entrez Gene: MAP1LC3A microtubule-associated protein 1 light chain 3 alpha" .
^ Valente G, Morani F, Nicotra G, Fusco N, Peracchio C, Titone R, Alabiso O, Arisio R, Katsaros D, Benedetto C, Isidoro C (2014). "Expression and clinical significance of the autophagy proteins BECLIN 1 and LC3 in ovarian cancer" . Biomed Res Int . 2014 : 462658. doi :10.1155/2014/462658 . PMC 4127242 . PMID 25136588 .
^ Cherra SJ, Kulich SM, Uechi G, Balasubramani M, Mountzouris J, Day BW, Chu CT (August 2010). "Regulation of the autophagy protein LC3 by phosphorylation" . J. Cell Biol . 190 (4): 533–9. doi :10.1083/jcb.201002108 . PMC 2928022 . PMID 20713600 .
^ Shvets E, Fass E, Scherz-Shouval R, Elazar Z (August 2008). "The N-terminus and Phe52 residue of LC3 recruit p62/SQSTM1 into autophagosomes" . J. Cell Sci . 121 (Pt 16): 2685–95. doi :10.1242/jcs.026005 . PMID 18653543 .
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