ALKBH4-dependent demethylation of actin regulates actomyosin dynamics.

Article Details


Li MM, Nilsen A, Shi Y, Fusser M, Ding YH, Fu Y, Liu B, Niu Y, Wu YS, Huang CM, Olofsson M, Jin KX, Lv Y, Xu XZ, He C, Dong MQ, Rendtlew Danielsen JM, Klungland A, Yang YG

ALKBH4-dependent demethylation of actin regulates actomyosin dynamics.

Nat Commun. 2013;4:1832. doi: 10.1038/ncomms2863.

PubMed ID
23673617 [ View in PubMed

Regulation of actomyosin dynamics by post-transcriptional modifications in cytoplasmic actin is still poorly understood. Here we demonstrate that dioxygenase ALKBH4-mediated demethylation of a monomethylated site in actin (K84me1) regulates actin-myosin interaction and actomyosin-dependent processes such as cytokinesis and cell migration. ALKBH4-deficient cells display elevated K84me1 levels. Non-muscle myosin II only interacts with unmethylated actin and its proper recruitment to and interaction with actin depend on ALKBH4. ALKBH4 co-localizes with the actomyosin-based contractile ring and midbody via association with methylated actin. ALKBH4-mediated regulation of actomyosin dynamics is completely dependent on its catalytic activity. Disorganization of cleavage furrow components and multinucleation associated with ALKBH4 deficiency can all be restored by reconstitution with wild-type but not catalytically inactive ALKBH4. Similar to actin and myosin knock-out mice, homozygous Alkbh4 mutant mice display early embryonic lethality. These findings imply that ALKBH4-dependent actin demethylation regulates actomyosin function by promoting actin-non-muscle myosin II interaction.

DrugBank Data that Cites this Article

NameUniProt ID
Actin, alpha skeletal muscleP68133Details
Actin, cytoplasmic 1P60709Details
Actin, cytoplasmic 2P63261Details