Myosin II isoform co-assembly and differential regulation in mammalian systems

被引:44
作者
Beach, Jordan R. [1 ]
Hammer, John A., III [1 ]
机构
[1] NHLBI, Cell Biol & Physiol Ctr, NIH, Bethesda, MD 20892 USA
关键词
Nonmuscle myosin II; Isoform; Filament assembly; HEAVY-CHAIN PHOSPHORYLATION; SMOOTH-MUSCLE MYOSIN; LIVE CELLS; A GENE; MIGRATING CELLS; PROTEIN-KINASE; LIVING CELLS; TAIL REGION; LIGHT-CHAIN; IN-VIVO;
D O I
10.1016/j.yexcr.2015.01.012
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Non-muscle myosin 2 (NM2) is a major force-producing, actin-based motor in mammalian nonmuscle cells, where it plays important roles in a broad range of fundamental biological processes, including cytokinesis, cell migration, and epithelial barrier function. This breadth of function at the tissue and cellular levels suggests extensive diversity and differential regulation of NM2 bipolar filaments, the major, if not sole, functional form of NM2s in vivo. Previous in vitro, cellular and animal studies indicate that some of this diversity is supported by the existence of multiple NM2 isoforms. Moreover, two recent studies have shown that these isoforms can co-assemble to form heterotypic filaments, further expanding functional diversity. In addition to isoform co-assembly, cells may differentially regulate NM2 function via isoform-specific expression, RLC phosphorylation, MHC phosphorylation or regulation via binding partners. Here, we provide a brief summary of NM2 filament assembly, summarize the recent findings regarding NM2 isoform co-assembly, consider the mechanisms cells might utilize to differentially regulate NM2 isoforms, and review the data available to support these mechanisms. Published by Elsevier Inc.
引用
收藏
页码:2 / 9
页数:8
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