Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.
Cancer Research UK Beatson Institute and Institute of Cancer Sciences, University of Glasgow, Glasgow, UK.
J Cell Biol. 2021 Aug 2;220(8). doi: 10.1083/jcb.202106176. Epub 2021 Jul 15.
The ARP2/3 complex promotes branched actin networks, but the importance of specific subunit isoforms is unclear. In this issue, Galloni, Carra, et al. (2021. J. Cell Biol. https://doi.org/10.1083/jcb.202102043) show that MICAL2 mediates methionine oxidation of ARP3B, thus destabilizing ARP2/3 complexes and leading to disassembly of branched actin filaments.
ARP2/3 复合物促进分支状肌动蛋白网络的形成,但特定亚基同工型的重要性尚不清楚。在本期杂志中,Galloni、Carra 等人(2021. J. Cell Biol. https://doi.org/10.1083/jcb.202102043)表明,MICAL2 介导 ARP3B 的蛋氨酸氧化,从而破坏 ARP2/3 复合物并导致分支肌动蛋白丝的解体。