Delaying the final cut: A close encounter of checkpoint kinases at the midbody

Abstract

How chromatin bridges are relayed to the chromosomal passenger complex (CPC) during mammalian cell division is unknown. In this issue, Petsalaki and Zachos (2020. J. Cell Biol.https://doi.org/10.1083/jcb.202008029) show that the DNA damage checkpoint kinases ATM and Chk2 signal to the CPC to associate with a pool of cytoskeletal regulators, MKLP2-Cep55, in the midbody center and to delay abscission.