Force-modulated structural landscape of the catch bonding F-actin crosslinker α-actinin-4
Alfred C. Chin, Fatemah Mukadum, Matthew J. Reynolds…·Gregory M. Alushin
This study uses cryo-EM and myosin motors to show that wild-type α-actinin-4 forms two binding states with F-actin, while the K255E variant only forms strong bonds, revealing a force-induced transition mechanism for catch bonding.