cargo binding domain of fungal myosin V -like proteins
Yeast myosin V travels along actin cables, actin filaments that are bundled by fimbrin, in the presence of tropomyosin. This is in contrast to the other vertebrate class V myosins. Like other class V myosins, fungal myosin 2 and 4 contain a C-terminal cargo binding domain. In case of Myo4 it has been shown to bind to the adapter protein She3p (Swi5p-dependent HO expression 3), which in turn anchors myosin 4 to its cargos, zip-coded mRNP (messenger ribonucleoprotein particles) and tER (tubular endoplasmic reticulum). Myo 2 binds to Vac17, vacuole-specific cargo adaptor, and Mmr1, mitochondria-specific cargo adaptor. Both adaptors bind competitivly at the same site.
Jiyao W et al.(2023). "The conserved domain database in 2023.",