Key result
Structural analysis of the cargo-binding domains of human Myosin Va, Vb, and Vc revealed structural changes driving functional differentiation and a novel redox mechanism controlling dimerization.
The study provides high-resolution structural insights into the cargo-binding domains of human Myosin V motors, elucidating mechanisms of cargo transport, autoinhibition, and regulation.
May guide future motor protein research; leaves open any cardiovascular relevance or therapeutic translation.
Myosin V (MyoV) motors have been implicated in the intracellular transport of diverse cargoes including vesicles, organelles, RNA-protein complexes, and regulatory proteins. Here, we have solved the cargo-binding domain (CBD) structures of the three human MyoV paralogs (Va, Vb, and Vc), revealing subtle structural changes that drive functional differentiation and a novel redox mechanism controlling the CBD dimerization process, which is unique for the MyoVc subclass. Moreover, the cargo- and motor-binding sites were structurally assigned, indicating the conservation of residues involved in the recognition of adaptors for peroxisome transport and providing high resolution insights into motor domain inhibition by CBD. These results contribute to understanding the structural requirements for cargo transport, autoinhibition, and regulatory mechanisms in myosin V motors.
No takes yet. Share an insight, caveat, or question.
Nascimento et al. (2013) studied this question. Structural analysis of the cargo-binding domains of human Myosin Va, Vb, and Vc revealed structural changes driving functional differentiation and a novel redox mechanism controlling dimerization.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: