Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca2+/CaM Controls DCV Binding and Liprin-α/TANC2 Recruits DCVs to Postsynaptic Sites

0301 basic medicine calmodulin QH301-705.5 Dendritic Spines General Biochemistry,Genetics and Molecular Biology Kinesins Nerve Tissue Proteins scaffold TANC2 Article 03 medical and health sciences Calmodulin synapse Animals Humans Biology (General) Rats, Wistar KIF1A Adaptor Proteins, Signal Transducing 0303 health sciences calcium liprin-α Secretory Vesicles Intracellular Signaling Peptides and Proteins dendritic spines neuron 3. Good health HEK293 Cells transport Mutation Synapses Calcium Protein Binding
DOI: 10.1016/j.celrep.2018.06.071 Publication Date: 2018-07-17T14:45:48Z
ABSTRACT
Tight regulation of neuronal transport allows for cargo binding and release at specific cellular locations. The mechanisms by which motor proteins are loaded on vesicles and how cargoes are captured at appropriate sites remain unclear. To better understand how KIF1A-driven dense core vesicle (DCV) transport is regulated, we identified the KIF1A interactome and focused on three binding partners, the calcium binding protein calmodulin (CaM) and two synaptic scaffolding proteins: liprin-α and TANC2. We showed that calcium, acting via CaM, enhances KIF1A binding to DCVs and increases vesicle motility. In contrast, liprin-α and TANC2 are not part of the KIF1A-cargo complex but capture DCVs at dendritic spines. Furthermore, we found that specific TANC2 mutations-reported in patients with different neuropsychiatric disorders-abolish the interaction with KIF1A. We propose a model in which Ca2+/CaM regulates cargo binding and liprin-α and TANC2 recruit KIF1A-transported vesicles.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (58)
CITATIONS (65)