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A MAST-have for neurodevelopment
Sep 18, 2026
Mega corpus callosum (MCC) syndrome, a rare neurodevelopmental disorder, is associated with mutations in the serine/threonine kinase MAST1, a signaling protein expressed in the brain. However, next to nothing is known about MAST1. In a new PNAS study, first author Sumire Antonioli from the Leonard lab has identified previously unknown components of the signaling cascade and characterized how disease-associated mutations alter MAST1 function. The findings suggest that MAST1 may link actin and microtubule cytoskeleton dynamics during neuronal development.