Neuronal calmodulin levels are controlled by CAMTA transcription factors.

ABSTRACT: The ubiquitous Ca²⁺ sensor calmodulin (CaM) binds and regulates many proteins, including ion channels, CaM kinases, and calcineurin, according to Ca²⁺-CaM levels. What regulates neuronal CaM levels, is, however, unclear. CaM-binding transcription activators (CAMTAs) are ancient proteins expressed broadly in nervous systems and whose loss confers pleiotropic behavioral defects in flies, mice, and humans. Using Caenorhabditis elegans and Drosophila, we show that CAMTAs control neuronal CaM levels. The behavioral and neuronal Ca²⁺ signaling defects in mutants lacking camt-1, the sole C. elegans CAMTA, can be rescued by supplementing neuronal CaM. CAMT-1 binds multiple sites in the CaM promoter and deleting these sites phenocopies

SUBMITTER: Vuong-Brender TT 

PROVIDER: S-EPMC8428840 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature