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A CaMK cascade activates CRE-mediated transcription in neurons of Caenorhabditis elegans

Yoshishige Kimura1, Ethan E Corcoran, Koh Eto

  • 1Department of Functional Genomics, Medical Research Institute, Tokyo Medical and Dental University, Japan.

EMBO Reports
|September 17, 2002
PubMed

Insights

Calcium (Ca2+) signals and calmodulin (CaM) regulate cellular functions. A Ca2+/CaM-dependent protein kinase cascade controls cyclic AMP response element binding protein (CREB) transcription in specific head neurons of C. elegans.

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Molecular Biology

Background:

  • Calcium (Ca2+) signals are crucial for diverse cellular functions, including neuronal activity.
  • Calmodulin (CaM) acts as a ubiquitous Ca2+ sensor, modulating enzyme activities.
  • Ca2+/CaM-dependent protein kinases (CaMKs) are involved in intraneuronal signaling and synaptic plasticity.

Purpose of the Study:

  • To investigate the role of the CaMK cascade in regulating CREB-mediated transcription in Caenorhabditis elegans.
  • To determine if the components of the CaMK pathway are coexpressed in C. elegans head neurons.

Main Methods:

  • Utilized a transgenic approach in C. elegans.
  • Visualized CREB-dependent transcription in vivo.
  • Examined the coexpression of CaMK pathway components in head neurons.

Main Results:

  • All components of the CaMK cascade, including CaMKI, CaMKIV, and CaMKK, are coexpressed in C. elegans head neurons.
  • The CaMK cascade was shown to regulate CRE-mediated transcription in a subset of these neurons.
  • This regulation occurs in living nematodes, demonstrating in vivo function.

Conclusions:

  • The CaMK cascade plays a significant role in regulating CREB-mediated transcription in specific C. elegans head neurons.
  • This finding extends the understanding of calcium signaling pathways in neuronal gene regulation.
  • The study highlights the conserved nature of this signaling pathway across species.

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