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Regulator of Calcineurin (RCAN-1) Regulates Thermotaxis Behavior in Caenorhabditis elegans.

Abstract
Regulator of calcineurin (RCAN) is a calcineurin-interacting protein that inhibits calcineurin phosphatase when overexpressed, often upregulated under neuropathological conditions with impaired learning and memory processes, such as Down syndrome or Alzheimer's disease. Thermotactic behavior in the nematode Caenorhabditis elegans is a form of memory in which calcineurin signaling plays a pivotal role in the thermosensation of AFD neurons. In this study, we found that rcan-1 deletion mutants exhibited cryophilic behavior dependent on tax-6, which was rescued by expressing rcan-1 in AFD neurons. Interaction between RCAN-1 and TAX-6 requires the conserved PxIxIT motif of RCAN-1, without which thermotactic behavior could not be fully rescued. In addition, the loss of crh-1/CREB suppressed the thermotaxis phenotypes of rcan-1 and tax-6 mutants, indicating that crh-1 is crucial in thermotaxis memory in these mutants. Taken together, our results suggest that rcan-1 is an inhibitory regulator of tax-6 and that it acts in the formation of thermosensory behavioral memory in C. elegans.
AuthorsWeixun Li, Harold W Bell, Joohong Ahnn, Sun-Kyung Lee
JournalJournal of molecular biology (J Mol Biol) Vol. 427 Issue 22 Pg. 3457-3468 (Nov 06 2015) ISSN: 1089-8638 [Electronic] Netherlands
PMID26232604 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
CopyrightCopyright © 2015 Elsevier Ltd. All rights reserved.
Chemical References
  • Caenorhabditis elegans Proteins
  • Calcineurin Inhibitors
  • Calcineurin
  • Calcium
Topics
  • Animals
  • Animals, Genetically Modified (genetics, growth & development, metabolism)
  • Caenorhabditis elegans (genetics, growth & development, metabolism)
  • Caenorhabditis elegans Proteins (genetics, metabolism)
  • Calcineurin (chemistry, genetics, metabolism)
  • Calcineurin Inhibitors (metabolism)
  • Calcium (metabolism)
  • Gene Expression Regulation
  • Locomotion
  • Mutation (genetics)
  • Neurons (metabolism, pathology)
  • Phosphorylation
  • Signal Transduction
  • Thermosensing (physiology)

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