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ZFIN ID: ZDB-PUB-090921-14
A Comparative Study of Ryanodine Receptor (RyR) Gene Expression Levels in a Basal Ray-Finned Fish, Bichir (Polypterus ornatipinnis) and the Derived Euteleost Zebrafish (Danio rerio)
Darbandi, S., and Franck, J.P.
Date: 2009
Source: Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology   154(4): 443-448 (Journal)
Registered Authors: Franck, Jens
Keywords: Ryanodine receptor, Genome duplication, qRT-PCR, Molecular evolution, Gene expression
MeSH Terms:
  • Amino Acid Sequence
  • Animals
  • Evolution, Molecular
  • Excitation Contraction Coupling
  • Fishes/genetics*
  • Fishes/physiology
  • Gene Expression Regulation*
  • Humans
  • Mice
  • Molecular Sequence Data
  • Phylogeny
  • Ryanodine Receptor Calcium Release Channel/chemistry
  • Ryanodine Receptor Calcium Release Channel/genetics*
  • Zebrafish/genetics*
  • Zebrafish/physiology
  • Zebrafish Proteins/chemistry
  • Zebrafish Proteins/genetics*
PubMed: 19755169 Full text @ Comp. Biochem. Physiol. B Biochem. Mol. Biol.
Ryanodine receptors (RyRs) are large homotetrameric protein complexes that mediate the release of intracellular stores of calcium. Mammals possess three gene copies, RyR1, RyR2, and RyR3 that are expressed in a variety of tissue types. Teleost fish express RyR1a and RyR1b genes that are expressed in slow twitch skeletal muscle and fast twitch skeletal muscles respectively. Here we report the results of a survey of the genome of bichir (Polypterus ornatipinnis), considered the most basal ray-finned fish, for its RyR genes. The bichir genome encodes four RyR genes, RyR1a, RyR1b, RyR2, and RyR3 that phylogenetically cluster with their vertebrate orthologs. Quantitative real time PCR shows fibre type-specific expression of the RyR1a and RyR1b genes. The RyR3 gene, however, is down regulated in bichir in contrast to derived teleosts including zebrafish in which the RyR1 and RyR3 genes are co-expressed at equivalent levels.