Fast skeletal muscle myosin heavy chain gene cluster of medaka Oryzias latipes enrolled in temperature adaptation

Chun Shi Liang, Atsushi Kobiyama, Atsushi Shimizu, Takashi Sasaki, Shuichi Asakawa, Nobuyoshi Shimizu, Shugo Watabe

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

To disclose mechanisms involved in temperature acclimation of fish muscle, we subjected eurythermal fish of medaka Oryzias latipes to cloning of myosin heavy chain genes (MYHs). We cloned cDNAs encoding fast skeletal muscle myosin heavy chain (MYH) isoforms from cDNA libraries of medaka acclimated to 10 and 30°C and observed that different MYH cDNA clones are expressed in the two temperature-acclimated fish. Subsequently, we isolated several overlapping MYH contigs by shotgun cloning strategy from a medaka genomic library. Contig assembly of the complete medaka MYH (mMYH) locus of 219 kbp revealed a cluster of tandemly arrayed 11 mMYHs, in which eight genes are actually transcribed, with the remaining three being pseudogenes. Expression analysis of the transcribed genes revealed that two genes were each highly expressed in medaka acclimated to 10 and 30°C, whereas comparatively lower expression levels of the three genes were exclusively observed in medaka acclimated to 30°C. cDNAs of the remaining genes were too underrepresented in the libraries to determine the expression levels, and the transcripts could only be obtained by reverse transcription-polymerase chain reaction. Deduced amino acid sequences in the loop 1 and loop 2 regions of mMYHs were highly variable, suggesting that these isoforms were functionally different. The present findings consolidate our knowledge on teleost MYH multigene family and would provide further insight into the mechanisms by which expressions of individual MYH molecules are fine-tuned with environmental temperature fluctuations with further functional analysis of the genes concerned.

Original languageEnglish
Pages (from-to)201-214
Number of pages14
JournalPhysiological Genomics
Volume29
Issue number2
DOIs
Publication statusPublished - 2007 Apr 24

Fingerprint

Skeletal Muscle Myosins
Oryzias
Myosin Heavy Chains
Multigene Family
Temperature
Genes
Fishes
Complementary DNA
Organism Cloning
Protein Isoforms
Pseudogenes
Genomic Library
Acclimatization
Firearms
Gene Library
Libraries
Reverse Transcription
Amino Acid Sequence
Clone Cells
Muscles

Keywords

  • cDNA library
  • Genomic bacterial artificial chromosome library
  • Myofibrillar Mg-ATPase activity
  • Temperature acclimation

ASJC Scopus subject areas

  • Physiology
  • Genetics

Cite this

Fast skeletal muscle myosin heavy chain gene cluster of medaka Oryzias latipes enrolled in temperature adaptation. / Liang, Chun Shi; Kobiyama, Atsushi; Shimizu, Atsushi; Sasaki, Takashi; Asakawa, Shuichi; Shimizu, Nobuyoshi; Watabe, Shugo.

In: Physiological Genomics, Vol. 29, No. 2, 24.04.2007, p. 201-214.

Research output: Contribution to journalArticle

Liang, Chun Shi ; Kobiyama, Atsushi ; Shimizu, Atsushi ; Sasaki, Takashi ; Asakawa, Shuichi ; Shimizu, Nobuyoshi ; Watabe, Shugo. / Fast skeletal muscle myosin heavy chain gene cluster of medaka Oryzias latipes enrolled in temperature adaptation. In: Physiological Genomics. 2007 ; Vol. 29, No. 2. pp. 201-214.
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