RGS5

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Regulator of G-protein signaling 5 (RGS5)

Publications[править]

Cardiac myocytes express mRNA for ten RGS proteins: changes in RGS mRNA expression in ventricular myocytes and cultured atria.

Regulators of G-protein signalling (RGS) are recently identified proteins that shorten the lifetime of the activated G protein. We now show that rat cardiac myocytes express mRNA for at least 10 RGS. The mRNA for RGS-r is barely detectable in rat ventricles, but increases more than 20-fold during the 60- to 90-min process of isolating ventricular myocytes, and after 90 min of culture of atrial pieces in medium with Ca2 . Both in myocytes and in atria, the rise in RGS-r is transient. The mRNA for cardiac RGS5, but not RGS-r, is developmentally regulated. These studies suggest that rapid regulation of RGS levels may be a new mechanism that governs how signals are transmitted across the cardiac cell membrane.

MeSH Terms

  • Aging
  • Animals
  • Animals, Newborn
  • Cell Membrane
  • Cells, Cultured
  • Eye Proteins
  • GTP-Binding Proteins
  • GTPase-Activating Proteins
  • Gene Expression Regulation
  • Heart
  • Heart Atria
  • Heart Ventricles
  • Kinetics
  • Myocardium
  • Organ Specificity
  • Protein Biosynthesis
  • Proteins
  • RGS Proteins
  • RNA, Messenger
  • Rats
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction
  • Transcription, Genetic