Two distinct nonmuscle myosin‐heavy‐chain mRNAs are differentially expressed in various chicken tissues: Identification of a novel gene family of vertebrate non‐sarcomeric myosin heavy chains

Y. Katsuragawa, Masashi Yanagisawa, A. Inoue, T. Masaki

Research output: Contribution to journalArticle

111 Scopus citations

Abstract

Two distinct cDNA clones for nonmuscle myosin heavy chain (MHC) were isolated from a chicken fibroblast cDNA library by cross‐hydridization under a moderate stringency with chicken gizzard smooth muscle MHC cDNA. These two fibroblast MHC and the gizzard MHC are each encoded in different genes in the chicken genome. Northern blot analysis showed that both of the nonmuscle MHC mRNAs were expressed not only in fibroblasts but also in a variety of tissues including brain, lung, kidney, spleen, and skeletal, cardiac and smooth muscles. However, the relative contents of the two nonmuscle MHC mRNAs varied greatly among tissues. The encoded amino acid sequences of the nonmuscle MHCs were highly similar to each other (81% identity) and to the smooth muscle MHC (81–84%), but much less similar to vertebrate skeletal muscle MHCs (38–41%) or to protista nonmuscle MHCs (35–36%). A phylogenic tree of MHC isoforms was constructed by calculating the similarity scores between these MHC sequences. An examination of the tree showed that the vertebrate sarcomeric (skeletal and cardiac) MHC isoforms are encoded in a very closely related multigene family, and that the vertebrate non‐sarcomeric (smooth muscle and nonmuscle) MHC isoforms define a distinct, less conserved MHC gene family.

Original languageEnglish (US)
Pages (from-to)611-616
Number of pages6
JournalEuropean Journal of Biochemistry
Volume184
Issue number3
DOIs
StatePublished - Oct 1989

ASJC Scopus subject areas

  • Biochemistry

Fingerprint Dive into the research topics of 'Two distinct nonmuscle myosin‐heavy‐chain mRNAs are differentially expressed in various chicken tissues: Identification of a novel gene family of vertebrate non‐sarcomeric myosin heavy chains'. Together they form a unique fingerprint.

  • Cite this