Open AccessIdentification of three developmentally controlled isoforms of human myosin heavy chains
Author(s) -
BOBER Eva,
BUCHBERGERSEIDL Astrid,
BRAUN Thomas,
SINGH Surjit,
GOEDDE Heinz Werner,
ARNOLD Hans Henning
Publication year - 1990
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1990.tb15459.x
Subject(s) - myosin , gene isoform , identification (biology) , heavy chain , computational biology , microbiology and biotechnology , chemistry , biology , biochemistry , ecology , gene
A set of cDNA clones coding for myosin heavy chains (MHC) was isolated from a human fetal skeletal muscle library. We have demonstrated by restriction mapping and nucleotide sequence analysis that the cDNAs represent three distinct transcripts, presumably the products of different genes. Furthermore, the pattern of mRNA expression indicates that the corresponding genes are regulated in a tissue‐specific and developmental‐stage‐specific manner. While the cDNA clone gtMHC‐V exhibits extensive sequence similarity to the rat β‐myosin heavy chain, the two other clones, gtMHC‐F and gtMHC‐E are very similar to the rat genes encoding the perinatal and embryonic myosin heavy chains, respectively. The mRNA corresponding to clone gt‐MHC‐V is highly expressed in heart and adult fast skeletal muscle and to a lesser extent in fetal skeletal muscle and adult slow skeletal muscle. The mRNAs corresponding to clones gtMHC‐F and gtMHC‐E are abundantly present in fetal skeletal muscle and are not present or barely detectable in heart and adult skeletal muscle.