The carboxyl terminus of the smooth muscle myosin light chain kinase is expressed as an independent protein, telokin

Patricia Gallagher, B. Herring

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

It has been proposed that the carboxyl terminus of the smooth muscle myosin light chain kinase is expressed as an independent protein. This protein has been purified from tissues and named telokin (Ito, M., Dabrowska, R., Guerriero, V., Jr., and Hartshorne, D. J. (1989) J. Biol. Chem. 264, 13971-13974). In this study we have isolated and characterized cDNA and genomic clones encoding telokin. Analysis of a genomic DNA clone suggests that the mRNA encoding telokin arises from a promoter which appears to be located within an intron of the smooth muscle myosin light chain kinase (MLCK) gene. This intron interrupts exons encoding the calmodulin binding domain of the kinase. The amino acid sequence deduced from the cDNA predicts that telokin is identical to the carboxyl-terminal 155 residues of the smooth muscle MLCK. Unlike the smooth muscle MLCK which is expressed in both smooth and non-muscle tissues, telokin is expressed in some smooth muscle tissues but has not been detected in aortic smooth muscle or in any non-muscle tissues.

Original languageEnglish (US)
Pages (from-to)23945-23952
Number of pages8
JournalJournal of Biological Chemistry
Volume266
Issue number35
StatePublished - Dec 15 1991
Externally publishedYes

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Smooth Muscle Myosins
Myosin-Light-Chain Kinase
Tissue
Smooth Muscle
Proteins
Introns
Muscle
Complementary DNA
Clone Cells
Calmodulin
Amino Acid Sequence
Exons
Phosphotransferases
Genes
telokin
Amino Acids
Muscles
Messenger RNA
DNA

ASJC Scopus subject areas

  • Biochemistry

Cite this

The carboxyl terminus of the smooth muscle myosin light chain kinase is expressed as an independent protein, telokin. / Gallagher, Patricia; Herring, B.

In: Journal of Biological Chemistry, Vol. 266, No. 35, 15.12.1991, p. 23945-23952.

Research output: Contribution to journalArticle

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