Cloning and sequencing of cDNA encoding a rat salivary cysteine proteinase inhibitor inducible by beta-adrenergic agonists.
The beta-adrenergic agonist isoproterenol induces a unique secretory protein (LM) in the salivary glands of developing and adult rats. In order to study the regulation of growth and gene expression by catecholamines, we have isolated and sequenced several cDNA clones encoding the LM protein. Each of the LM cDNA clones described identifies, by Northern blot analyses, a single mRNA species of approximately 900 bases in size. The mRNA encoding this secreted protein was not detected in submandibular glands or brains of untreated adult rats. Sequence analyses of the LM cDNA clones revealed a striking similarity to the family 2 of cysteine proteinase inhibitors. Furthermore, when purified LM protein was used to assay for inhibition of cysteine proteinases, the data demonstrated that it is indeed a type of cysteine proteinase inhibitor. This inhibitor, termed rat cystatin S, provides the first example of cysteine proteinase inhibitors that can be induced by beta-adrenergic agonists.
Shaw
P A
PA
Department of Anatomy, Mount Sinai School of Medicine, City University of New York, New York 10029.
Cox
J L
JL
Barka
T
T
Naito
Y
Y
D000375:Aging; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D003001:Cloning, Molecular; D003546:Cysteine Endopeptidases / Q000378:metabolism; D015853:Cysteine Proteinase Inhibitors; D004247:DNA / Q000235:genetics* / Q000302:isolation & purification; D005786:Gene Expression Regulation / Q000187:drug effects; D005796:Genes / Q000187:drug effects; D007545:Isoproterenol / Q000494:pharmacology*; D008969:Molecular Sequence Data; D011480:Protease Inhibitors / Q000096:biosynthesis / Q000235:genetics*; D051381:Rats; D011919:Rats, Inbred Strains; D012016:Reference Values; D013363:Submandibular Gland / Q000254:growth & development / Q000378:metabolism*
D015853:Cysteine Proteinase Inhibitors; D011480:Protease Inhibitors; D004247:DNA; D003546:Cysteine Endopeptidases; D007545:Isoproterenol