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Comparative Study
. 1986 Aug;83(16):5849-53.
doi: 10.1073/pnas.83.16.5849.

Inhibin A-subunit cDNAs from porcine ovary and human placenta

K E Mayo, G M Cerelli, J Spiess, J Rivier, M G Rosenfeld, R M Evans, W Vale
Comparative Study

Inhibin A-subunit cDNAs from porcine ovary and human placenta

K E Mayo et al. Proc Natl Acad Sci U S A. 1986 Aug.

Abstract

Inhibin, a gonadal protein that preferentially suppresses the secretion of pituitary follicle-stimulating hormone, has been isolated from porcine follicular fluid and characterized as a 32-kDa protein composed of 18-kDa and 14-kDa subunits. In the present work, oligonucleotide probes predicted from amino-terminal inhibin amino acid sequences have been used to isolate, from a porcine ovarian lambda gt11 cDNA library, clones encoding the 18-kDa subunit, or A chain, of inhibin. DNA sequence analysis showed that the inhibin A chain is initially synthesized as a larger precursor protein and is predicted to be a glycopeptide. Inhibin A-chain mRNA is present specifically in the gonads, and its synthesis can be induced by treatment of the animal with gonadotropins. The porcine probe was used to isolate a human inhibin A-subunit cDNA from a placental cDNA library. The human precursor is highly homologous to its porcine counterpart and is predicted to generate an 18-kDa glycosylated inhibin A subunit.

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References

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