Forage R G, Ring J M, Brown R W, McInerney B V, Cobon G S, Gregson R P, Robertson D M, Morgan F J, Hearn M T, Findlay J K
Proc Natl Acad Sci U S A. 1986 May;83(10):3091-5. doi: 10.1073/pnas.83.10.3091.
The primary amino acid structures of the 43-kDa (A) and 15-kDa (B) subunits of the 58-kDa form of the hormone inhibin have been elucidated by cloning and analysis of cDNA species derived from bovine granulosa cell mRNA. The A subunit (Mr = 32,298) is a protein of 300 amino acids with two potential N-glycosylation sites and two potential proteolytic processing sites and has a pre-pro region of 60 amino acids. The mature B subunit (Mr = 12,977) is a protein of 116 amino acids synthesized from a separate mRNA. These data establish that a 31-kDa form of inhibin also isolated from bovine follicular fluid, with subunits of 20 kDa (Ac) and 15 kDa (B), is derived from the 58-kDa form by proteolytic processing of the A subunit.
通过对源自牛颗粒细胞mRNA的cDNA进行克隆和分析,已阐明了58 kDa形式的激素抑制素的43 kDa(A)和15 kDa(B)亚基的一级氨基酸结构。A亚基(Mr = 32,298)是一种由300个氨基酸组成的蛋白质,具有两个潜在的N-糖基化位点和两个潜在的蛋白水解加工位点,并且有一个由60个氨基酸组成的前原区域。成熟的B亚基(Mr = 12,977)是一种由单独的mRNA合成的116个氨基酸的蛋白质。这些数据表明,同样从牛卵泡液中分离出的、具有20 kDa(Ac)和15 kDa(B)亚基的31 kDa形式的抑制素,是通过A亚基的蛋白水解加工从58 kDa形式衍生而来的。