Cell-free and cellular synthesis of chromogranin A and B of bovine adrenal medulla

Cell-free and cellular synthesis of chromogranin A and B of bovine adrenal medulla
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牛肾上腺髓质嗜铬粒蛋白 A 和 B 的无细胞和细胞合成

DOI:
10.1016/0306-4522(85)90323-9
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发表时间:
1985
期刊:
影响因子:
3.3
通讯作者:
H. Winkler
H. Winkler
中科院分区:
医学3区
文献类型:
--
作者:
G. Falkensammer;R. Fischer‐Colbrie;K. Richter;H. Winkler

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我们研究了嗜铬粒蛋白A和嗜铬粒蛋白B的细胞合成和细胞合成,这是两个免疫上不同的肾上腺嗜铬粒蛋白家族。两种无细胞系统(小麦胚芽和网织红细胞裂解液)用于翻译从牛肾上腺髓质分离的信使RNA。在微粒体存在的情况下,两个主要的翻译产物(前染色体粒蛋白A)被转化为一个单一的蛋白质,显然是通过去除不同的信号肽。嗜铬粒蛋白B只翻译了一个前体(嗜铬粒蛋白B前体)。在分离的嗜铬细胞中,只合成一种与加工后的无细胞翻译产物相对应的嗜铬粒蛋白A。在长时间的孵育过程中,这种蛋白质变得稍大,酸性更强,可能是由于高尔基区糖基化。嗜铬粒蛋白B在翻译后转化为酸性更强的蛋白质。由此可见,新合成的嗜铬粒蛋白A和嗜铬粒蛋白B在嗜铬粒中的蛋白水解分解过程与脑啡肽前体相当,是一个缓慢的过程。目前尚不清楚这些染色质颗粒具有什么功能,以及分解成更小的亚基是否对任何功能的进化是必要的。
We have studied the cell-free and cellular synthesis of chromogranins A and B, two immunologically distinct protein families of adrenal chromaffin granules. Two cell-free systems (wheat germ and reticulocyte lysate) were used for translating messenger RNA isolated from bovine adrenal medulla. Two primary translation products could be immunoprecipitated in case of chromogranin A. In the presence of microsomes the two chromogranin A precursors (pre-chromogranins A) were converted into a single protein, apparently by the removal of different signal peptides. For chromogranin B only one precursor (pre-chromogranin B) was translated. In isolated chromaffin cells only one chromogranin A protein was synthesized which corresponded to the processed cell-free translation product. During prolonged incubation this protein became slightly larger and more acidic, probably due to glycosylation in the Golgi region. Chromogranin B is post-translationally converted to a significantly more acidic protein.It is concluded that proteolytic breakdown of newly synthesized chromogranin A and B in chromaffin granules is a slow process comparable to that of the enkephalin precursors. It is not yet known what function these chromogranins have and whether breakdown to smaller subunits is necessary for any function to evolve.
嗜铬颗粒基质的糖蛋白和蛋白聚糖。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Kiang,WL;Krusius,T;Finne,J;Margolis,RU;Margolis,RK
通讯作者: Margolis,RK
DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
O'Connor,DT;Frigon,RP
通讯作者: Frigon,RP
甲状旁腺分泌蛋白的细胞和无细胞加工。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Majzoub,JA;Dee,PC;Habener,JF
通讯作者: Habener,JF