Biochemical and genetic analysis of the biosynthesis, sorting, and secretion of Dictyostelium lysosomal enzymes.

Biochemical and genetic analysis of the biosynthesis, sorting, and secretion of Dictyostelium lysosomal enzymes.
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盘基网柄菌溶酶体酶的生物合成、分选和分泌的生化和遗传分析。

DOI:
10.1002/dvg.1020110522
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发表时间:
1990
期刊:
Developmental genetics
影响因子:
--
通讯作者:
Freeze,H
Freeze,H
中科院分区:
--
文献类型:
--
作者:
Cardelli,JA;Schatzle,J;Bush,JM;Richardson,J;Ebert,D;Freeze,H

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盘基网柄菌是研究溶酶体酶生物合成的有用系统,因为它可以相对容易地在遗传和生化上进行操作。以前的研究表明,溶酶体酶在营养生长的阿米巴中合成,作为糖基化的前体多肽,到达高尔基复合体后,在其N-连接的寡糖侧链上被磷酸化和硫化。前体多肽是膜相关的,直到它们被蛋白水解性加工并沉积为溶酶体中的可溶性成熟酶。本文综述了用于确定翻译后修饰、酸性pH区和蛋白分解过程在溶酶体酶的运输和分选中的作用的生物化学实验。我们还描述了正在使用的分子遗传学方法来研究这些酶的生物合成。改变溶酶体酶的分选和分泌的突变体正在进行生化分析,我们描述了最近克隆三种溶酶体酶编码基因的努力,以更好地了解这些酶的靶向分子机制。
Dictyostelium discoideumis a useful system to study the biosynthesis of lysosomal enzymes because of the relative ease with which it can be manipulated genetically and biochemically. Previous studies have revealed that lysosomal enzymes are synthesized in vegetatively growing amoebae as glycosylated precursor polypeptides that are phosphorylated and sulfated on their N‐linked oligosaccharide side‐chains upon arrival in the Golgi complex. The precursor polypeptiaes are membrane associated until they are proteolytically processed and deposited as soluble mature enzymes in lysosomes. In this paper we review biochemical experiments designed to determine the roles of post‐translational modification, acidic pH compartments, and proteolytic processing in the transport and sorting of lysosomal enzymes. We also describe molecular genetic approaches that are being employed to study the biosynthesis of these enzymes. Mutants altered in the sorting and secretion of lysosomal enzymes are being analyzed biochemically, and we describe recent efforts to clone the genes coding for three lysosomal enzymes in order to better understand the molecular mechanisms involved in the targeting of these enzymes.
DOI: --
发表时间: 1984
影响因子: 4.8
作者:
D. Knecht;R. Dimond;S. Wheeler;W. Loomis
通讯作者: W. Loomis
盘基网柄菌的 mod A 突变体缺少参与天冬酰胺连接寡糖加工的 α 1,3-葡萄糖苷酶。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Freeze,HH;Yeh,R;Miller,AL;Kornfeld,S
通讯作者: Kornfeld,S
DOI: --
发表时间: 1986
影响因子: 4.8
作者:
N. Woychik;J. Cardelli;R. Dimond
通讯作者: R. Dimond
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Cardelli,JA;Richardson,J;Miears,D
通讯作者: Miears,D
DOI: 10.1016/0012-1606(81)90409-7
发表时间: 1981
影响因子: 2.7
作者:
Burns,RA;Livi,GP;Dimond,RL
通讯作者: Dimond,RL