Disruption of disulfide bonds exhibits differential effects on trafficking of regulated secretory proteins.
Disruption of disulfide bonds exhibits differential effects on trafficking of regulated secretory proteins.
复制标题
二硫键的破坏对受调节的分泌蛋白的运输表现出不同的影响。
DOI:
10.1152/ajpcell.1999.277.1.c121
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Arvan,P
中科院分区:
文献类型:
--
作者:
Gorr,SU;Huang,XF;Cowley,DJ;Kuliawat,R;Arvan,P
For several secretory proteins, it has been hypothesized that disulfide-bonded loop structures are required for sorting to secretory granules. To explore this hypothesis, we employed dithiothreitol (DTT) treatment in live pancreatic islets, as well as in PC-12 and GH4C1cells. In islets, disulfide reduction in the distal secretory pathway did not increase constitutive or constitutive-like secretion of proinsulin (or insulin). In PC-12 cells, DTT treatment caused a dramatic increase in unstimulated secretion of newly synthesized chromogranin B (CgB), presumably as a consequence of reducing the single conserved chromogranin disulfide bond (E. Chanat, U. Weiss, W. B. Huttner, and S. A. Tooze.EMBO J.12: 2159–2168, 1993). However, in GH4C1cells that also synthesize CgB endogenously, DTT treatment reduced newly synthesized prolactin and blocked its export, whereas newly synthesized CgB was routed normally to secretory granules. Moreover, on transient expression in GH4C1cells, CgA and a CgA mutant lacking the conserved disulfide bond showed comparable multimeric aggregation properties and targeting to secretory granules, as measured by stimulated secretion assays. Thus the conformational perturbation of regulated secretory proteins caused by disulfide disruption leads to consequences in protein trafficking that are both protein and cell type dependent.
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DOI:
--
发表时间:
1993
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
S. Freedman;G. Scheele
通讯作者:
G. Scheele
影响因子:
11.4
作者:
S. Natori;Angus King;A. Hellwig;U. Weiss;H. Iguchi;B. Tsuchiya;T. Kameya;R. Takayanagi;H. Nawata;W. Huttner
通讯作者:
W. Huttner
影响因子:
4.1
作者:
S. Urbé;A. Dittié;S. Tooze
通讯作者:
S. Tooze
影响因子:
4.7
作者:
A. M. Van Horssen;F. V. van Kuppeveld;G. Martens
通讯作者:
G. Martens
DOI:
10.1073/pnas.84.14.5043
发表时间:
1987
影响因子:
11.1
作者:
Ahn,TG;Cohn,DV;Gorr,SU;Ornstein,DL;Kashdan,MA;Levine,MA
通讯作者:
Levine,MA