A diacidic motif determines unconventional secretion of wild-type and ALS-linked mutant SOD1.
A diacidic motif determines unconventional secretion of wild-type and ALS-linked mutant SOD1.
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DOI:
10.1083/jcb.201704056
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发表时间:
2017-09-04
期刊:
影响因子:
--
通讯作者:
Malhotra V
中科院分区:
文献类型:
--
作者:
Cruz-Garcia D;Brouwers N;Duran JM;Mora G;Curwin AJ;Malhotra V
Starvation-induced unconventional secretion of Acb1 requires ESCRT-I, -II, and -III and Grh1. Cruz-Garcia et al. report that SOD1 and its mutant form linked to amyotrophic lateral sclerosis are also secreted upon nutrient starvation in a Grh1- and ESCRT-I–, -II–, and -III–dependent process. The authors identify a conserved diacidic motif in Acb1 and SOD1 that is necessary for their export in yeast and human cells. The nutrient starvation-specific unconventional secretion of Acb1 in Saccharomyces cerevisiae requires ESCRT-I, -II, and -III and Grh1. In this study, we report that another signal sequence lacking cytoplasmic protein, superoxide dismutase 1 (SOD1), and its mutant form linked to amyotrophic lateral sclerosis (ALS), is also secreted by yeast upon nutrient starvation in a Grh1- and ESCRT-I–, -II–, and -III–dependent process. Our analyses reveal that a conserved diacidic motif (Asp-Glu) in these proteins is necessary for their export. Importantly, secretion of wild-type human SOD1 and the ALS-linked mutant in human cells also require the diacidic residues. Altogether, these findings reveal information encoded within the cytoplasmic proteins required for their unconventional secretion and provide a means to unravel the significance of the cytoplasmic versus the secreted form of mutant SOD1 in the pathology of ALS. We also propose how cells, based on a signal-induced change in cytoplasmic physiology, select a small pool of a subset of cytoplasmic proteins for unconventional secretion.
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DOI:
10.1083/jcb.201106098
发表时间:
2011-12-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bruns C;McCaffery JM;Curwin AJ;Duran JM;Malhotra V
通讯作者:
Malhotra V
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
7.7
作者:
Curwin, Amy J.;Brouwers, Nathalie;Malhotra, Vivek
通讯作者:
Malhotra, Vivek
DOI:
10.1016/1357-2725(96)00004-0
发表时间:
1996-06-01
影响因子:
4
作者:
Mondola, P;Annella, T;Santangelo, F
通讯作者:
Santangelo, F
影响因子:
3.5
作者:
Ratovitski, T;Corson, LB;Borchelt, DR
通讯作者:
Borchelt, DR