Proteolytic Processing of Familial British Dementia-associated BRI Variants
Proteolytic Processing of Familial British Dementia-associated BRI Variants
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家族性英国痴呆相关 BRI 变异体的蛋白水解加工
DOI:
--
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发表时间:
2002
影响因子:
4.8
通讯作者:
S. Sisodia
中科院分区:
文献类型:
--
作者:
Seong‐Hun Kim;J. Creemers;S. Chu;G. Thinakaran;S. Sisodia
Different mutations in theBRI2 gene cause rare neurodegenerative conditions, termed familial British dementia (FBD) and familial Danish dementia (FDD). The mutant genes encode BRI-L and BRI-D, the precursors of fibrillogenic ABri and ADan peptides, respectively. We previously reported that furin processes both BRI-L and its wild type counterpart, BRI, resulting in the secretion of C-terminal peptides; elevated levels of peptides were generated from BRI-L. In the present study, we show that inducible expression of α1-antitrypsin Portland, a furin inhibitor, inhibits the endoproteolysis of BRI and BRI-L in a dose-dependent manner. Moreover, comparison of the activities of several proprotein convertases reveals that furin is most efficient in endoproteolysis of BRI and BRI-L; PACE4, PC6A, PC6B, and LPC show much lower activities. Interestingly, LPC also exhibits enhanced cleavage of BRI-L compared with BRI. Finally, we demonstrate that BRI-D is also processed by furin and, like BRI-L, the cleavage of BRI-D is more efficient than that of BRI. Interestingly, while the ABri peptide is detected both intracellularly and in the medium, the ADan peptide accumulates predominantly in intracellular compartments. We propose that intracellular accumulation of amyloidogenic ADan or ABri peptides results in the neuronal damage leading to FDD and FBD, respectively.
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影响因子:
3.5
作者:
Vidal,R;Calero,M;Révész,T;Plant,G;Ghiso,J;Frangione,B
通讯作者:
Frangione,B
DOI:
10.1073/pnas.080076097
发表时间:
2000-04-25
影响因子:
11.1
作者:
Vidal, R;Révész, T;Frangione, B
通讯作者:
Frangione, B
影响因子:
19
作者:
Molloy, SS;Anderson, ED;Thomas, G
通讯作者:
Thomas, G
DOI:
10.1073/pnas.95.13.7293
发表时间:
1998-06-23
影响因子:
11.1
作者:
Jean, F;Stella, K;Thomas, G
通讯作者:
Thomas, G
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Moehring,JM;Inocencio,NM;Robertson,BJ;Moehring,TJ
通讯作者:
Moehring,TJ