Diphtheria Toxin Translocation across Endosome Membranes
Diphtheria Toxin Translocation across Endosome Membranes
复制标题
白喉毒素跨内体膜易位
DOI:
10.1074/jbc.273.14.8351
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
E. Mekada
中科院分区:
文献类型:
--
作者:
T. Umata;E. Mekada
By using cells overexpressing diphtheria toxin (DT) receptor and a novel method of permeabilizing the plasma membrane with a bacterial pore-forming toxin, specific translocation of fragment A to the cytosol was observed, whereas full-size DT and other minor species of DT-derived fragments were left in intracellular vesicles. The translocation competence of DT proteins with mutations in the transmembrane domain is consistent with their cytotoxicities. The charge-reversal mutants E349K and D352K do not translocate their fragment A to the cytosol, whereas D352N is partially competent. ADP-ribosyltransferase activity of fragment A is not required for translocation. Novel fragments of DT with apparent molecular masses of 28 and 35 kDa were detected in endocytic vesicles. The 28-kDa fragment consists of fragment A and an N-terminal piece of fragment B, whereas the 35-kDa fragment contains part of fragment B and may be complementary to the 28-kDa fragment. Time course studies show that the 28-kDa fragment appears in endocytic vesicles prior to translocation of fragment A to the cytosol, raising the possibility that the 28-kDa fragment is an intermediate in translocation. We present a model for translocation of fragment A that incorporates the observations made using the novel permeabilization method.
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DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
DiPaola,M;Maxfield,FR
通讯作者:
Maxfield,FR
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Jiang,GS;Solow,R;Hu,VW
通讯作者:
Hu,VW
影响因子:
3.7
作者:
Wedel,N;Toselli,P;Pothoulakis,C;Faris,B;Oliver,P;Franzblau,C;LaMont,T
通讯作者:
LaMont,T
DOI:
10.1073/pnas.89.13.6202
发表时间:
1992-07-01
影响因子:
11.1
作者:
OKEEFE, DO;CABIAUX, V;COLLIER, RJ
通讯作者:
COLLIER, RJ
DOI:
10.1016/0006-291x(85)90498-x
发表时间:
1985
影响因子:
3.1
作者:
Obrig,TG;Moran,TP;Colinas,RJ
通讯作者:
Colinas,RJ