Protein disulfide isomerase-like proteins play opposing roles during retrotranslocation.

Protein disulfide isomerase-like proteins play opposing roles during retrotranslocation.
复制标题

DOI:
10.1083/jcb.200602046
复制
发表时间:
2006-06-19
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Tsai B
Tsai B
中科院分区:
其他
文献类型:
--
作者:
Forster ML;Sivick K;Park YN;Arvan P;Lencer WI;Tsai B

文献摘要

参考文献

被引文献

相似文献

内质网(ER)中的错误折叠蛋白质被保留在细胞器中或逆向转运到胞质溶胶中进行蛋白酶体降解。引导这些相反过程的ER分子伴侣在很大程度上是未知的。我们开发了一种半透性细胞系统,以研究霍乱毒素(CT)的逆向转运,霍乱毒素是一种在中毒过程中穿过内质网膜到达细胞质的毒性物质。我们发现,蛋白质二硫键异构酶(PDI)促进CT逆转位,而ERp72,PDI样蛋白,介导其ER保留。体外分析表明,PDI和ERp72改变CT的构象的方式与他们的角色在retrotranslocation和ER保留。此外,我们发现PDI和ERp72的相反功能对内源性ER错误折叠蛋白起作用。因此,我们的数据确定PDI家族蛋白质,发挥相反的作用,在ER质量控制,并建立一个测定,以进一步描绘的机制CT逆转录。
Misfolded proteins in the endoplasmic reticulum (ER) are retained in the organelle or retrotranslocated to the cytosol for proteasomal degradation. ER chaperones that guide these opposing processes are largely unknown. We developed a semipermeabilized cell system to study the retrotranslocation of cholera toxin (CT), a toxic agent that crosses the ER membrane to reach the cytosol during intoxication. We found that protein disulfide isomerase (PDI) facilitates CT retrotranslocation, whereas ERp72, a PDI-like protein, mediates its ER retention. In vitro analysis revealed that PDI and ERp72 alter CT's conformation in a manner consistent with their roles in retrotranslocation and ER retention. Moreover, we found that PDI's and ERp72's opposing functions operate on endogenous ER misfolded proteins. Thus, our data identify PDI family proteins that play opposing roles in ER quality control and establish an assay to further delineate the mechanism of CT retrotranslocation.
DOI: 10.1002/humu.20263
发表时间: 2005-12-01
期刊: HUMAN MUTATION
影响因子: 3.9
作者:
Cotterill, SL;Jackson, GC;Briggs, MD
通讯作者: Briggs, MD
DOI: 10.1016/s0092-8674(01)00289-6
发表时间: 2001-03-23
期刊: CELL
影响因子: 64.5
作者:
Tsai, B;Rodighiero, C;Rapoport, TA
通讯作者: Rapoport, TA
DOI: 10.1074/jbc.m507071200
发表时间: 2006-01-06
影响因子: 4.8
作者:
Sorensen, S;Ranheim, T;Kulseth, MA
通讯作者: Kulseth, MA
DOI: 10.1074/jbc.272.24.15562
发表时间: 1997-06-13
影响因子: 4.8
作者:
Lencer, WI;Constable, C;Hirst, TR
通讯作者: Hirst, TR
DOI: 10.1074/jbc.m001073200
发表时间: 2000-12-29
影响因子: 4.8
作者:
Tokunaga, F;Brostrom, C;Arvan, P
通讯作者: Arvan, P