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- W1994540908 abstract "Endoplasmic reticulum (ER) resident proteins may be maintained in the ER by retention, where the leak into post-ER compartments is absent or slow, or retrieval, where a significant leak is countered by retrieval from post-ER compartments. Here the targeting of the C-terminally anchored protein ER-resident protein, cytochrome b5a (cytb5a), considered to be maintained in the ER mainly by the process of retention, is compared with that of sarcolipin (SLN) and phospholamban (PLB); also C-terminally anchored ER-residents. Laser confocal microscopy, and cell fractionation of green fluorescent protein-tagged constructs expressed in COS 7 cells indicate that while calnexin appears to be retained in the ER with no evidence of leak into the ER–Golgi intermediate compartment (ERGIC), significant amounts of cytb5a, SLN, and PLB are detectable in the ERGIC, indicating that there is considerable leak from the ER. This is supported by an in vitro budding assay that shows that while small amounts of calnexin appear in the transport vesicles budding off from the ER, significant amounts of cytb5a and SLN are found in such vesicles. These data support the hypothesis that retrieval plays a major role in ensuring that C-terminally anchored proteins are maintained in the ER. J. Cell. Biochem. 112: 3543–3548, 2011. © 2011 Wiley Periodicals, Inc." @default.
- W1994540908 created "2016-06-24" @default.
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- W1994540908 date "2011-10-22" @default.
- W1994540908 modified "2023-09-27" @default.
- W1994540908 title "Retrieval from the ER-golgi intermediate compartment is key to the targeting of c-terminally anchored ER-resident proteins" @default.
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- W1994540908 doi "https://doi.org/10.1002/jcb.23281" @default.
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