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| Content Provider | PubMed Central |
|---|---|
| Author | Bonifacino, J. S. Cosson, P. Shah, N. Klausner, R. D. |
| Abstract | The selective breakdown of newly synthesized proteins retained within the endoplasmic reticulum (ER) is probably mediated by the specific recognition of structural features of protein substrates by components of a degradative system. Within the alpha chain of the multisubunit T-cell antigen receptor (TCR) complex, a transmembrane sequence containing two basic amino acid residues has been shown to act as a determinant for retention and rapid degradation in the ER. We now demonstrate that single basic or acidic amino acid residues can cause targeting for retention and degradation in the ER when placed within the transmembrane domain of an integral membrane protein normally destined for the cell surface. The effect of such potentially charged residues is dependent on their relative position within the transmembrane sequence and on the nature of the amino acid side chains. The phenotypic changes induced by potentially charged transmembrane residues occur without apparent alterations of the global folding or transmembrane topology of the mutant proteins. These observations test the hypothesis that potentially charged residues within transmembrane domains can provide the basis for a motif for ER degradation and explain the selective breakdown of some proteins retained within the ER. |
| Starting Page | 2783 |
| File Format | |
| ISSN | 14602075 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 10 |
| Volume Number | 10 |
| Language | English |
| Publisher Date | 1991-10-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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