Abstract
The ability of the signal recognition particle (SRP) to induce translational arrests in wheat germ, reticulocyte and HeLa cell-free translation systems was examined. In accordance with published data, SRP caused a complete arrest of secretory protein (IgG light chain) translation in wheat germ. In contrast, SRP had no effect on translation in either reticulocyte or HeLa cell lysates, even at 5-fold higher SRP levels than needed for complete arrest in wheat germ. The existence of a "docking-protein-like" releasing activity was ruled out, in the case of reticulocyte lysate, by experiments in which reticulocyte subfractions were added to blocked translations in wheat germ. In the absence of additional evidence to the contrary, it seems as if the translational arrest is peculiar to the wheat germ cell-free system.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Blobel G., Dobberstein B. Transfer of proteins across membranes. II. Reconstitution of functional rough microsomes from heterologous components. J Cell Biol. 1975 Dec;67(3):852–862. doi: 10.1083/jcb.67.3.852. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dobberstein B., Garoff H., Warren G., Robinson P. J. Cell-free synthesis and membrane insertion of mouse H-2Dd histocompatibility antigen and beta 2-microglobulin. Cell. 1979 Aug;17(4):759–769. doi: 10.1016/0092-8674(79)90316-7. [DOI] [PubMed] [Google Scholar]
- Garoff H., Simons K., Dobberstein B. Assembly of the Semliki Forest virus membrane glycoproteins in the membrane of the endoplasmic reticulum in vitro. J Mol Biol. 1978 Oct 5;124(4):587–600. doi: 10.1016/0022-2836(78)90173-0. [DOI] [PubMed] [Google Scholar]
- Gilmore R., Blobel G., Walter P. Protein translocation across the endoplasmic reticulum. I. Detection in the microsomal membrane of a receptor for the signal recognition particle. J Cell Biol. 1982 Nov;95(2 Pt 1):463–469. doi: 10.1083/jcb.95.2.463. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hortsch M., Meyer D. I. Pushing the signal hypothesis: what are the limits? Biol Cell. 1984;52(1 Pt A):1–8. doi: 10.1111/j.1768-322x.1985.tb00319.x. [DOI] [PubMed] [Google Scholar]
- Meyer D. I., Dobberstein B. A membrane component essential for vectorial translocation of nascent proteins across the endoplasmic reticulum: requirements for its extraction and reassociation with the membrane. J Cell Biol. 1980 Nov;87(2 Pt 1):498–502. doi: 10.1083/jcb.87.2.498. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Meyer D. I., Krause E., Dobberstein B. Secretory protein translocation across membranes-the role of the "docking protein'. Nature. 1982 Jun 24;297(5868):647–650. doi: 10.1038/297647a0. [DOI] [PubMed] [Google Scholar]
- Richter J. D., Lorenz L. J., Audet R. G. Membrane-bound mRNAs are recruited from preinitiated ribonucleoprotein particles in injected Xenopus oocytes. J Biol Chem. 1985 Apr 10;260(7):4448–4454. [PubMed] [Google Scholar]
- Walter P., Blobel G. Purification of a membrane-associated protein complex required for protein translocation across the endoplasmic reticulum. Proc Natl Acad Sci U S A. 1980 Dec;77(12):7112–7116. doi: 10.1073/pnas.77.12.7112. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Walter P., Gilmore R., Blobel G. Protein translocation across the endoplasmic reticulum. Cell. 1984 Aug;38(1):5–8. doi: 10.1016/0092-8674(84)90520-8. [DOI] [PubMed] [Google Scholar]
- Walter P., Ibrahimi I., Blobel G. Translocation of proteins across the endoplasmic reticulum. I. Signal recognition protein (SRP) binds to in-vitro-assembled polysomes synthesizing secretory protein. J Cell Biol. 1981 Nov;91(2 Pt 1):545–550. doi: 10.1083/jcb.91.2.545. [DOI] [PMC free article] [PubMed] [Google Scholar]