Abstract
When a signal sequence is attached to beta-galactosidase, the normally cytoplasmic protein is unable to fully traverse the cytoplasmic membrane. We used a genetic approach to study those features of beta-galactosidase responsible for the block in translocation. By using both in vivo and in vitro techniques, fragments of beta-galactosidase were interposed between a signal sequence and alkaline phosphatase. The alkaline phosphatase acts as a sensor for any blocking effects of beta-galactosidase on export. From these studies, we show that multiple regions of beta-galactosidase contribute to its failure to be translocated. These results are most easily interpreted if the folding of beta-galactosidase or of domains of it is responsible for the block in export. In addition, in certain constructs, positively charged amino acids directly following the signal sequence interfered with export.
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Dates
Type | When |
---|---|
Created | 8 years, 9 months ago (Nov. 4, 2016, 1:48 p.m.) |
Deposited | 4 years ago (July 29, 2021, 1:45 p.m.) |
Indexed | 1 year, 9 months ago (Nov. 6, 2023, 10:09 a.m.) |
Issued | 35 years, 11 months ago (Sept. 1, 1989) |
Published | 35 years, 11 months ago (Sept. 1, 1989) |
Published Print | 35 years, 11 months ago (Sept. 1, 1989) |
@article{Lee_1989, title={Genetic studies on the inability of beta-galactosidase to be translocated across the Escherichia coli cytoplasmic membrane}, volume={171}, ISSN={1098-5530}, url={http://dx.doi.org/10.1128/jb.171.9.4609-4616.1989}, DOI={10.1128/jb.171.9.4609-4616.1989}, number={9}, journal={Journal of Bacteriology}, publisher={American Society for Microbiology}, author={Lee, C and Li, P and Inouye, H and Brickman, E R and Beckwith, J}, year={1989}, month=sep, pages={4609–4616} }