SecA protein autogenously represses its own translation during normal protein secretion in Escherichia coli
Year: 1989
Type: article
Abstract: The Escherichia coli secA gene, whose expression is responsive to the protein secretion status of the cell, is the second gene in an operon. We found that both the basal and induced levels of SecA biosynthesis are dependent on prior translation of the upstream gene, gene X, and identified two large gene X-secA transcripts. The 10-fold derepression of secA expression by protein export defects was at the translational level since no further increases in gene X or secA mRNA levels were detected during this period, and a secA-lacZ protein fusion but not an operon fusion was appropriately derepressed. Furthermore, overexpression of the SecA protein severely reduced expression of only the secA-lacZ protein fusion, indicating that SecA autogenously represses its own translation.
Source: Journal of Bacteriology
Authors: M G Schmidt, D B Oliver
Institution: Stony Brook University
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
Funder: National Cancer Institute
OpenAlex ID: W1740944002