A mutation in a new gene bglJ, activates the bgl operon in Escherichia coli K-12
Journal Article
·
· Genetics
OSTI ID:543006
- Simmons College, Boston, MA (United States)
A new mutation , bglJ4, has been characterized that results in the expression of the silent bgl operon. The bgl operon encodes proteins necessary for the transport and utilization of the aromatic {beta}-glucosides arbutin and salicin. A variety of mutations activate the operon and result in a Bgl{sup +} phenotype. Activating mutations are located upstream of the bgl promoter and in genes located elsewhere on the chromosome. Mutations outside of the bgl operon occur in the genes encoding DNA gyrase and in the gene encoding the nucleoid associated protein H-NS. The mutation described here, bglJ4, has been mapped to a new locus at min 99 on the Escherichia coli K-12 genetic map. The putative protein encoded by the bglJ gene has homology to a family of transcriptional activators. Evidence is presented that increased expression of the bglJ product is needed for activation of the bgl operon. 56 refs., 3 figs., 3 tabs.
- OSTI ID:
- 543006
- Journal Information:
- Genetics, Journal Name: Genetics Journal Issue: 2 Vol. 143; ISSN GENTAE; ISSN 0016-6731
- Country of Publication:
- United States
- Language:
- English
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