Mutation affecting thermostability of sigma subunit of Escherichia coli RNA polymerase lies near the dnaG locus at about 66 min on the E. coli genetic map.
AUTOR(ES)
Gross, C
RESUMO
The Escherichia coli strain, ts-rnp5, originally described in 1975 by G. D. Burdick and H. Berger, is shown to possess an RNA polymerase (RNA nucleotidyltransferase) sigma subunit with an activity 4--6 times less thermostable at 45 degrees than sigma from wild-type strains. This defect remains associated with the sigma polypeptide through a variety of purification stages, including renaturation of sigma after its elution from sodium dodecyl sulfate/polyacrylamide gels. The mutation responsible for decreased thermostability of sigma, called rpoD1, cotransduces with dnaG and therefore is located at about 66 min of the E. coli genetic map.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=411262Documentos Relacionados
- The gene for ribosomal protein S21, rpsU, maps close to dnaG at 66.5 min on the Escherichia coli chromosomal linkage map.
- Genetic map location of the Escherichia coli dnaG gene.
- Genetic suppression of a dnaG mutation in Escherichia coli.
- A gene from Escherichia coli affecting the sigma subunit of RNA polymerase.
- Novel dnaG mutation in a dnaP mutant of Escherichia coli.