A temperature sensitive nonsense mutation affecting the synthesis of a major protein of Escherichia coli K12
โ Scribed by Cooper, Stephen ;Ruettinger, Therese
- Publisher
- Springer
- Year
- 1975
- Tongue
- English
- Weight
- 551 KB
- Volume
- 139
- Category
- Article
- ISSN
- 0026-8925
No coin nor oath required. For personal study only.
โฆ Synopsis
A temperature sensitive nonsense (TSN) mutant of E. coli K12 has been isolated in which a major bacterial protein is not synthesized at 42 degrees C. This protein is found in the parental strain at 42 degrees C and in cells rendered temperature resistant due to the insertion of a number of different nonsense suppressors or the normal allele of the mutant locus.
๐ SIMILAR VOLUMES
A putative temperature-sensitive transcription mutant described earlier (Jabbar and Jayaraman, 1976) has been genetically mapped. The locus maps at 38 min to the left of aroD. The mutation is recessive to the wild type and it affects a gene probably other than the genes coding for the alpha and beta
Temperature-sensitive (ts) mutations were isolated within a ribosomal protein gene (rpsL) of Escherichia coli K12. Mutations were mapped by complementation using various transducing phages and plasmids carrying the rpsL gene, having either a normal or a defective promoter for the rpsL operon. One of
The temperature sensitive allele recA200 has been cloned into the multiple copy number plasmid pBR322 and the gene product isolated. The purified RecA200 protein is temperature sensitive in ability to cleave the phage lambda and LexA repressors in vitro and also in ability to promote a successful se