A temperature sensitive mutant, termed JE1306, derived from Escherichia coli strain PA3092 was found to have an alteration in the ribosomal protein L25. Crosses with various Hfr strains and transductions with P1 kc phage have revealed that the mutation maps at 47.3 min between nalA and fpk, in a reg
A new ribosomal proteinlocus in Escherichia coli: The gene for protein S6 maps at 97 min
โ Scribed by Isono, Katsumi ;Kitakawa, Madoka
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 568 KB
- Volume
- 153
- Category
- Article
- ISSN
- 0026-8925
No coin nor oath required. For personal study only.
โฆ Synopsis
A mutant of E. coli selected for temperature-sensitive growth on rich medium harbored an altered ribosomal protein S6 (Isono et al., 1976). This mutant was found to possess at least two mutations, one being responsible for the temperature-sensitivity and the other for the S6 alteration. Crosses with various Hfr strains as well as transductions with P 1kc revealed that the former mutation mapped at 98 min and the latter at 97 min. Furthermore, rec A derivatives of this mutant heteromerodiploid for this region possessed both the wild type and themutant forms of S6. Thus it was established that the gene at 97 min was indeed the structural gene for protein S6 (rpsF) and not a gene modifying it.
๐ SIMILAR VOLUMES
A mutant of Escherichia coli which was isolated for temperature-sensitive growth was found to harbour a structural alterations in protein S16 (Isolo et al., 1978). The mutation was localized by matings with various Hfr strains and by Plkc-mediated transduction. The results showed that it mapped very
Using mutants of Bacillus subtilis with alterations in the small subunit ribosomal proteins $6 and S16, the corresponding genes were mapped, rpsF was located between purA and cysA, close to the origin of replication. rpsP was located near pyrD, at about 135 degrees on the linkage map. The distributi
The conditionally lethal mutation, 2861 mis, has been mapped inside the ribosomal protein gene cluster at 72 minutes on the Escherichia coli chromosome and was found to cotransduce at 97% with rpsE (S5). The 2861 mis mutation leads to thermosensitivity and impaired assembly in vivo of 30S ribosomal
The fadD gene of Escherichia coli K12 was cloned and sequenced. The gene was identified by its ability to complement the corresponding mutant and by measuring the enzymatic activity after its expression in this mutant. The deduced polypeptide sequence exhibits similarity to other long chain acyl-CoA