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. 1983 Jan;153(1):357–363. doi: 10.1128/jb.153.1.357-363.1983

Effects of the hisT mutation of Salmonella typhimurium on translation elongation rate.

D T Palmer, P H Blum, S W Artz
PMCID: PMC217379  PMID: 6401282

Abstract

The hisT mutation in Salmonella typhimurium which results in loss of pseudouridine base modifications in the anticodon regions of many tRNAs was shown to reduce the rate of protein synthesis in vivo by about 20 to 25% as compared with that measured in hisT strains. Reduced protein synthesis rate occurred predominantly at the level of translation rather than transcription. Increased sensitivity of hisT mutants to growth inhibition by antibiotics that inhibit translation elongation, but not by those that inhibit translation initiation, transcription initiation, or transcription elongation, indicates that the hisT mutation leads to a defect in one or more of the steps in the polypeptide chain elongation mechanism. These results can account for effects of the hisT mutation on regulation of certain amino acid biosynthetic operons, including the his, leu, and ilv operons.

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Selected References

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