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. 1968 Aug;96(2):492–500. doi: 10.1128/jb.96.2.492-500.1968

Relationship Between Protein and Ribonucleic Acid Synthesis During Outgrowth of Spores of Bacillus cereus

S Rodenberg 1,2,1, W Steinberg 1,2,2, J Piper 1,2,3, K Nickerson 1,2,4, J Vary 1,2,5, R Epstein 1,2, H O Halvorson 1,2,6
PMCID: PMC252323  PMID: 4970651

Abstract

The rate of protein and ribonucleic acid (RNA) synthesis was examined during the outgrowth of spores of Bacillus cereus T in a chemically defined medium. RNA synthesis started 2.5 min after the initiation of germination, and protein synthesis after 4 min. Addition of a complete amino acid supplement and uracil supported high rates of RNA and protein synthesis throughout outgrowth. To determine the relationship between the rate of protein (k) and RNA synthesis, the kinetics of formation of various classes of RNA were followed during outgrowth. Ribosomal RNA (rRNA) comprised a relatively constant fraction of the total RNA throughout outgrowth (71 to 78%). The classes of RNA synthesized during this period were determined by germinating spores in radioactive uracil and then at intervals following their stability to actinomycin D. Initially, labile RNA comprised the largest fraction of newly formed RNA (ΔRNA), and this proportion decreased during outgrowth. The ratio of k/rRNA or k/Δ stable RNA varied considerably during outgrowth, whereas the ratio of k/labile RNA remained constant. The data suggest that the rate of protein synthesis is not rigidly coupled to either total or newly synthesized rRNA (ribosomes) during the early stages of outgrowth.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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