Polyribosomes were isolated from Baccillus licheniformis, grown at 37 and 46 degrees C, and from Bacillus stearothermophilus, grown at 46 and 55 degrees C. The polyribosomes were incubated with either [3H]puromycin or [14C]phenylalanine. The number of active ribosomes (i.e. those to which growing polypeptide chains are attached) was calculated from the amount of [3H]peptidyl-puromycin formed. The activity of an active ribosome (i.e. the total number of amino acid molecules incorporated/unit time per active ribosome) was calculated from the uptake of [14C]phenylalanine. The number of active ribosomes per migrogram of RNA was as follows: for B. licheniformis, 1.66 × 10(12) and 1.72 × 10(12) at 37 and 46 degrees C respectively; for B. stearothermophilus, 2.59 × 10(12) at 46 and 55 degreesC respectively. The activity per active ribosome was as follows: for B. licheniformis, 0.61 and 0.05 at 37 and 46 degrees C respectively; for B. stearothermophilus, 0.58 and 0.42 at 46 and 55 degrees C respectively.
Research Article|June 15 1977
Number and activity of active ribosomes in bacterial polyribosomes
Biochem J (1977) 164 (3): 669-674.
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J Stenesh, P Y Shen; Number and activity of active ribosomes in bacterial polyribosomes. Biochem J 15 June 1977; 164 (3): 669–674. doi: https://doi.org/10.1042/bj1640669
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