Number of ribosomes

Value 1500 ribosomes/cell
Organism Bacteria Rickettsia prowazekii
Reference Fegatella F., Lim J., Kjelleberg S., Cavicchioli R. Implications of rRNA operon copy number and ribosome content in the marine oligotrophic ultramicrobacterium Sphingomonas sp. strain RB2256. Appl Environ Microbiol. 1998. 64(11):4433-4438 p.4437 right column bottom paragraphPubMed ID9797303
Primary Source [29] Pang, H. and Winkler, H.H. The concentrations of stable RNA and ribosomes in Rickettsia prowazekii. 1994. Mol. Microbiol. 12(1) pp.115-120PubMed ID7520114
Comments P.4437 right column bottom paragraph: "An apparent excess of ribosomes in ultramicrobacteria (cell volume = 0.09 μm^3) has also been observed in the parasite Rickettsia prowazekii (primary source). The rickettsiae have a generation time of about 10 h (μ = 0.07 cell h^−1) when growing in the cytoplasms of their eucaryotic hosts. Their low rate of growth correlates well with a low number of ribosomes (1,500 per cell), however, the cellular concentration is 17,000 per μm^3 (Table3) (ref 30, Schut F. (1993) Ph.D. thesis. (University of Groningen, Groningen, The Netherlands))."
Entered by Phil Mongiovi
ID 102216