The number, physical organization and transcription of ribosomal RNA cistrons in an archaebacterium: Halobacterium halobium (original) (raw)

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Department of Biochemistry, Dalhousie University

Halifax, Nova Scotia, Canada B3H 4H7

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Department of Biochemistry, Dalhousie University

Halifax, Nova Scotia, Canada B3H 4H7

Search for other works by this author on:

Department of Biochemistry, Dalhousie University

Halifax, Nova Scotia, Canada B3H 4H7

Search for other works by this author on:

Published:

10 November 1979

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Jason D. Hofman, Reginald H. Lau, W.Ford Doolittle, The number, physical organization and transcription of ribosomal RNA cistrons in an archaebacterium: Halobacterium halobium, Nucleic Acids Research, Volume 7, Issue 5, 10 November 1979, Pages 1321–1334, https://doi.org/10.1093/nar/7.5.1321
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Abstract

Because it is now clear that archaebacteria may be as distinct from eubacteria as either group is from eukaryotic cells, and because a specifically archaebacterial ancestry has been proposed for the nuclear-cytoplasmic component of eukaryotic cells, we undertook to characterize, for the first time, the ribosomal RNA cistrons of an archaebacterium ( Halobacterium halobium ). We found these cistrons to be physically linked in the order 16S-23S-5S, and obtained evidence that they are also transcribed from a common promoter(s) in the order 5′-16S-23S-5S-3′. We showed that, although slightly larger immediate precursors of 16S and 23S are readily seen, no common precursor of both 16S and 23S can be easily detected in vivo . In all these respects the archaebacterium H. halobium is like a eubacterium and unlike the nuclear-cytoplasmic component of eukaryotic cells. We found, however, that it differs from eubacteria of comparable (large) genome size 1n having only one copy of the rRNA gene cluster per genome.

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