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KMID : 0545120070170101708
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Journal of Microbiology and Biotechnology
2007 Volume.17 No. 10 p.1708 ~ p.1711
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Heterogeneous rRNA Molecules Encoded by Streptomyces coelicolor M145 Genome are All Expressed and Assembled into Ribosomes
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Kim Hyun-Lee
Shin Eun-Kyoung
Kim Hong-Man
Go Ha-Young
Roh Jae-Sook
Bae Jee-Hyeon
Lee Kang-Seok
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Abstract
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The Streptomyces coelicolor M145 genome harbors six copies of divergent rRNA operons that differ at ~0.2% and ~0.6% of the nucleotide positions in small subunit (SSU) and large subunit (LSU) rRNA genes, respectively. When these rRNA genes are expressed, a single cell may harbor three different kinds of SSU rRNA and five kinds of LSU rRNA. Primer extension analyses revealed that all of the heterogeneous rRNA molecules are expressed and assembled into ribosomes. This finding and the maintenance of the intragenomic variability of rRNA operons imply the existence of functional divergence of rRNA species in this developmentally complex microorganism
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KEYWORD
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Streptomyces coelicolor, rRNA genes, SSU rRNA, LSU rRNA, heterogeneous rRNA
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