Abstract
The Streptomyces coelicolor genome harbors six copies of divergent large subunit (LSU) rRNA genes that constitute five kinds of LSU rRNA species in a cell. We report here that each heterogeneous LSU rRNA species is differentially expressed during morphological development. However, differential expression of rRNA species was not affected by depletion of a specific nutrient such as carbon, nitrogen, or phosphate from the culture medium. Analysis of the upstream region of the rRNA operons revealed that each operon contains a different composition of conserved rRNA gene promoters, indicating that each operon is independently regulated at the transcriptional level. These findings imply the existence of a regulatory mechanism that controls the independent expression of each LSU rRNA and a possible role of different species of LSU rRNA in posttranscriptional regulation of gene expression during the life cycle of this developmentally complex microorganism.
Similar content being viewed by others
References
Baylis HA, Bibb MJ (1988) Organisation of the ribosomal RNA genes in Streptomyces coelicolor A3(2). Mol Gen Genet 211:191–196
Bentley SD, Chater KF, Cerdeno-Tarraga AM et al (2002) Complete genome sequence of the model actinomycete Streptomyces coelicolor A3(2). Nature 417:141–147
Dennis PP, Zische S, Mylvaganam S (1998) Transcriptional analysis of two disparate rRNA operons in halophilic archeaon Haloarcula marismortui. J Bacteriol 180:4804–4813
Gunderson JH, Sogin ML, Wollett G et al (1987) Structurally distinct, stage specific ribosomes occur in Plasmodium. Science 238:933–937
Hahn M-Y, Roe J-H (2007) Partial purification of factors for differential transcription of rrnD promoters for ribosomal RNA synthesis in Streptomyces coelicolor. J Microbiol 45:534–540
Kim H-L, Shin E, Kim H-M et al (2007) Heterogeneous rRNA molecules encoded by Streptomyces coelicolor M145 genome are all expressed and assembled into ribosomes. J Microbiol Biotechnol 17:1708–1711
Kim H-L, Shin E, Kim H-M et al (2007) Heterogeneous rRNAs are differentially expressed during the morphological development of Streptomyces coelicolor. FEMS Microbiol Lett 275:146–152
Kiser T, Bibb MJ, Chater KF et al (2000) Practical Streptomyces genetics, 2nd edn. John Innes Centre, Norwich
Pujić P, Durajlija-Žinić S, Pandža S et al (2001) Ribosomal RNA operons in Streptomyces rimosus: Sequence of the rrnF and aomparative analysis of rrn promoter regions. Food Technol Biotechnol 39:77–81
Ueda K, Seki T, Kudo T, Yoshida T et al (1999) Two distinct mechanisms cause heterogeneity of 16S rRNA. J Bacteriol 181:78–82
Acknowledgements
This work was supported by grants from the 21C Frontier Microbial Genomics and Application Center Program of the Korean Ministry of Science and Technology and Seoul R&BD program (10543).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kim, HL., Song, WS., Kim, K. et al. Characterization of Heterogeneous LSU rRNA Profiles in Streptomyces coelicolor Under Different Growth Stages and Conditions. Curr Microbiol 57, 537–541 (2008). https://doi.org/10.1007/s00284-008-9238-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00284-008-9238-1