UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota

Campbell JH, O'Donoghue P, Campbell AG, Schwientek P, Sczyrba A, Woyke T, Söll D, Podar M (2013)
Proceedings of the National Academy of Sciences of the United States of America 110(14): 5540-5545.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The composition of the human microbiota is recognized as an important factor in human health and disease. Many of our cohabitating microbes belong to phylum-level divisions for which there are no cultivated representatives and are only represented by small subunit rRNA sequences. For one such taxon (SR1), which includes bacteria with elevated abundance in periodontitis, we provide a single-cell genome sequence from a healthy oral sample. SR1 bacteria use a unique genetic code. In-frame TGA (opal) codons are found in most genes (85%), often at loci normally encoding conserved glycine residues. UGA appears not to function as a stop codon and is in equilibrium with the canonical GGN glycine codons, displaying strain-specific variation across the human population. SR1 encodes a divergent tRNA(Gly)UCA with an opal-decoding anticodon. SR1 glycyl-tRNA synthetase acylates tRNA(Gly)UCA with glycine in vitro with similar activity compared with normal tRNA(Gly)UCC. Coexpression of SR1 glycyl-tRNA synthetase and tRNA(Gly)UCA in Escherichia coli yields significant β-galactosidase activity in vivo from a lacZ gene containing an in-frame TGA codon. Comparative genomic analysis with Human Microbiome Project data revealed that the human body harbors a striking diversity of SR1 bacteria. This is a surprising finding because SR1 is most closely related to bacteria that live in anoxic and thermal environments. Some of these bacteria share common genetic and metabolic features with SR1, including UGA to glycine reassignment and an archaeal-type ribulose-1,5-bisphosphate carboxylase (RubisCO) involved in AMP recycling. UGA codon reassignment renders SR1 genes untranslatable by other bacteria, which impacts horizontal gene transfer within the human microbiota.
Erscheinungsjahr
2013
Zeitschriftentitel
Proceedings of the National Academy of Sciences of the United States of America
Band
110
Ausgabe
14
Seite(n)
5540-5545
ISSN
0027-8424
eISSN
1091-6490
Page URI
https://pub.uni-bielefeld.de/record/2563424

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Campbell JH, O'Donoghue P, Campbell AG, et al. UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota. Proceedings of the National Academy of Sciences of the United States of America. 2013;110(14):5540-5545.
Campbell, J. H., O'Donoghue, P., Campbell, A. G., Schwientek, P., Sczyrba, A., Woyke, T., Söll, D., et al. (2013). UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota. Proceedings of the National Academy of Sciences of the United States of America, 110(14), 5540-5545. doi:10.1073/pnas.1303090110
Campbell, J. H., O'Donoghue, P., Campbell, A. G., Schwientek, P., Sczyrba, A., Woyke, T., Söll, D., and Podar, M. (2013). UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota. Proceedings of the National Academy of Sciences of the United States of America 110, 5540-5545.
Campbell, J.H., et al., 2013. UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota. Proceedings of the National Academy of Sciences of the United States of America, 110(14), p 5540-5545.
J.H. Campbell, et al., “UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota”, Proceedings of the National Academy of Sciences of the United States of America, vol. 110, 2013, pp. 5540-5545.
Campbell, J.H., O'Donoghue, P., Campbell, A.G., Schwientek, P., Sczyrba, A., Woyke, T., Söll, D., Podar, M.: UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota. Proceedings of the National Academy of Sciences of the United States of America. 110, 5540-5545 (2013).
Campbell, James H., O'Donoghue, Patrick, Campbell, Alisha G., Schwientek, Patrick, Sczyrba, Alexander, Woyke, Tanja, Söll, Dieter, and Podar, Mircea. “UGA is an additional glycine codon in uncultured SR1 bacteria from the human microbiota”. Proceedings of the National Academy of Sciences of the United States of America 110.14 (2013): 5540-5545.

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