Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts

Schwientek P, Neshat A, Kalinowski J, Klein A, Rückert C, Schneiker-Bekel S, Wendler S, Stoye J, Pühler A (2014)
Journal of Biotechnology 190: 85-95.

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Abstract
: Actinoplanes sp. SE50/110 is the producer of the alpha-glucosidase inhibitor acarbose, which is an economically relevant and potent drug in the treatment of type-2 diabetes mellitus. In this study, we present the detection of transcription start sites on this genome by sequencing enriched 5'-ends of primary transcripts. Altogether, 1,427 putative transcription start sites were initially identified. With help of the annotated genome sequence, 661 transcription start sites were found to belong to the leader region of protein-coding genes with the surprising result that roughly 20% of these genes rank among the class of leaderless transcripts. Next, conserved promoter motifs were identified for protein-coding genes with and without leader sequences. The mapped transcription start sites were finally used to improve the annotation of the Actinoplanes sp. SE50/110 genome sequence. Concerning protein-coding genes, 41 translation start sites were corrected and 9 novel protein-coding genes could be identified. In addition to this, 122 previously undetermined non-coding RNA (ncRNA) genes of Actinoplanes sp. SE50/110 were defined. Focusing on antisense transcription start sites located within coding genes or their leader sequences, it was discovered that 96 of those ncRNA genes belong to the class of antisense RNA (asRNA) genes. The remaining 26 ncRNA genes were found outside of known protein-coding genes. Four chosen examples of prominent ncRNA genes, namely the transfer messenger RNA gene ssrA, the ribonuclease P class A RNA gene rnpB, the cobalamin riboswitch RNA gene cobRS, and the selenocysteine-specific tRNA gene selC, are presented in more detail. This study demonstrates that sequencing of enriched 5'-ends of primary transcripts and the identification of transcription start sites are valuable tools for advanced genome annotation of Actinoplanes sp. SE50/110 and most probably also for other bacteria.
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Schwientek P, Neshat A, Kalinowski J, et al. Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts. Journal of Biotechnology. 2014;190:85-95.
Schwientek, P., Neshat, A., Kalinowski, J., Klein, A., Rückert, C., Schneiker-Bekel, S., Wendler, S., et al. (2014). Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts. Journal of Biotechnology, 190, 85-95.
Schwientek, P., Neshat, A., Kalinowski, J., Klein, A., Rückert, C., Schneiker-Bekel, S., Wendler, S., Stoye, J., and Pühler, A. (2014). Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts. Journal of Biotechnology 190, 85-95.
Schwientek, P., et al., 2014. Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts. Journal of Biotechnology, 190, p 85-95.
P. Schwientek, et al., “Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts”, Journal of Biotechnology, vol. 190, 2014, pp. 85-95.
Schwientek, P., Neshat, A., Kalinowski, J., Klein, A., Rückert, C., Schneiker-Bekel, S., Wendler, S., Stoye, J., Pühler, A.: Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts. Journal of Biotechnology. 190, 85-95 (2014).
Schwientek, Patrick, Neshat, Armin, Kalinowski, Jörn, Klein, Andreas, Rückert, Christian, Schneiker-Bekel, Susanne, Wendler, Sergej, Stoye, Jens, and Pühler, Alfred. “Improving the genome annotation of the acarbose producer Actinoplanes sp. SE50/110 by sequencing enriched 5'-ends of primary transcripts”. Journal of Biotechnology 190 (2014): 85-95.
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Comprehensive proteome analysis of Actinoplanes sp. SE50/110 highlighting the location of proteins encoded by the acarbose and the pyochelin biosynthesis gene cluster.
Wendler S, Otto A, Ortseifen V, Bonn F, Neshat A, Schneiker-Bekel S, Walter F, Wolf T, Zemke T, Wehmeier UF, Hecker M, Kalinowski J, Becher D, Puhler A., J Proteomics 125(), 2015
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