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Cloning, nucleotide sequence, and transcriptional analysis of the nusG gene of Streptomyces coelicolor A3(2), which encodes a putative transcriptional antiterminator

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Abstract

A 3 kb genomic fragment containing the nusG gene of Streptomyces coelicolor A3(2) was identified, cloned and sequenced. Sequence analysis revealed 3 complete and 2 truncated open reading frames (ORFs): truncated ORF∪ (similar to a Bacillus gene encoding a thermostable aspartate aminotransferase)-secE (94 amino acids; 79.0% similarity to Escherichia coli SecE)-nusG (300 amino acids; 73.3% similarity to E. coli NusG)-rplK (144 amino acids; 88.5% similarity to E. coli ribosomal subunit L11)-truncated rplA (similar to E. coli ribosomal subunit L1). The gene organization secE-nusG-rplKA exactly matches that in E. coli. Transcriptional analyses by the primer extension method revealed one transcriptional start site each for secE and nusG, and two sites for rplK. The presence of promoters was also confirmed with the aid of a promoter-probe vector.

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Authors and Affiliations

  1. Department of Biotechnology, Faculty of Engineering, Osaka University, 2-1 Yamada-oka, 565, Suita, Osaka, Japan

    Chunya Puttikhunt, Takuya Nihira & Yasuhiro Yamada

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  1. Chunya Puttikhunt
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  2. Takuya Nihira
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  3. Yasuhiro Yamada
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Communicated by J. F. Lengeler

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Puttikhunt, C., Nihira, T. & Yamada, Y. Cloning, nucleotide sequence, and transcriptional analysis of the nusG gene of Streptomyces coelicolor A3(2), which encodes a putative transcriptional antiterminator. Molec. Gen. Genet. 247, 118–122 (1995). https://doi.org/10.1007/BF00425829

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  • DOI: https://doi.org/10.1007/BF00425829

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