Complete Genome Sequence of Microcystis aeruginosa NIES-2481 and Common Genomic Features of Group G M. aeruginosa

Haruyo Yamaguchi^1✉, Shigekatsu Suzuki¹, Yasunori Osana², Masanobu Kawachi¹

1. Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
2. Department of Electrical and Electronics Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan

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Citation:
Yamaguchi H, Suzuki S, Osana Y, Kawachi M. Complete Genome Sequence of Microcystis aeruginosa NIES-2481 and Common Genomic Features of Group G M. aeruginosa. J Genomics 2018; 6:30-33. doi:10.7150/jgen.24935. Available from https://www.jgenomics.com/v06p0030.htm

Abstract

Microcystis aeruginosa is a freshwater bloom-forming cyanobacterium that is distributed worldwide. M. aeruginosa can be divided into at least 8 phylogenetic groups (A-G and X) at the intraspecific level. Here, we report the complete genome sequence of M. aeruginosa NIES-2481, which was isolated from Lake Kasumigaura, Japan, and is assigned to group G. The complete genome sequence of M. aeruginosa NIES-2481 comprises a 4.29-Mbp circular chromosome and a 147,539-bp plasmid; the circular chromosome and the plasmid contain 4,332 and 167 protein-coding genes, respectively. Comparative analysis with the complete genome of M. aeruginosa NIES-2549, which belongs to the same group with NIES-2481, showed that the genome size is the smallest level in previously sequenced M. aeruginosa strains, and the genomes do not contain a microcystin biosynthetic gene cluster in common. Synteny analysis revealed only small-scale rearrangements between the two genomes.

Keywords: algal bloom, cyanobacteria, genome, Microcystis