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J Genomics. 2019 Sep 18;7:56-59. doi: 10.7150/jgen.38149. eCollection 2019.

The Draft Genome of a Hydrogen-producing Cyanobacterium, Arthrospira platensis NIES-46.

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1
Center for Biology and Environmental Studies, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, Japan.

Abstract

Arthrospira is an economically important cyanobacterium that contains many useful products, including proteins, vitamins, lipids, and pigments, and it is distributed in several alkaline soda lakes. Arthrospira platensis NIES-46 produces large amounts of hydrogen. In this study, we sequenced the NIES-46 draft genome and performed comparative analyses among Arthrospira species to elucidate the genomic background of this strain. The genome consists of 5.7 Mbp with a GC% of 44.5% and encodes 5,008 proteins. Our phylogenetic analysis using multiple orthologous proteins shows that Arthrospira is divided into two clades and that NIES-46 is closely related to A. platensis NIES-39. The genome structure and protein functions are highly conserved between A. platensis NIES-39 and NIES-46, suggesting that these two strains have recently diverged. Genes involved in hydrogen production are well-conserved among Arthrospira species, indicating conserved abilities to produce hydrogen.

KEYWORDS:

Arthrospira platensis NIES-46; Spirulina; filamentous cyanobacterium; genome; hydrogen production; phylogeny

Conflict of interest statement

Competing Interests: The authors have declared that no competing interest exists.

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