[H-CG34] [JJ] Systems of life in closed bio-ecosystems and planets

[HCG34-04] Draft genome sequence analysis of the extreme environment grown cyanobacterium, Nostoc sp. HK-01 (NIES-2109)

*Hiroshi Katoh¹, Shunta Kimura², Yu Kanesaki³, Takatomo Fujisawa⁴, Yasukazu Nakamura⁴, Hirofumi Yoshikawa³, Kaori Tomita-Yokotani² (1.Mie University, 2.University of Tsukuba, 3.Tokyo University of Agriculture, 4.National Institute of Genetics)

Keywords:cyanobacteria, extreme environment, genome, space

Cyanobacteria are photosynthetic organisms to produce oxygen on the earth for our life. Terrestrial cyanobacteria are living in extreme environment. Isikurage (Nostoc commune) is a nitrogen-fixing terrestrial cyanobacterium and living ranging from polar to desert. Nostoc sp. HK-01 (NIES-2109, hereafter HK-01) was isolated from crust of Isikurage. Previous reports suggest that HK-01 survives under low vacuum condition such as Mars and that dried HK-01 tolerates for high temperature and high gamma-ray radiation. HK-01 has expected to utilize for space environment. Recently, we determined a draft genome sequence of HK-01. Here, we are trying to analyze HK-01 genes in silico and will discuss material cycle and stress tolerance.