Draft genome sequence of the anatoxin-a producing cyanobacterium Tychonema bourrellyi B0820 isolated from the epilimnion of the deep Alpine Lake Garda.

We report the draft genome sequence of strain B0820 of the cyanobacterium Tychonema bourrellyi isolated from the epilimnion of Lake Garda and assembled from a metagenome of a non-axenic culture. The strain analyzed was shown to produce anatoxin-a, a potent neurotoxin that can cause fatal intoxication in exposed organisms.