Highly plastic genome of Microcystis aeruginosa PCC 7806, a ubiquitous toxic freshwater cyanobacterium

BMC Genomics

Table 6 Gene clusters involved in the biosynthesis of secondary metabolites

Strain (a)	Size Mb	% SM (b)	PKS				NRPS		Patellamide like
			Modular type I	Iterative type I/glycolipid synthase (c)	Enedyine type	PKS III	NRPS/PKS	NRPS
Mic-PCC7806	5.2*	3.5	1	0	1	1 (d)	2	1	1
Mic-NIES843	5.8	2.6	1	0	1	0	2	1	0
Cwa-WH8501	6.2*	1.6	0	0	0	0	1	6 (e)	0
Npu-PCC73102	8.2	4.5	2	2	0	0	6	1	0
Syn-PCC6803	3.6	0	0	0	0	0	0	0	0

(a) See the Methods section for the strain identifiers.
(b) %SM: percentage of the genome dedicated to secondary metabolites of the non-ribosomal peptide, polyketide or patellamide type family.
(c) Iterative PKS I not including enedyine type.
(d) PKS III is associated with modular PKS I.
(e) NRPS clusters in Cwa-WH8501 are all of a small size with an average of 1–2 genes per cluster.
* in-finishing genome; Mb: megabases; PKS: polyketide synthase; NRPS: non-ribosomal peptide synthetase.

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