The genome sequences of two pyrene-degrading bacterial
strains of Mycobacterium spp. PYR10 and PYR15, isolated
from the estuarine wetland of the Han river, South Korea,
were determined using the PacBio RS II sequencing platform.
The complete genome of strain PYR15 was 6,037,017 bp in
length with a GC content of 66.5%, and contained 5,933 protein-
coding genes. The genome of strain PYR10 was 5,999,427
bp in length with a GC content of 67.7%, and contained
5,767 protein-coding genes. Based on the average nucleotide
identity values, these strains were designated as M. gilvum
PYR10 and M. pallens PYR15. A genomic comparison
of these pyrene-degrading Mycobacterium strains with pyrene-
non-degrading strains revealed that the genomes of
pyrene-degrading strains possessed similar repertoires of ringhydroxylating
dioxygenases (RHDs), including the pyrenehydroxylating
dioxygenases encoded by nidA and nidA3,
which could be readily distinguished from those of pyrenenon-
degraders. Furthermore, genomic islands, containing
catabolic gene clusters, were shared only among the pyrenedegrading
Mycobacterium strains and these gene clusters
contained RHD genes, including nidAB and nidA3B3. Our
genome data should facilitate further studies on the evolution
of the polycyclic aromatic hydrocarbon-degradation
pathways in the genus Mycobacterium.
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