A novel plasmid, pSAA0430-08, from Streptococcus anginosus subsp. anginosus strain 0430-08.

Abstract:

:Mobile genetic elements (MGEs) are the genetic material often involved in the interspecies and intraspecies genetic transduction in bacteria. However, little is known about MGEs in the Anginosus group of streptococci (AGS), one of the streptococcal groups found in the oral cavity of humans. We looked for the presence of MGEs in Streptococcus anginosus subsp. anginosus (SAA), a representative species belonging to AGS, and found a novel plasmid from SAA strain 0430-08. This plasmid was 7038bp and ~31% G/C content which we named pSAA0430-08, and examined its genetic structure and characteristics. Open reading frame (ORF) prediction revealed that pSAA0430-08 was composed of 10 ORFs including a putative plasmid replication protein (ORF1) and a putative toxin-antitoxin system (ORF9 and ORF10). Between ORF10 and ORF 1, four tandem repeats of 22bp each, generally termed as iteron, were also observed. Using variant plasmids of pSAA0430-08, we confirmed that both ORF1 and iteron were necessary for replication in host cells. Interestingly, the region from ORF4 to ORF7 showed homology with a genomic DNA segment of S. gordonii strains. Thus, this plasmid may travel between the different species in Streptococci, i.e., S. gordonii and S. anginosus.

journal_name

Plasmid

journal_title

Plasmid

authors

Tabata A,Deutsch D,Otsuka S,Verratti K,Tomoyasu T,Nagamune H,Fischetti VA

doi

10.1016/j.plasmid.2018.01.002

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

16-27

eissn

0147-619X

issn

1095-9890

pii

S0147-619X(17)30130-0

journal_volume

95

pub_type

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