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Clinical strains of Streptococcus agalactiae carry two different variants of pathogenicity island XII

E. Kuleshevich, J. Ferretti, I. Santos Sanches, N. Balasubramanian, B. Spellerberg, A. Efstratiou, P. Kriz, K. Grabovskaya, O. Arjanova, A. Savitcheva, V. Shevchenko, A. Rysev, A. Suvorov,

. 2017 ; 62 (5) : 393-399. [pub] 20170318

Language English Country United States

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc18025576

Streptococcus agalactiae or Group B streptococci (GBS) are a common cause of serious diseases of newborns and adults. GBS pathogenicity largely depends on genes located on the accessory genome including several pathogenicity islands (PAI). The present paper is focused on the structure and molecular epidemiological analysis of one of the GBS pathogenicity islands-the pathogenicity island PAI XII (Glaser et al. Mol Microbiol 45(6):1499-1513, 2002). This PAI was found to be composed of three different mobile genetic elements: a composite transposon (PAI-C), a genomic islet (PAI-B), and a pathogenicity island associated with gene sspB1 (PAI-A). PAI-A in GBS has a homolog--PAI-A1 with similar, but a different genetic constellation. PCR-based analysis of GBS collections from different countries revealed that a strains lineage with PAI-A is less common than PAI-A1 and was determined to be present only among the strains obtained from Russia. Our results suggest that PAI-A and PAI-A1 have the same progenitor, which evolved independently and appeared in the GBS genome as separate genetic events. Results of this study reflect specific geographical distribution of the GBS strains with the mobile genetic element under study.

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$a Streptococcus agalactiae or Group B streptococci (GBS) are a common cause of serious diseases of newborns and adults. GBS pathogenicity largely depends on genes located on the accessory genome including several pathogenicity islands (PAI). The present paper is focused on the structure and molecular epidemiological analysis of one of the GBS pathogenicity islands-the pathogenicity island PAI XII (Glaser et al. Mol Microbiol 45(6):1499-1513, 2002). This PAI was found to be composed of three different mobile genetic elements: a composite transposon (PAI-C), a genomic islet (PAI-B), and a pathogenicity island associated with gene sspB1 (PAI-A). PAI-A in GBS has a homolog--PAI-A1 with similar, but a different genetic constellation. PCR-based analysis of GBS collections from different countries revealed that a strains lineage with PAI-A is less common than PAI-A1 and was determined to be present only among the strains obtained from Russia. Our results suggest that PAI-A and PAI-A1 have the same progenitor, which evolved independently and appeared in the GBS genome as separate genetic events. Results of this study reflect specific geographical distribution of the GBS strains with the mobile genetic element under study.
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$a Ferretti, Joseph $u University of Oklahoma Health Sciences Center, 1100 N Lindsay Ave, Oklahoma City, OK, 73104, USA.
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$a Santos Sanches, Ilda $u Research Unit on Applied Molecular Biosciences (UCIBIO@REQUIMTE). Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal.
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$a Grabovskaya, Kornelia $u Institute of Experimental Medicine, Pavlova Street, 12, 197376, Saint-Petersburg, Russia.
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$a Arjanova, Olga $u D. O. Ott Research Institute of Obstetrics and Gynecology, 199034, Mendeleevskaya line, 3, Saint-Petersburg, Russia.
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$a Suvorov, Alexander $u Institute of Experimental Medicine, Pavlova Street, 12, 197376, Saint-Petersburg, Russia. alexander_suvorov1@hotmail.com. Saint-Petersburg State University, 199034, Universitetskaya emb. 7/9, Saint-Petersburg, Russia. alexander_suvorov1@hotmail.com.
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