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  • Shambat, SM (author)

A point mutation in AgrC determines cytotoxic or colonizing properties associated with phenotypic variants of ST22 MRSA strains

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-08-11
  • Springer Science and Business Media LLC,2016

Numbers

  • LIBRIS-ID:oai:prod.swepub.kib.ki.se:134037493
  • http://kipublications.ki.se/Default.aspx?queryparsed=id:134037493URI
  • https://doi.org/10.1038/srep31360DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of skin and soft tissue infections. One of the highly successful and rapidly disseminating clones is MRSA ST22 commonly associated with skin tropism. Here we show that a naturally occurring single amino acid substitution (tyrosine to cysteine) at position 223 of AgrC determines starkly different ST22 S. aureus virulence phenotypes, e.g. cytotoxic or colonizing, as evident in both in vitro and in vivo skin infections. Y223C amino acid substitution destabilizes AgrC-AgrA interaction leading to a colonizing phenotype characterized by upregulation of bacterial surface proteins. The colonizing phenotype strains cause less severe skin tissue damage, show decreased susceptibility towards the antimicrobial LL-37 and induce autophagy. In contrast, cytotoxic strains with tyrosine at position 223 of AgrC cause infections characterized by inflammasome activation and severe skin tissue pathology. Taken together, the study demonstrates how a single amino acid substitution in the histidine kinase receptor AgrC of ST22 strains determines virulence properties and infection outcome.

Added entries (persons, corporate bodies, meetings, titles ...)

  • Siemens, NKarolinska Institutet (author)
  • Monk, IR (author)
  • Mohan, DB (author)
  • Mukundan, S (author)
  • Krishnan, KC (author)
  • Prabhakara, S (author)
  • Snall, JKarolinska Institutet (author)
  • Kearns, A (author)
  • Vandenesch, F (author)
  • Svensson, MKarolinska Institutet (author)
  • Kotb, M (author)
  • Gopal, B (author)
  • Arakere, G (author)
  • Norrby-Teglund, AKarolinska Institutet (author)
  • Karolinska Institutet (creator_code:org_t)

Related titles

  • In:Scientific reports: Springer Science and Business Media LLC6, s. 31360-2045-2322

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