Počet záznamů: 1
Kingella kingae RtxA Cytotoxin in the Context of Other RTX Toxins
- 1.0556379 - MBÚ 2023 RIV CH eng J - Článek v odborném periodiku
Filipi, Kateřina - Rahman, Waheed Ur - Osičková, Adriana - Osička, Radim
Kingella kingae RtxA Cytotoxin in the Context of Other RTX Toxins.
Microorganisms. Roč. 10, č. 3 (2022), č. článku 518. ISSN 2076-2607. E-ISSN 2076-2607
Grant CEP: GA ČR(CZ) GA22-15825S
Institucionální podpora: RVO:61388971
Klíčová slova: escherichia-coli-hemolysin * adenylate-cyclase toxin * aggregatibacter-actinomycetemcomitans leukotoxin * pasteurella-haemolytica leukotoxin * real-time pcr * polymerase-chain-reaction * outer-membrane vesicles * bordetella-pertussis cyaa * terminal secretion signal * cell-invasive activity * beta(2) integrins * Kingella kingae * membrane * pore-forming * RtxA * RTX toxin
Obor OECD: Microbiology
Impakt faktor: 4.5, rok: 2022
Způsob publikování: Open access
https://www.mdpi.com/2076-2607/10/3/518
The Gram-negative bacterium Kingella kingae is part of the commensal oropharyngeal flora of young children. As detection methods have improved, K. kingae has been increasingly recognized as an emerging invasive pathogen that frequently causes skeletal system infections, bacteremia, and severe forms of infective endocarditis. K. kingae secretes an RtxA cytotoxin, which is involved in the development of clinical infection and belongs to an ever-growing family of cytolytic RTX (Repeats in ToXin) toxins secreted by Gram-negative pathogens. All RTX cytolysins share several characteristic structural features: (i) a hydrophobic pore-forming domain in the N-terminal part of the molecule, (ii) an acylated segment where the activation of the inactive protoxin to the toxin occurs by a co-expressed toxin-activating acyltransferase, (iii) a typical calcium-binding RTX domain in the C-terminal portion of the molecule with the characteristic glycine- and aspartate-rich nonapeptide repeats, and (iv) a C-proximal secretion signal recognized by the type I secretion system. RTX toxins, including RtxA from K. kingae, have been shown to act as highly efficient 'contact weapons' that penetrate and permeabilize host cell membranes and thus contribute to the pathogenesis of bacterial infections. RtxA was discovered relatively recently and the knowledge of its biological role remains limited. This review describes the structure and function of RtxA in the context of the most studied RTX toxins, the knowledge of which may contribute to a better understanding of the action of RtxA in the pathogenesis of K. kingae infections.
Trvalý link: http://hdl.handle.net/11104/0331349
Počet záznamů: 1