Participation of the arcRACME protein in self-activation of the arc operon located in the arginine catabolism mobile element in pandemic clone USA300
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Fecha
2017
Título de la revista
Publicado en
Memorias do Instituto Oswaldo Cruz, 1678-8060, Vol, 112, Nro. 7, 2017, p.499-503
Publicado por
Instituto Oswaldo Cruz, Ministério da Saúde
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Resumen
Descripción
Abstract
Staphylococcus aureus pandemic clone USA300 has, in addition to its constitutive arginine catabolism (arc) gene cluster, an arginine catabolism mobile element (ACME) carrying another such cluster, which gives this clone advantages in colonisation and infection. Gene arcR, which encodes an oxygen-sensitive transcriptional regulator, is inside ACME and downstream of the constitutive arc gene cluster, and this situation may have an impact on its activation. Different relative expression behaviours are proven here for arcRACME and the arcACME operon compared to the constitutive ones. We also show that the artificially expressed recombinant ArcRACME protein binds to the promoter region of the arcACME operon; this mechanism can be related to a positive feedback model, which may be responsible for increased anaerobic survival of the USA300 clone during infection-related processes.
Palabras clave
Keywords
USA300 clone, ACME, Transcriptional activator
Temáticas
Staphylococcus aureus
Prueba de complementación genética
Farmacorresistencia microbiana
Prueba de complementación genética
Farmacorresistencia microbiana