Participation of the arcRACME protein in self-activation of the arc operon located in the arginine catabolism mobile element in pandemic clone USA300
Document title: Participation of the arcRACME protein in self-activation of the arc operon located in the arginine catabolism mobile element in pandemic clone USA300
Journal: Memorias do Instituto Oswaldo Cruz
Database: PERIÓDICA
System number: 000405567
ISSN: 0074-0276
Authors: 1
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1
1
1
Institutions: 1Universidad El Bosque, Laboratorio de Genética Molecular Bacteriana, Bogotá. Colombia
Year:
Season: Jul
Volumen: 112
Number: 7
Pages: 499-503
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English 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
Disciplines: Medicina
Keyword: Bacterias,
Bioquímica,
Regulación génica,
Catabolismo,
Arginina,
Activadores de la transcripción,
Staphylococcus aureus
Keyword: Medicine,
Bacteria,
Biochemistry,
Gene regulation,
Catabolism,
Arginine,
Transcription activators,
Staphylococcus aureus
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