Streptococcus pyogenes upregulates arginine catabolism to exert its pathogenesis on the skin surface.
Cell Rep
; 34(13): 108924, 2021 03 30.
Article
in En
| MEDLINE
| ID: mdl-33789094
ABSTRACT
The arginine deiminase (ADI) pathway has been found in many kinds of bacteria and functions to supplement energy production and provide protection against acid stress. The Streptococcus pyogenes ADI pathway is upregulated upon exposure to various environmental stresses, including glucose starvation. However, there are several unclear points about the advantages to the organism for upregulating arginine catabolism. We show that the ADI pathway contributes to bacterial viability and pathogenesis under low-glucose conditions. S. pyogenes changes global gene expression, including upregulation of virulence genes, by catabolizing arginine. In a murine model of epicutaneous infection, S. pyogenes uses the ADI pathway to augment its pathogenicity by increasing the expression of virulence genes, including those encoding the exotoxins. We also find that arginine from stratum-corneum-derived filaggrin is a key substrate for the ADI pathway. In summary, arginine is a nutrient source that promotes the pathogenicity of S. pyogenes on the skin.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Arginine
/
Skin
/
Streptococcus pyogenes
Type of study:
Etiology_studies
Limits:
Animals
/
Humans
/
Male
Language:
En
Journal:
Cell Rep
Year:
2021
Document type:
Article