Nucleotide second messenger-mediated regulation of a muralytic enzyme in Streptomyces.
Mol Microbiol
; 96(4): 779-95, 2015 May.
Article
in En
| MEDLINE
| ID: mdl-25682701
ABSTRACT
Peptidoglycan degradative enzymes have important roles at many stages during the bacterial life cycle, and it is critical that these enzymes be stringently regulated to avoid compromising the integrity of the cell wall. How this regulation is exerted is of considerable interest promoter-based control and protein-protein interactions are known to be employed; however, other regulatory mechanisms are almost certainly involved. In the actinobacteria, a class of muralytic enzymes - the 'resuscitation-promoting factors' (Rpfs) - orchestrates the resuscitation of dormant cells. In this study, we have taken a holistic approach to exploring the mechanisms governing RpfA function using the model bacterium Streptomyces coelicolor and have uncovered unprecedented multilevel regulation that is coordinated by three second messengers. Our studies show that RpfA is subject to transcriptional control by the cyclic AMP receptor protein, riboswitch-mediated transcription attenuation in response to cyclic di-AMP, and growth stage-dependent proteolysis in response to ppGpp accumulation. Furthermore, our results suggest that these control mechanisms are likely applicable to cell wall lytic enzymes in other bacteria.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacterial Proteins
/
Aconitate Hydratase
/
Peptidoglycan
/
Second Messenger Systems
/
Gene Expression Regulation, Bacterial
/
Streptomyces coelicolor
/
Guanine Nucleotides
Type of study:
Prognostic_studies
Language:
En
Journal:
Mol Microbiol
Journal subject:
BIOLOGIA MOLECULAR
/
MICROBIOLOGIA
Year:
2015
Document type:
Article
Affiliation country: