Identification of a transcription factor, PunR, that regulates the purine and purine nucleoside transporter punC in E. coli.
Commun Biol
; 4(1): 991, 2021 08 19.
Article
in En
| MEDLINE
| ID: mdl-34413462
ABSTRACT
Many genes in bacterial genomes are of unknown function, often referred to as y-genes. Recently, the analytic methods have divided bacterial transcriptomes into independently modulated sets of genes (iModulons). Functionally annotated iModulons that contain y-genes lead to testable hypotheses to elucidate y-gene function. The inversely correlated expression of a putative transporter gene, ydhC, relative to purine biosynthetic genes, has led to the hypothesis that it encodes a purine-related transporter and revealed a LysR-family regulator, YdhB, with a predicted 23-bp palindromic binding motif. RNA-Seq analysis of a ydhB knockout mutant confirmed the YdhB-dependent activation of ydhC in the presence of adenosine. The deletion of either the ydhC or the ydhB gene led to a substantially decreased growth rate for E. coli in minimal medium with adenosine, inosine, or guanosine as the nitrogen source. Taken together, we provide clear evidence that YdhB activates the expression of the ydhC gene that encodes a purine transporter in E. coli. We propose that the genes ydhB and ydhC be re-named as punR and punC, respectively.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Membrane Transport Proteins
/
Purines
/
Transcription Factors
/
Escherichia coli Proteins
/
Nucleoside Transport Proteins
Type of study:
Diagnostic_studies
/
Prognostic_studies
Language:
En
Journal:
Commun Biol
Year:
2021
Document type:
Article
Affiliation country:
Estados Unidos