Regulation of vanillate and syringate catabolism by a MarR-type transcriptional regulator DesR in Sphingobium sp. SYK-6.
Bacterial Proteins
/ genetics
Gene Expression Regulation, Bacterial
Lignin
/ metabolism
Metabolic Networks and Pathways
/ genetics
Oxidoreductases, O-Demethylating
/ genetics
Promoter Regions, Genetic
/ genetics
Repressor Proteins
/ metabolism
Sphingomonadaceae
/ physiology
Transcription, Genetic
Vanillic Acid
/ metabolism
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
02 12 2019
02 12 2019
Historique:
received:
29
07
2019
accepted:
12
11
2019
entrez:
4
12
2019
pubmed:
4
12
2019
medline:
18
11
2020
Statut:
epublish
Résumé
Vanillate and syringate are major intermediate metabolites generated during the microbial degradation of lignin. In Sphingobium sp. SYK-6, vanillate is O demethylated to protocatechuate by LigM; protocatechuate is then catabolized via the protocatechuate 4,5-cleavage pathway. Syringate is O demethylated to gallate by consecutive reactions catalyzed by DesA and LigM, and then gallate is subjected to ring cleavage by DesB. Here, we investigated the transcriptional regulation of desA, ligM, and desB involved in vanillate and syringate catabolism. Quantitative reverse transcription-PCR analyses indicated that the transcription of these genes was induced 5.8-37-fold in the presence of vanillate and syringate. A MarR-type transcriptional regulator, SLG_12870 (desR), was identified as the gene whose product bound to the desB promoter region. Analysis of a desR mutant indicated that the transcription of desB, ligM, and desR is negatively regulated by DesR. Purified DesR bound to the upstream regions of desB, ligM, and desR, and the inverted repeat sequences similar to each other in these regions were suggested to be essential for DNA binding of DesR. Vanillate and syringate inhibited DNA binding of DesR, indicating that these compounds are effector molecules of DesR. The transcription of desA was found to be regulated by an as-yet unidentified regulator.
Identifiants
pubmed: 31792252
doi: 10.1038/s41598-019-54490-7
pii: 10.1038/s41598-019-54490-7
pmc: PMC6888825
doi:
Substances chimiques
Bacterial Proteins
0
Repressor Proteins
0
Lignin
9005-53-2
Oxidoreductases, O-Demethylating
EC 1.-
vanillate O-demethylase
EC 1.14.13.82
Vanillic Acid
GM8Q3JM2Y8
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
18036Références
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