Genetic characteristics of novel extreme alkaline-inducible promoter located in five prime upstream region of peptidyl-prolyl cis/trans isomerase from Vibrio anguillarum.

ABSTRACT: This study presents the identification and characterization of the promoter region of Vibrio anguillarum NB10, which enhances the expression of FK506-binding protein (FKBP)-type peptidyl-prolyl cis/trans isomerase (PPIase; FklB), capable of binding to the immunosuppressant FK506 under extremely alkaline conditions. Our proteomic analysis of V. anguillarum NB10 revealed that FklB (VaFklB) expression is significantly upregulated under extreme alkaline stress (pH 10). When the putative core promoter regions were coupled with a β-galactosidase reporter gene and introduced into Escherichia coli, we observed β-galactosidase activities of 61.47 ± 2.91 and 95.83 ± 6.76 Miller units (MU) at pH 9 and 10, respectively, after 4 h of stress exposure. These values represent 1.97- and 2.88-fold increases

SUBMITTER: Kim DG 

PROVIDER: S-EPMC12218036 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature