Biochemical and Structural Characterization of a Novel Bacterial Tannase From Lachnospiraceae bacterium in Ruminant Gastrointestinal Tract.

ABSTRACT: Tannases are a family of esterases that catalyze the hydrolysis of ester and depside bonds present in hydrolyzable tannins to release gallic acid. Here, a novel tannase from Lachnospiraceae bacterium (TanA_Lb) was characterized. The recombinant TanA_Lb exhibited maximal activity at pH 7.0 and 50°C, and it maintained more than 70% relative activity from 30°C to 55°C. The activity of TanA_Lb was enhanced by Mg²⁺ and Ca²⁺, and was dramatically reduced by Cu²⁺ and Mn²⁺. TanA_Lb is capable of degrading esters of phenolic acids with long-chain alcohols, such as lauryl gallate as well as tannic acid. The Km value and catalytic efficiency (k _cat /Km) of TanA_Lb towar

SUBMITTER: Guan L 

PROVIDER: S-EPMC8715002 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature