Title : Characterization of Cinnamoyl Esterases from Different Lactobacilli and Bifidobacteria - Fritsch_2017_Curr.Microbiol_74_247 |
Author(s) : Fritsch C , Jansch A , Ehrmann MA , Toelstede S , Vogel RF |
Ref : Curr Microbiol , 74 :247 , 2017 |
Abstract :
A high variety of plants that are used for food production contain esterified hydroxycinnamic acids. As their free forms display several benefits, like an enhanced absorption in human intestinal tract, anti-oxidative and anti-carcinogenic effects, an improved protein solubility and reduced discoloration, the microbial ability to cleave the ester bond is highly desired. In order to examine potential fermentation strains for this purpose, six different lactic acid bacteria and one bifidobacterial strain were screened for their ability to degrade esterified hydroxycinnamic acids because these strains are commonly used for fermentation of plant-based foods. Moreover, their cinnamoyl esterase activity was examined by molecular biological analyses. The enzymes were heterologously expressed in Escherichia coli, purified and biochemically characterized. The purified esterases with a molecular mass around 27-29 kDa had their optimum predominantly between pH 7 and 8 at 20-30 degreesC. Bifidobacterium animalis subsp. lactis, Lactobacillus gasseri, Lactobacillus acidophilus, Lactobacillus plantarum and Lactobacillus fermentum displayed activities against a broad substrate range (methyl caffeate, methyl trans-p-coumarate, chlorogenic acid as well as partially ethyl ferulate). Concerning substrate affinity, reaction velocity, thermal and pH stability, Lactobacillus gasseri showed the overall best performance. The herein studied lactic acid- and bifidobacteria are promising for the production of fermented plant-based foods with an increased quality and nutritional value. |
PubMedSearch : Fritsch_2017_Curr.Microbiol_74_247 |
PubMedID: 27999938 |
Gene_locus related to this paper: limf3-b2gdc2 , lache-u6f2k7 , bifa0-b8du06 , lacac-q5fi30 , lacga-q040s2 , lacpl-LP.2953 , lacre-q2bvr2 |
Substrate | Ara1F FAXG Chlorogenic-acid Ethyl-ferulate |
Gene_locus | limf3-b2gdc2 lache-u6f2k7 bifa0-b8du06 lacac-q5fi30 lacga-q040s2 lacpl-LP.2953 lacre-q2bvr2 |
Family | FAE-Bacterial-promiscuous |
Fritsch C, Jansch A, Ehrmann MA, Toelstede S, Vogel RF (2017)
Characterization of Cinnamoyl Esterases from Different Lactobacilli and Bifidobacteria
Curr Microbiol
74 :247
Fritsch C, Jansch A, Ehrmann MA, Toelstede S, Vogel RF (2017)
Curr Microbiol
74 :247