Stereochemistry of decarboxylation of trans-4-hydroxycinnamic acid by Aerobacter.
نویسنده
چکیده
The stereochemistry of the decarboxylation of trans-p-coumaric acid to 4-hydroxystyrene by Aerobacter aerogenes has been examined. The decarboxylation has been found to proceed with retention of the geometry about the trans-substituted double-bond.
منابع مشابه
Enzyme Reactions with Phenolic Compounds: Formation Hydroxystyrenes through the Decarboxylation of PHydroxycinnamic Acids by Aerobacter*
A constitutive enzyme present in strains of Aerobacter has been found to decarboqdate phenylacrylic (cinnamic) acids possessing a 4-hydroxy group to the corresponding hydroxystyrenes nonoxidatively. Two such products, 4-hydroxystyrene (4-vinylphenol) and 3 ,Cdihydroxystyrene (4-vinylcatechol) from p-coumaric and caffeic acids, respectively, were purified and identified. Only 4-hydroxystyrene ha...
متن کاملEnzyme reactions with phenolic compounds: formation of hydroxystyrenes through the decarboxylation of 4-hydroxycinnamic acids by Aerobacter.
A constitutive enzyme present in strains of Aerobacter has been found to decarboqdate phenylacrylic (cinnamic) acids possessing a 4-hydroxy group to the corresponding hydroxystyrenes nonoxidatively. Two such products, 4-hydroxystyrene (4-vinylphenol) and 3 ,Cdihydroxystyrene (4-vinylcatechol) from p-coumaric and caffeic acids, respectively, were purified and identified. Only 4-hydroxystyrene ha...
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Seven strains of Lactobacillus isolated from malt whisky fermentations and representing Lactobacillus brevis, L. crispatus, L. fermentum, L. hilgardii, L. paracasei, L. pentosus, and L. plantarum contained genes for hydroxycinnamic acid (p-coumaric acid) decarboxylase. With the exception of L. hilgardii, these bacteria decarboxylated p-coumaric acid and/or ferulic acid, with the production of 4...
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Background & Aim: Hydroxycinnamic acids are one of the most important bioactive substances of Echinacea drugs. These compounds possess immuno-enhancing activity and thus, total hydroxycinnamic acids are mostly used as the main criterion for quality control of Echinacea purpurea and its drugs. Hence, the quality control of Echinacea requires to develo...
متن کاملp-Coumaric acid decarboxylase from Lactobacillus plantarum: structural insights into the active site and decarboxylation catalytic mechanism.
p-Coumaric acid decarboxylases (PDCs) catalyze the nonoxidative decarboxylation of hydroxycinnamic acids to generate the corresponding vinyl derivatives. Despite the biotechnological relevance of PDCs in food industry, their catalytic mechanism remains largely unknown. Here, we report insights into the structural basis of catalysis for the homodimeric PDC from Lactobacillus plantarum (LpPDC). T...
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ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 72 5 شماره
صفحات -
تاریخ انتشار 1975