Some properties of p-coumarate decarboxylase from Cladosporium phlei.
Can J Microbiol, 1976/9;22(9):1258-62.
PMID: 10068
Impact factor: 3.226
Abstract
The optimal pH and temperature of p-coumarate decarboxylase were 6.0 and 23 degrees C respectively. The enzyme activity was reduced to three quarters by heat treatment at 35 degrees C for 5 min and by half at 25 degrees C in 24 h, but kept almost unchanged at -20 degrees C at least for 10 days. The activity was not inhibited by potassium cyanide, sodium diethyldithiocarbamate, ethylenediaminetetraacetic acid disodium salt, or sodium citrate at 10 mM concentration, but was inhibited by p-chloromercuribenzoate or iodoacetate at 0.1 mM, the inhibition by the former being prevented to a great extent by the presence of reduced glutathione or dithiothreitol. The activity was inhibited by maleic acid cinnamic acid, or p-methoxycinnamic acid, but not by fumaric acid, acrylic acid, p-hydroxystyrene, furcatin p-hydroxyphenylacetic acid, or phloretic acid. An unsubstituted p-hydroxy group on the benzene ring and an acrylic acid side chain were required for the enzyme activity. Km value for trans-p-coumaric acid was about 6.5 X 10(-4) M.
MeSH terms
Carbon Dioxide; Carboxy-Lyases; Chloromercuribenzoates; Cinnamates; Cladosporium; Coumaric Acids; Hydrogen-Ion Concentration; Iodoacetates; Maleates; Mitosporic Fungi; Stereoisomerism; Temperature
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