Cutin, a polymeric structural component of plant cuticles, is a polymer of hydroxy fatty acids that are usually C16 or C18 and contain up to three hydroxy groups. The enzyme from several fungal sources also hydrolyses the p-nitrophenyl esters of hexadecanoic acid. It is however inactive towards several esters that are substrates for non-specific esterases.
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SYSTEMATIC NAME
IUBMB Comments
cutin hydrolase
Cutin, a polymeric structural component of plant cuticles, is a polymer of hydroxy fatty acids that are usually C16 or C18 and contain up to three hydroxy groups. The enzyme from several fungal sources also hydrolyses the p-nitrophenyl esters of hexadecanoic acid. It is however inactive towards several esters that are substrates for non-specific esterases.
cutinases are serine hydrolases that belong to the alpha/beta-hydrolase superfamily, which is divided into 2 eukaryotic and one prokaryotic subgroup, phylogenetic tree, overview. They possess a classical Ser-His-Asp catalytic triad, in which the catalytic serine is exposed to solvent. Because cutinases lack the hydrophobic lid that covers the active site serine in true lipases, the cutinase active site is large enough to accommodate the high-molecular-weight substrate cutin, and some of them can also hydrolyse high-molecular-weight synthetic polyesters
the enzyme possesses a classical Ser-His-Asp catalytic triad, in which the catalytic serine is exposed to solvent. Residues S103 and H173 from Monilinia fructicola cutinase play important roles in catalysis
sequence contains a 20 amino-acid secretory signal, one potential N-linked glycosilation site, a protein kinase C phosphorylation site, a lipase active serine and a cutinase active serine
sequence contains a 20 amino-acid secretory signal, one potential N-linked glycosilation site, a protein kinase C phosphorylation site, a lipase active serine and a cutinase active serine
site-directed mutageneis, the mutant exhibits a slightly increased Km value with the soluble substrate 4-nitrophenyl butyrate compared to the wild-type enzyme
site-directed mutageneis, the mutant exhibits a slightly increased Km value and a 2.3fold higher kcat with the soluble substrate 4-nitrophenyl butyrate compared to the wild-type enzyme
site-directed mutageneis, the mutant exhibits a slightly increased Km valuet with the soluble substrate 4-nitrophenyl butyrate compared to the wild-type enzyme