Results 151 to 160 of about 59,813 (190)
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Shrimp chitin as substrate for fungal chitin deacetylase
Applied Microbiology and Biotechnology, 2001The fungal chitin deacetylases (CDA) studied so far are able to perform heterogeneous enzymatic deacetylation on their solid substrate, but only to a limited extent. Kinetic data show that about 5-10% of the N-acetyl glucosamine residues are deacetylated rapidly. Thereafter enzymatic deacetylation is slow.
N N, Win, W F, Stevens
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Carbohydrate Polymers, 2023
Chitin deacetylase (CDA) catalyzing the deacetylation of crystal chitin is a crucial step in the biosynthesis of chitosan, and also a scientific problem to be solved, which restricts the high-value utilization of chitin resources. This study aims to improve the catalytic efficiency of AsCDA from Acinetobacter schindleri MCDA01 by a semi-rational design
Guang, Yang +8 more
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Chitin deacetylase (CDA) catalyzing the deacetylation of crystal chitin is a crucial step in the biosynthesis of chitosan, and also a scientific problem to be solved, which restricts the high-value utilization of chitin resources. This study aims to improve the catalytic efficiency of AsCDA from Acinetobacter schindleri MCDA01 by a semi-rational design
Guang, Yang +8 more
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Recent Patents on Biotechnology, 2013
Chitin is an extremely insoluble material with very limited industrial use; however it can be deacetylated to soluble chitosan which has a wide range of applications. The enzymatic deacetylation of various chitin samples was investigated using the bacterial chitin deacetylase (CDA), which was partially purified from Alcaligenes sp.
Ahmed, ElMekawy +3 more
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Chitin is an extremely insoluble material with very limited industrial use; however it can be deacetylated to soluble chitosan which has a wide range of applications. The enzymatic deacetylation of various chitin samples was investigated using the bacterial chitin deacetylase (CDA), which was partially purified from Alcaligenes sp.
Ahmed, ElMekawy +3 more
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The chitin deacetylase PoCda7 is involved in the pathogenicity of Pyricularia oryzae
Microbiological Research, 2021The fungal cell wall plays an essential role in maintaining cellular integrity and facing complex and changing environmental conditions. Whether a fungus successfully invades a host depends on whether it evades the plant's innate immune system, which recognizes the conserved components of the fungal cell wall, such as chitin.
Meng-Di, Dai +5 more
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Chitin deacetylases: new, versatile tools in biotechnology
Trends in Biotechnology, 2000Chitin deacetylases have been identified in several fungi and insects. They catalyse the hydrolysis of N-acetamido bonds of chitin, converting it to chitosan. Chitosans, which are produced by a harsh thermochemical procedure, have several applications in areas such as biomedicine, food ingredients, cosmetics and pharmaceuticals.
I, Tsigos +3 more
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Chitin deacetylase product inhibition
Biotechnology Journal, 2010AbstractChitin deacetylase is the only known enzyme catalyzing the hydrolysis of the acetamino linkage in the N‐acetylglucosamine units of chitin and chitosan. This reaction can play an important role in enzymatic production of chitosan from chitin, or in enzymatic modification of chitosan, which has applications in medicine, pharmacy or plant ...
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Chitin Deacetylases in Invertebrates
1986Chit in deacetylase activities have been characterised from fungi in those cases where the resulting chitosan forms a structural component of the wall, and from chitinoclastic bacteria. Here are two accounts of their activity in invertebrates, being apparently associated here in softening of chitinous tissues to allow their expansion.
G. W. Gooday +3 more
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Characterization and cloning of chitin deacetylases from Rhizopus circinans
Protein Expression and Purification, 2008Chitin deacetylase catalyzes hydrolysis of the acetamido groups of N-acetylglucosamine of chitin in fungal cell walls. Here a chitin deacetylase secreted by Rhizopus circinans was purified to homogeneity and partially characterized. The enzyme exhibits an apparent molecular weight of approximately 75kDa.
Gauthier, Carole +3 more
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Purification and Characterization of Chitin Deacetylase from Absidia coerulea
Journal of Biochemistry, 1995Chitin deacetylase, which releases the acetyl groups of glycol chitin was purified from a fungus, Absidia coerulea, and characterized. The enzyme was purified 516-fold to homogeneity by means of 65-80% ammonium sulfate precipitation followed by chromatography on Butyl Toyoperal-650M, Gigapite (hydroxyapatite), and DEAE Toyopearl-650M.
X D, Gao, T, Katsumoto, K, Onodera
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Chitin deacetylase from Colletotrichum lindemuthianum
1988Publisher Summary Chitin, a β-1,4-1inked homopolymer of N-acetyl-D-glucosamine, is accompanied in the walls of various fungi by chitosan, a polymer similar to chitin by lacking the N-acetyl groups. Chitosan is most likely synthesized by partial deacetylation of the nascent chain of chitin once the latter is formed by chitin synthase from UDP-GlcNAc ...
Heinrich Kauss, Bärbel Bauch
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