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Enhanced Degradation of Insoluble Chitin: Engineering High-Efficiency Chitinase Fusion Enzymes for Sustainable Applications

SSRN, ISSN: 1556-5068
2024
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  • Usage
    18

Article Description

N-acetyl-D-glucosamine (GlcNAc) and its dimer (GlcNAc)2 are degradation products of chitin waste with great potential in therapeutic and agricultural applications. However, the hydrolysis of insoluble chitin by chitinases remains a major bottleneck. This study investigated the biochemical properties and catalytic mechanisms of PoChi chitinase obtained from Penicillium oxalicum with a focus on enhancing its efficiency during the degradation of insoluble chitin. Recombinant plasmids were engineered to incorporate chitin-binding (ChBD) and/or fibronectin III (FnIII) domains. Notably, PoChi-FnIII-ChBD exhibited the highest substrate affinity (Km = 2.675 mg/mL) and a specific activity of 15.44 U/mg, which surpass those of previously reported chitinases. Our findings propose a novel strategy for the optimization of chitinases, paving the way for industrial biotechnology applications that advance environmental sustainability and efficient utilization of chitinous waste.

Bibliographic Details

Xiao Chen; Li Pang; Tao Wen Yang; Hong Tian; Jin You Yi; Bo Xia

Elsevier BV

Multidisciplinary; Chitin degradation; Chitinase; N-acetyl-D-glucosamine (GlcNAc); Chitin-binding domain; Fibronectin III domain

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