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Article Abstract
Plant type Ⅲ polyketide synthases (PKSs), the pivotal enzymes in the biosynthesis of polyketides, produce backbones of many structurally diverse and functionally different polyketides. So far, a variety of functionally diverse plant type Ⅲ PKSs have been cloned and identified from plant origin. Site-directed mutagenesis is a useful technique to study the complex relationship between protein structure and function. This review summarized advances in the structure-function relation of plant type Ⅲ polyketide synthases by site-directed mutagenesis in recent years, including the modification of the amino acid residues influencing enzyme architectures (such as controlling the specificity of starter substrates, the number of condensation reactions, and the cyclization reactions of the intermediate product). This review provides information to study the structure-function relation of plant type Ⅲ polyketide synthases.
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