Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/50543
Title: Molecular modeling of peroxidase and polyphenol Oxidase: Substrate specificity and active site comparison
Authors: Prontipa Nokthai
Vannajan Sanghiran Lee
Lalida Shank
Keywords: Biochemistry, Genetics and Molecular Biology
Chemical Engineering
Chemistry
Computer Science
Issue Date: 1-Sep-2010
Abstract: Peroxidases (POD) and polyphenol oxidase (PPO) are enzymes that are well known to be involved in the enzymatic browning reaction of fruits and vegetables with different catalytic mechanisms. Both enzymes have some common substrates, but each also has its specific substrates. In our computational study, the amino acid sequence of grape peroxidase (ABX) was used for the construction of models employing homology modeling method based on the X-ray structure of cytosolic ascorbate peroxidase from pea (PDB ID:1APX), whereas the model of grape polyphenol oxidase was obtained directly from the available X-ray structure (PDB ID:2P3X). Molecular docking of common substrates of these two enzymes was subsequently studied. It was found that epicatechin and catechin exhibited high affinity with both enzymes, even though POD and PPO have different binding pockets regarding the size and the key amino acids involved in binding. Predicted binding modes of substrates with both enzymes were also compared. The calculated docking interaction energy of trihydroxybenzoic acid related compounds shows high affinity, suggesting specificity and potential use as common inhibitor to grape ascorbate peroxidase and polyphenol oxidase. © 2010 by the authors; licensee MDPI, Basel, Switzerland.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77958530134&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50543
ISSN: 14220067
Appears in Collections:CMUL: Journal Articles

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