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Journal of Tea Science ›› 2011, Vol. 31 ›› Issue (1): 33-39.doi: 10.13305/j.cnki.jts.2011.01.006

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Bioinformatic Analysis and Prokaryotic Expression of Polyphenol Oxidase Gene in Tea Plant (Camellia sinensis)

WANG Nai-dong, ZHANG Li-xia*, XIANG Qin-zeng, LI Wei-wei   

  1. College of horticμlture science and engineering, state key laboratory of crop biology, Tai,an 271018, China
  • Received:2010-04-22 Revised:2010-06-30 Online:2011-02-15 Published:2019-09-06

Abstract: The polyphenol oxidase (PPO, GenBank accession No. DQ812086) gene was amplified by PCR. Bioinformatics analysis indicated that the cds of PPO DNA sequence is 1800bp, which encoded a protein of 599 amino acid residues (molecular formula: C3008H4677N813O900S18) and predicted that it had two Cu-band functional domains with no transmembrane. The phylogeny analysis showed that it has a most close phylogenetic relationship with Camellia nitidissima. The PPO was cloned into pET28a vector to construct recombination prokaryotic expression vector pET-ppo. After transformed to E1coli BL21 and induced by isopropyl-β-D-thiogalactopyranoside(IPTG), recombinant protein about 71kD was expressed in pET28a system and separated by SDS-PAGE electrophoresis.

Key words: polyphenol oxidase, bioinformatics analysis, prokaryotic expression

CLC Number: