Spectroscopy and Spectral Analysis, Volume. 32, Issue 2, 317(2012)

Study on the Effect of High Hydrostatic Pressure Treatment on the Secondary Structure of Mushroom Polyphenoloxidase by SRCD and FTIR

YI Jian-yong1,2,3、*, DONG Peng1,2,3, WANG Yong-tao1,2,3, JIANG Bin1,2,3, LIAO Xiao-jun1,2,3, HU Xiao-song1,2,3, and ZHANG Yan1,2,3
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    The secondary structure of the mushroom polyphenoloxidase treated by the high hydrostatic pressure (HHP) was analyzed by the synchrotron radiation circular dichroism (SRCD) and Fourier transform infrared spectroscopy (FTIR). The α-helix content of mushroom PPO was decreased after HHP treatment, which indicated that the secondary structure of PPO was changed. There was a discrepancy of the result of the secondary structure content between untreated or HHP-treated mushroom PPO analyzed by SRCD and FTIR spectra, and this discrepancy may be due to the different determination temperature, the concentration of the PPO solution and the spectra analysis method etc. The fluorescence spectra showed that the fluorescence intensity of the mushroom PPO was decreased after HHP treatment, and a red shift was observed after HHP treatment, which indicated that the tertiary structure of the enzyme molecule has been modified.

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    YI Jian-yong, DONG Peng, WANG Yong-tao, JIANG Bin, LIAO Xiao-jun, HU Xiao-song, ZHANG Yan. Study on the Effect of High Hydrostatic Pressure Treatment on the Secondary Structure of Mushroom Polyphenoloxidase by SRCD and FTIR[J]. Spectroscopy and Spectral Analysis, 2012, 32(2): 317

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    Paper Information

    Received: Jun. 9, 2011

    Accepted: --

    Published Online: Feb. 20, 2012

    The Author Email: Jian-yong YI (yijianyong515@126.com)

    DOI:10.3964/j.issn.1000-0593(2012)02-0317-07

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