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A highly sensitive, accurate, and stable method for measuring pectin depolymerase activity

delete2025-01-01
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PRE
AI
Y
Yinchun Liu
刘芳 cover
刘芳 (Fang Liu)
J
Jianrui Liu
J
Jingwen Dong
M
Mingxia Xing
X
Xiangyu Chen
Y
Yanan Wu
张永勤 cover
张永勤 (Yongqin Zhang) *
DOI：10.1016/j.foodchem.2024.141229delete
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Abstract

Abstract

En 中文
Pectin depolymerase is widely utilized in various industrial sectors. However, the traditional methods for determining its enzymatic activity have limitations, such as cumbersome operations and a significant impact of enzyme solution dilution ratios on activity. The 3-methyl-2-benzothiazolinone hydrazone (MBTH) method can be employed to address these issues, but pectin precipitation and strong background commonly arise in this method. We have successfully overcome these challenges by employing a low-temperature and high-alkaline environment, and further optimized the reagent compositions and detection wavelength to improve the method. Consequently, enzyme hydrolysis follows a zero-order reaction within 60 min, which is helpful for the endpoint measurement of pectinase activity. The developed calibration curve for pectinase concentration and hydrolysis rate demonstrates linearity (R-2 = 0.9945) within the range of 2.5-15.8 mU/mL of pectinase. This method exhibits high sensitivity, accuracy, and stability, making it suitable for routine determination of pectin depolymerase activity in research and applications.
Keywords:
MBTH
Pectinase
Pectin
Activity
Precipitation
Determination

Journal

Food Chemistry cover
Food Chemistry
IF:
9.8
Papers:
4.6W
Citations:
24.4W

Organization

No organization information available