食品科学 ›› 2012, Vol. 33 ›› Issue (2): 219-223.doi: 10.7506/spkx1002-6630-201202048

• 分析检测 • 上一篇    下一篇

质谱法测定4种真菌毒素与载体蛋白偶联物的结合比

王 莹,王希春,金福源,何成华,郑 浩,张海彬   

  1. 1.南京农业大学动物医学院 2.汾湖动物防疫站
  • 出版日期:2012-01-25 发布日期:2012-01-16
  • 基金资助:
    国家“863”计划项目(2007AA10Z429)

Determination of Coupling Ratios of Four Mycotoxins-Carrier Protein Conjugates by Mass Spectrometry

WANG Ying,WANG Xi-chun,JIN Fu-yuan,HE Cheng-hua,ZHENG Hao,ZHANG Hai-bin   

  1. 1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; 2. Fenhu Animal Epidemic Prevention Station, Wujiang 215211, China
  • Online:2012-01-25 Published:2012-01-16

摘要: 采用基质辅助激光解吸-电离飞行时间质谱法(matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOFMS)对由3种真菌毒素伏马菌素B1(FB1)、赭曲霉毒素A(OTA)、脱氧雪腐镰刀菌烯醇(DON)与两种载体蛋白卵清白蛋白(OVA)、血清白蛋白(BSA)分别偶联制备得到的4种小分子-载体蛋白偶联物FB1-OVA、FB1-BSA、OTA-BSA、DON-OVA的偶联结合比进行测定,并与紫外吸收光谱法进行比较。基质辅助激光解吸-电离飞行时间质谱法测得偶联物FB1-OVA、FB1-BSA、OTA-BSA、DON-OVA的结合比分别为5:1、11:1、3:1、0;紫外吸收光谱法测得OTA-BSA的结合比为4.4:1,DON-OVA的结合比为3.4:1,无法测定FB1-OVA、FB1-BSA结合比。

关键词: 基质辅助激光解吸/电离飞行时间质谱法, 紫外吸收光谱法, 真菌毒素, 载体蛋白, 偶联物, 结合比

Abstract: Three mycotoxins including fumonisin B1 (FB1), ochrotoxin A (OTA) and deoxynivalenol (DON) were coupled with two carrier proteins such as ovalbumin (OVA) and bovine serum albumin (BSA), respectively. Four small molecule-carrier protein conjugates (FB1-OVA, FB1-BSA, OTA-BSA and DON-OVA) were prepared. The coupling ratios of the conjugates were determined by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) and ultraviolet (UV) absorption spectroscopy, respectively. The coupling ratios of FB1-OVA, FB1-BSA, OTA-BSA and DON-OVA were 5:1, 11:1, 3:1 and 0, respectively as determined by MALDI-TOFMS. However, the coupling ratios of OTA-BSA and DON-OVA determined by UV absorption spectroscopy were 4.4:1 and 3.4:1, respectively. The coupling ratios of FB1-OVA and FB1-BSA could not be determined by UV absorption spectroscopy.

Key words: matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, ultraviolet absorption spectroscopy, mycotoxin, carrier protein, conjugate, coupling ratio

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