遗传 ›› 2006, Vol. 28 ›› Issue (9): 1112-1116.

• 技术与方法 • 上一篇    下一篇

CELⅠ酶的粗提取及其活性检测

韩锁义; 杨玛丽; 盖钧镒; 喻德跃   

  1. 南京农业大学大豆研究所/国家大豆改良中心/作物遗传与种质创新国家重点实验室, 南京 210095

  • 收稿日期:2005-09-26 修回日期:2006-01-06 出版日期:2006-09-01 发布日期:2006-09-01
  • 通讯作者: 韩锁义

Crude Extraction and Activity Assay of CEL I

HAN Suo-Yi; YANG Ma-Li; GAI Jun-Yi; YU De-Yue

  

  1. Soybean Research Institute, Nanjing Agricultural University; National Center for Soybean Improvement, Ministry of Agriculture; National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing 210095, China

  • Received:2005-09-26 Revised:2006-01-06 Online:2006-09-01 Published:2006-09-01
  • Contact: HAN Suo-Yi

摘要: CEL I酶是第一个从真核生物中提取的用于高效特异切割DNA双链碱基错配和DNA扭曲的内切酶, 因而也是TILLING技术中用到的一种关键酶。文章对CELI酶的粗提取及其活性检测进行了研究。错配切割实验表明, CELI酶在包含有G→A点突变的杂合双链中, 能有效地在错配位点进行切割, 并可以通过ABI377测序仪获得直观的检测结果, 从而可以用于TILLING分析。

关键词: 点突变, 活性, TILLING, CELⅠ酶

Abstract:

CEL I, extracted from celery, is the first known eukaryotic nuclease that cleaves DNA with high specificity at sites of base-substitution mismatch and DNA distortion. It is a key enzyme for TILLING research. Here we reported a crude extraction method and activity assay of CEL I. Incision at mismatches of single nucleotide suggested that CEL I can effectively detect DNA at G→A base substitution and the result can be obtained from an ABI377 Sequencer. Therefore, the extracted enzyme can be used in TILLING.

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