|本期目录/Table of Contents|

[1]赵联正,谢占玲,赵朋.一种新的镰刀菌Q7-31木聚糖酶Xyn9的分离纯化鉴定及酶学特性[J].江苏农业科学,2015,43(05):42-45.
 Zhao Liamzheng,et al.Purification,identification and enzymatic characteristics of a new xylanase Xyn9 from Fusarium sp. Q7-31[J].Jiangsu Agricultural Sciences,2015,43(05):42-45.
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一种新的镰刀菌Q7-31木聚糖酶Xyn9的分离纯化鉴定及酶学特性(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第43卷
期数:
2015年05期
页码:
42-45
栏目:
生物技术
出版日期:
2015-05-25

文章信息/Info

Title:
Purification,identification and enzymatic characteristics of a new xylanase Xyn9 from Fusarium sp. Q7-31
作者:
赵联正1 谢占玲12 赵朋1
1.青海大学生态环境工程学院,青海西宁 810016;2.青海省高原作物种质资源创新与利用重点实验室,青海西宁 810016
Author(s):
Zhao Liamzhenget al
关键词:
镰刀菌木聚糖酶分离纯化串联质谱鉴定酶学特性
Keywords:
-
分类号:
Q55;Q814.1
DOI:
-
文献标志码:
A
摘要:
为对植物病原菌镰刀菌(Fusarium sp.)Q7-31所产木聚糖酶进行鉴定及酶学特性分析,在发酵产酶培养基上对Q7-31进行发酵培养,获得能够高效降解植物细胞壁的粗酶液。然后,采用Sephacry S-100凝胶柱层析和 DEAE 弱阴离子交换柱层析对粗酶液进行分离纯化后得到木聚糖酶Xyn9,并对其开展蛋白质组学研究和酶学特性分析。结果表明:粗酶液中木聚糖酶比活为16.58 U/mg,纤维素酶比活为0.428 U/mg,细胞壁降解酶比活为0.019 8 U/mg,蛋白含量为2.17 mg/mL。Xyn9的蛋白质组学研究结果显示,其分子量为21 ku、等电点为6.86,接近GH10家族。纯化后Xyn9的酶学特性表明,最适反应温度为47 ℃,最适pH值为5.6,该酶在33 ℃以下和在pH值5~6的范围内较稳定;金属离子K+对该酶有激活作用,Na+、Ca2+、Mg2+、Zn2+抑制该酶活性,Cu2+、Hg+使该酶完全失活。综合Xyn9的分子量、蛋白质组学结果以及酶学特性,最终将其鉴定为一种新的介于GH10家族与GH11家族之间的内切木聚糖酶。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2014-11-09
基金项目:国家自然科学基金(编号:31260021);青海省科技项目(编号:2014-Z-903);青海省科技厅重点基础研究(编号:2011-Z-14);国家重点实验室培育基地青海省高原作物种质资源创新与利用重点实验室开放课题(编号:2011-05);青海大学高层次人才项目(编号:2012-QGC-4)。
作者简介:赵联正,男,研究方向为植物细胞壁降解酶。E-mail:zhaolianzheng114@163.com。
通信作者:谢占玲,博士,
更新日期/Last Update: 2015-05-25