生物技术通报 ›› 2017, Vol. 33 ›› Issue (11): 153-159.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0413

• 研究报告 • 上一篇    下一篇

一株产几丁质脱乙酰酶海洋细菌的筛选、鉴定及发酵优化

来蒋丽1, 刘姝1,2, 胡晟源1, 顾张慧1, 王淑军2, 房耀维1,2   

  1. 1. 淮海工学院海洋生命与水产学院,连云港 222005;
    2. 江苏省海洋资源开发研究院,连云港 222005
  • 收稿日期:2017-05-21 出版日期:2017-11-26 发布日期:2017-11-22
  • 作者简介:来蒋丽,女,硕士研究生,研究方向:海洋微生物生物技术;E-mail:laijiangli199310@163.com
  • 基金资助:
    江苏省自然科学基金面上项目(BK20151282),江苏省高校“青蓝工程”,江苏省“六大人才高峰”第十二批高层次人才项目(swyy-195),中国博士后科学基金(160034),青岛博士后基金,第48批“留学归国人员”科研启动基金,淮海工学院科研创新基金(Z2014016)

Screening and Identification of a Marine Bacterium Producing Chitin Deacetylase and Optimization of Its Fermentation Condition

LAI Jiang-li1, LIU Shu1,2, HU Sheng-yuan1, GU Zhang-hui1, WANG Shu-jun2, FANG Yao-wei1,2   

  1. 1. College of Fisheries and Marine Life,Huaihai Institute of Technology,Lianyungang 222005;
    2. Jiangsu Marine Resources Development Research Institute,Lianyungang 222005
  • Received:2017-05-21 Published:2017-11-26 Online:2017-11-22

摘要: 利用对硝基-N-乙酰苯胺筛选培养基从海州湾海域海泥中筛选获得产几丁质脱乙酰酶细菌MCDA02。经过形态学、生理生化和16S rDNA序列分析初步鉴定该菌株为解角质素微杆菌。通过单因素优化和正交试验优化,得出最优发酵条件。在单因素优化基础上,利用正交试验优化获得菌株MCDA02最优发酵条件为发酵温度25℃,培养基起始pH7.0,装液量50 mL/250 mL,几丁质3%,发酵时间48 h。在此发酵条件下,菌株MCDA02发酵水平达到158.47 U/mL,是优化前的3.2倍。试验结果为菌株MCDA02几丁质脱乙酰酶的进一步研究奠定基础。

关键词: 几丁质脱乙酰酶, 海洋细菌, 鉴定, 产酶条件

Abstract: A strain MCDA02 producing chitin deacetylase was screened with the media added nitro-N-acetyl aniline from the marine mud of Haizhou bay. Then,it was identified as Microbacterium keratanolyticum through morphological,biochemical characteristics,and 16S rDNA sequence analysis. With single-factor strategy and orthogonal experiments,the fermentation condition was optimized as followings:fermentation period of 48 h,initial pH of 7.0,culture temperature of 30℃,50 mL of liquid medium in a 250 mL flask,and 3% chitin. Under the optimized conditions,the highest chitin deacetylase activity of strain MCDA02 reached 158.47 U/mL,which was about 3.2 times of that before optimization. The results laid a foundation for further study of the chitin deacetylase from the strain MCDA02.

Key words: chitin deacetylase, marine bacteria, identification, fermentation condition