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点突变对枯草芽孢杆菌甘露聚糖酶结构和功能的影响 被引量:2

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摘要 目的研究定点突变对枯草芽孢杆菌B23所产生的甘露聚糖酶活性及蛋白结构的影响,深入了解该酶结构与功能间的关系,为其分子改造提供理论依据。方法通过与同源酶蛋白序列的比较和分析,在同源性较高的色氨酸第196、198和199位点上,天冬氨酸第91位点上和谷氨酸第191位点上通过特异引物引入突变,PCR扩增获得甘露聚糖酶的突变基因,B.subtilis WB800为表达载体,纯化相应的诱变蛋白,测定其酶活性及荧光光谱变化。结果三个色氨酸突变体蛋白[Man(W196H)、Man(W198H)、Man(W199H)和Man(W199A)]核的活性均有所下降,其中Man(W199H)突变体酶活力几乎丧失,为突变前的4%。Man(D91N)和Man(E191Q)的酶活力也分别降至突变前的10%和12%。结论W199、D91和E191是酶活性的必需基团,对其造成的突变对甘露聚糖酶的结构和活性有显著影响。
出处 《高等函授学报(自然科学版)》 2008年第1期9-12,共4页 Journal of Higher Correspondence Education(Natural Sciences)
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  • 1Lu X J, Chen X M, Fu D X, et al. Effect of amorphophallus konjac oligosaccharides on STZ-induced diabetes model of isolated islets.Life Sci,27,2002,72(6) :711 ~ 719.
  • 2Fukumori F, Takeda H, Fujisawa T, et al. Blood glucose and insulin concentrations are reduced in humans administered sucrose with inosine or adenosine. Journal of Nutrition, 2000,130:1946 ~ 1949.
  • 3LUX J,CHEN X M,FU D X,et al. Effect of Amorphophallus Konjac Oligosaccharides on STZ- Induced Diabetes Model of Isolated Islets[J]. Life Sci, 2002,72(6): 711-719.
  • 4YASUNORI FUKUMORI,HIROYUKI TAKEDA,TAKUJI FUJISAWA,et al. Blood Glucose and Insulin Concentrations are Reduced in Humans Administered Sucrose with Inosine or Adenosine [J]. Journal of Nutrition. 2000, 130: 1946-1949.
  • 5BUCHANAN R.E.,GIBOOS N.E. Bergery's Manual of Determinative Bacteriology[M]. 8th ed. Wilakins Co Baltimore, 1974.
  • 6Kowalczyk D W,Ertl H C J.Immune responses to DNA vaccines.Cell and Molecular Life Sciences,1999,55(5):751 ~ 770.
  • 7Sahota S S,Townsend M,Stevenson F K.Identification and assembly of V genes as idiotype-specific DNA fusion vaccines in multiple myeloma.Methods Mol Med,2005,113:105 ~119.
  • 8Rosati M,Von Gegerfelt A,Roth P,et al.DNA vaccines expressing different forms of simian immunodeficiency virus antigens decrease viremia upon SIVmac251 challenge.J Virol,2005,79 (13):8480 ~8492.
  • 9O' Kennedy R D,Baldwin C,Keshavarz-Moore E.Effects of growth medium selection on plasmid DNA production and initial processing steps.Journal of Biotechnology,2000,76 (8):175~183.
  • 10J.萨姆布鲁克,D.W 拉塞尔.分子克隆实验指南.第3版.科学出版社,2001.1595.

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  • 1刘正初.用科学发展观看我国草本纤维产业前景[J].中国麻业科学,2007,29(B02):68-71. 被引量:11
  • 2ARISAN-ATAC L,HODITS R,KRISTUFEK D,et al. Purification and characterization of a β-mannanase of Trichoderma reesei C-30[J]. Appl Microbial Biotechnol, 1993,39:58 - 62.
  • 3AKINO T,NAKAMURA N,HORIKOSHI K. Production of β-mannosidase and β-mannanase by an alkalophilic Bacillus sp. [J]. Appl Microbio Biotechnol, 1987,26(4) :323 - 327.
  • 4NATHALIE ETHIER, GUYLAINE TALBOI, JURGEN SYGUSCH. Gene cloning, DNA sequencing and expression of thermostable β-mannanase from Bacillus stearothermophilus [ J ]. Applied and Envinmmetal Microbiology, 1998,64( 11 ) :4428 - 4432.
  • 5RICHARD BOURGAULT,J. DEREK BEWLEY. Variation in its C-terminal amino acids determines whether endo-β-mannanase is active or inactive in ripening tomato fruits of different cultivars[J]. Plant Physiology,2002,130: 1254 - 1262.
  • 6ZHANG Y X,LIU Z C,CHEN X B. Cloning and expression of a mannanase gene from Erwinia carotovora CXJZ95-198 [ J ]. Annals of Microbiology, 2007,57(4) :623 -628.
  • 7Nucleic Acids Research Advance Access originally published online on May 7, 2008 Nucleic Acids Research 2008 36(Web Server issue) :W197 - W20 t [ EB/OL ]. nar. oxfordjournals, org/cgi/content/abstract/gkn238.
  • 8ARISAN--ATAC I,HODITS R,KRISTUFEK D,et al.Purification and characterization of a β-mannanase of Trichoderma reesei C-30 [J ].Appl Microbial Biotechnol, 1993,39 : 58-62.
  • 9AKINO T,NAKAMURA N,ORIKOSHI K.Production of β- mannosidase and β-mannanase by an alkalophilic Bacillus.sp [J].Appl Microbio Biotechnol, 1987,26(4) :323-327.
  • 10ETHIER N,TALBOI G,SYGUSCH J. Gene cloning,DNA sequencing and expression of thermostable β-mannanase from Bacillus stearothermophilus [J].Applied and Envinmmetal Microbiology, 1998,64 ( 11 ) : 4428-4432.

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