title: [Expression of xylanase gene xynA from Streptomyces olivaceoviridis A1 in Escherichia coli and Pichia pastoris].
abstract: The gene xynA encoding xylanase was cloned from Streptomyces olivaceoviridis A1. The xynA with and without origin signal peptide sequence were fused behind pel B signal peptide in the plasmid pET-22b(+) respectively, then transfered into the host E. coli. The xylanase expressed in E. coli had normal bioactivity. Further, the xynA without origin signal peptide sequence was cloned into the plasmid pPIC9 under the control of AOX1 promoter and introduced into the host Pichia pastoris by electroporation. The results of SDS-PAGE and activity assay of the xylanase expressed by recombinant P. pastoris showed that the xynA had been overexpressed and secreted, and the xylanase expressed had normal bioactivity. The expression level of xylanase in recombinant P. pastoris exceeded 0.2mg/mL in shake culture.
authors.affiliation: Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
authors.forename: Hong-Lian
authors.initials: HL
authors.lastname: Zhang
authors.forename: Bin
authors.initials: B
authors.lastname: Yao
authors.forename: Ya-Ru
authors.initials: YR
authors.lastname: Wang
authors.forename: Tie-Zheng
authors.initials: TZ
authors.lastname: Yuan
authors.forename: Wang-Zhao
authors.initials: WZ
authors.lastname: Zhang
authors.forename: Ning-Feng
authors.initials: NF
authors.lastname: Wu
authors.forename: Yun-Liu
authors.initials: YL
authors.lastname: Fan
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D018274:Electroporation; D043364:Endo-1,4-beta Xylanases / Q000235:genetics / Q000378:metabolism*; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D008957:Models, Genetic; D010843:Pichia / Q000235:genetics / Q000378:metabolism*; D011401:Promoter Regions, Genetic / Q000235:genetics; D013302:Streptomyces / Q000201:enzymology* / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D043364:Endo-1,4-beta Xylanases