title: Molecular cloning and expression of yak (Bos grunniens) lactoferrin cDNA in Pichia pastoris.
abstract: cDNA encoding lactoferrin from yak was isolated by RT-PCR and then sequenced. The cloned cDNA (2127 bp) encodes a 709 amino acid precursor molecule of yak lactoferrin with a signal peptide of 19 amino acids. The yak lactoferrin cDNA was expressed in Pichia pastoris. The recombinant protein, purified by Ni-NTA affinity column, had a molecular weight of 76 kDa and reacted with an antibody raised against native bovine lactoferrin. The iron-binding behavior and antimicrobial activity of the purified protein indicated that it was correctly folded and functional.
authors.affiliation: College of Life Science, Sichuan University, Sichuan Key Laboratory of Molecular Biology and Biotechnology, Chengdu 610064, PR China.
authors.forename: Zhao-Yong
authors.initials: ZY
authors.lastname: Dong
authors.forename: Yi-Zheng
authors.initials: YZ
authors.lastname: Zhang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001709:Biotechnology / Q000379:methods*; D002417:Cattle; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D007781:Lactoferrin / Q000737:chemistry*; D008969:Molecular Sequence Data; D010843:Pichia / Q000378:metabolism; D011994:Recombinant Proteins / Q000737:chemistry; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D011994:Recombinant Proteins; D007501:Iron; D007781:Lactoferrin