title: High level expression of the synthetic human lysozyme gene in Aspergillus oryzae.
abstract: Aspergillus oryzae was transformed with a synthetic gene consisting of a chicken lysozyme signal sequence and a mature human lysozyme (HLY) sequence. The transformants secreted active HLY (about 1.2 mg/l) when the HLY gene was expressed under the control of the Taka-amylase A gene (amyB) promoter. Western blot analysis suggested that the secreted protein was immunoreactive with anti-human lysozyme antibody and the signal peptide was correctly cleavaged off in the A. oryzae transformants. The transcriptional level of the HLY gene was investigated by Northern blot analysis using a probe that was equivalently specific to both the HLY gene and the amyB gene. The HLY gene was expressed at a higher level compared with the amyB gene because of its multi-copy integration. The efficient transcription of the HLY gene suggested that A. oryzae is a promising host for production of heterologous proteins from higher eukaryotes.
mesh_terms: D000681:Amylases / Q000235:genetics; D001236:Aspergillus oryzae / Q000235:genetics / Q000378:metabolism*; D001483:Base Sequence; D003001:Cloning, Molecular; D005656:Fungal Proteins / Q000235:genetics; D015966:Gene Expression Regulation, Fungal; D005796:Genes; D005813:Genes, Synthetic; D005822:Genetic Vectors; D006801:Humans; D008969:Molecular Sequence Data; D009113:Muramidase / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D010957:Plasmids; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D005656:Fungal Proteins; D011993:Recombinant Fusion Proteins; D000681:Amylases; D009113:Muramidase