作者: Susanne Boysen , Berit Fogh-Schultz , Inger Andersen , Peter Højrup , Jens Jørgen Lønsmann Iversen
DOI: 10.1016/J.PEP.2004.01.011
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摘要: Abstract Human serum amyloid P component (SAP) was expressed in the methylotrophic yeast Pichia pastoris . SAP cDNA placed under control of regulatory sequences derived from alcohol oxidase gene (AOX1), and its protein product secreted using Saccharomyces cerevisiae α-mating factor signal sequence. Recombinant (r-SAP) produced a bioreactor with computer controlled fed-batch mode purified by use C-terminal histidine tag. The yield r-SAP 3–4 mg 1 L supernatant 5–6 mg cell paste, indicating that majority not secreted. Treatment paste EDTA increased further about 30%. N-terminal showed non-complete cleavage Purified r-SAP, analyzed native conditions, shown to be decamer, like human (h-SAP), monomers 27 kDa. Each monomer had one N-glycosylation site, positioned at same site as for h-SAP. bound antibodies against Furthermore, ds DNA influenza A virus subunits Ca 2+ -dependent manner inhibited hemagglutination. These results indicate P. has biological activity