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  • Human granulocyte colony stimulating factor (G-CSF) produced in the filamentous fungus Aspergillus niger
    Kraševec, Nada ...
    For the first time, a fungal production system is described for expression and secretion of the medically important hu- man protein G-CSF, in Aspergillus niger . A reliable strategy was chosen with ... in-frame fusion of G-CSF behind a KEX2 cleavage site downstream of the coding region of the highly secreted homologous glucoamylase. This provided secre- tion levels of 5-10 mg/l culture medium of correctly processed G-CSF, although the majority of the protein (>90%) was biologically inactive. Following denaturation/ concentration and chromatographic separation/ renaturation, the G-CSF proliferation activity increased considerably, and analytical immobilised metal affinity chromatography confirmed the monomeric and correctly folded protein. These data suggest that this human secretory protein secreted into the medium of A. niger was not correctly folded, and that it escaped the endoplasmic reticulum folding control systems. This is com- pared to the folding of G-CSF produced in bacteria and yeast.
    Vir: Acta chimica slovenica. - ISSN 1318-0207 (Vol. 61, no. 4, 2014, str. 709-717)
    Vrsta gradiva - članek, sestavni del
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 31661017

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

vir: Acta chimica slovenica. - ISSN 1318-0207 (Vol. 61, no. 4, 2014, str. 709-717)

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