Biochemical identification of glycosylation inhibiting factor.
نویسندگان
چکیده
منابع مشابه
Immunosuppressive activities of recombinant glycosylation-inhibiting factor mutants.
We have shown previously that glycosylation-inhibiting factor (GIF) in culture supernatants of suppressor T cell (Ts) hybridomas had bioactivity, while the same cells contained a substantial quantity of inactive GIF in cytosol. Mass-spectrometric analysis of GIF in the culture supernatant and cytosol of a Ts hybridoma provided direct evidence that GIF protein was posttranslationally modified in...
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متن کاملConversion of inactive glycosylation inhibiting factor to bioactive derivatives by modification of a SH group.
Escherichia coli-derived recombinant human glycosylation inhibiting factor (rhGIF) contains three cysteine residues (Cys-57, -60, and -81). All SH groups in the cysteine residues are free, and the GIF molecule had no biologic activity. Carboxymethylation of the SH group of Cys-60 in the molecule resulted in the generation of bioactivity, although the activity of the carboxymethylated GIF was 10...
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Background: Human coagulation factor IX (hFIX) is a glycoprotein with two N-glycosylation sites at the activation peptide. Since the activation peptide is removed in mature hFIX, the exact role of N-glycosylation is unclear. To investigate the role of N-glycosylation in the secretion and activity of hFIX, we inhibited N-glycosylation by tunicamycin in the stable Human Embryonic Kidney (HEK)- c...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1990
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.87.5.1903