Glial cell line-derived neurotrophic factor: Characterization of mammalian posttranslational modifications
| Autor: | Elisa Piccinini, Nisse Kalkkinen, Mart Saarma, Pia Runeberg-Roos |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Glial Cell Line-Derived Neurotrophic Factor Receptors
Glycosylation animal diseases Cell CHO Cells 03 medical and health sciences 0302 clinical medicine Polysaccharides Neurotrophic factors Cricetinae Escherichia coli Glial cell line-derived neurotrophic factor medicine Animals Humans Secretion Glial Cell Line-Derived Neurotrophic Factor Protein Precursors Cells Cultured 030304 developmental biology 0303 health sciences biology Protein Stability urogenital system Chinese hamster ovary cell HEK 293 cells General Medicine Culture Media 3. Good health Cell biology Blot HEK293 Cells medicine.anatomical_structure nervous system biology.protein Protein Processing Post-Translational GDNF family of ligands 030217 neurology & neurosurgery |
| Zdroj: | Annals of Medicine. 45:66-73 |
| ISSN: | 1365-2060 0785-3890 |
| DOI: | 10.3109/07853890.2012.663927 |
| Popis: | Although glial cell line-derived neurotrophic factor (GDNF) has a strong clinical potential, little is known of how the posttranslational modifications of GDNF affect its biological activity and therapeutic potential. In mammalian cells GDNF is synthesized as a preproprotein. During secretion GDNF dimerizes, folds with -S-S- bonds, is modified by N-linked glycosylation, and undergoes proteolytic processing. After production in E. coli, unglycosylated GDNF is renaturated in vitro. Nevertheless, GDNF from E. coli was used in Parkinson's disease-related clinical trials.Constructs encoding variants of human GDNF were generated and expressed in mammalian cells. The proteins were analysed by SDS-PAGE, Western blotting, RET-phosphorylation assays, and N-terminal sequencing. The stability of mammalian GDNF was compared to commercial GDNF produced in E. coli.Posttranslational processing of mammalian GDNF depends on the expression conditions. Two forms of GDNF with different N-termini are formed. GDNF without a prosequence is secreted and biologically active. GDNF is modified by N-linked glycosylation at one (Asn(49)) out of two consensus sites. N-linked glycosylation aids proteolytic processing of GDNF. Both glycosylated and unglycosylated GDNF from mammalian cells are more stable than GDNF from E. coli.Posttranslational modifications of GDNF influence its stability, which may be critical for its clinical use. |
| Databáze: | OpenAIRE |
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