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Schülke, Norbert ; Schmid, Franz X.:
The stability of yeast invertase is not significantly influenced by glycosylation.
In: The Journal of Biological Chemistry.
Bd. 263
(1988)
Heft 18
.
- S. 8827-8831.
ISSN 1083-351X
DOI: https://doi.org/10.1016/S0021-9258(18)68381-4
Abstract
Yeast invertase exists in two different forms. The cytoplasmic enzyme is nonglycosylated, whereas the external invertase contains about 50% carbohydrate of the high mannose type. The protein moieties of both enzymes are identical. The two invertases have been used previously as a model system to investigate the influence of covalently linked carbohydrate chains on the stability of large glycoproteins, and controversial results were obtained. Here, we measured thermal and denaturant-induced unfolding by various probes, such as the loss of enzymatic activity, and by the changes in absorbance and fluorescence. The ranges of stability of the two invertases were found to be essentially identical, indicating that the presence of a high amount of carbohydrate does not significantly contribute to the stability of external invertase. Earlier findings that invertase is stabilized by glycosylation could not be confirmed. The stability of this glycoprotein is apparently determined by the specific interactions of the folded polypeptide chain. Unlike the glycosylated form, the carbohydrate-free invertase is prone to aggregation in the denatured state at high temperature and in a partially unfolded form in the presence of intermediate concentrations of guanidinium chloride.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | PubMed-ID: 3288623 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige ProfessorInnen > Professur Biochemie - Univ.-Prof. Dr. Franz Xaver Schmid Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Biochemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige ProfessorInnen |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 30 Apr 2015 13:01 |
| Letzte Änderung: | 16 Jun 2023 07:33 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/11235 |