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The stability of yeast invertase is not significantly influenced by glycosylation

Title data

Schülke, Norbert ; Schmid, Franz X.:
The stability of yeast invertase is not significantly influenced by glycosylation.
In: The Journal of Biological Chemistry. Vol. 263 (25 June 1988) Issue 18 . - pp. 8827-8831.
ISSN 1083-351X

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Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed-ID: 3288623
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Professorship Biochemistry - Univ.-Prof. Dr. Franz Xaver Schmid
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Biochemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 30 Apr 2015 13:01
Last Modified: 29 Apr 2016 13:25
URI: https://eref.uni-bayreuth.de/id/eprint/11235