TY  - JOUR
AU  - Anđelković, Uros
AU  - Theisgen, Stephan
AU  - Scheidt, Holger A.
AU  - Petković, Marijana
AU  - Huster, Daniel
AU  - Vujčić, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4695
AB  - Understanding the effect of surface charge on the stability of proteins is one prerequisite for tailoring proteins with increased thermal stability. Here, we investigated the origin of the altered thermal stability observed between the four recently isolated isoforms (EINV1-EINV4) of external invertase. External invertase from yeast Saccharomyces cerevisiae, a homodimeric glycoprotein, represents a widely used model for studying the influence of the glyco component on protein stability. The stability of the four isoforms of invertase decreases from EINV1 to EINV4, which is accompanied by an increase in negative surface charge density. Mass spectrometry analysis revealed that the isoforms share identical protein parts indicating that the differences in stability are the result of post-translational modifications. P-31 NMR analysis revealed that the isoforms contain negatively charged phosphate groups in diester and monoester forms attached to the glycan part. The total amount of phosphate bound to the polymannan component varies between the different isoforms. These results, together with the analysis of the amount of polymannan components, show that negative surface charge density does not entirely depend on the amount of phosphate but rather on its distribution. This suggests that charged groups bound to the glyco-component of a protein can influence the stability of glycoproteins. (C) 2011 Elsevier Masson SAS. All rights reserved.
T2  - Biochimie
T1  - The thermal stability of the external invertase isoforms from Saccharomyces cerevisiae correlates with the surface charge density
VL  - 94
IS  - 2
SP  - 510
EP  - 515
DO  - 10.1016/j.biochi.2011.08.020
ER  - 

@article{
author = "Anđelković, Uros and Theisgen, Stephan and Scheidt, Holger A. and Petković, Marijana and Huster, Daniel and Vujčić, Zoran",
year = "2012",
abstract = "Understanding the effect of surface charge on the stability of proteins is one prerequisite for tailoring proteins with increased thermal stability. Here, we investigated the origin of the altered thermal stability observed between the four recently isolated isoforms (EINV1-EINV4) of external invertase. External invertase from yeast Saccharomyces cerevisiae, a homodimeric glycoprotein, represents a widely used model for studying the influence of the glyco component on protein stability. The stability of the four isoforms of invertase decreases from EINV1 to EINV4, which is accompanied by an increase in negative surface charge density. Mass spectrometry analysis revealed that the isoforms share identical protein parts indicating that the differences in stability are the result of post-translational modifications. P-31 NMR analysis revealed that the isoforms contain negatively charged phosphate groups in diester and monoester forms attached to the glycan part. The total amount of phosphate bound to the polymannan component varies between the different isoforms. These results, together with the analysis of the amount of polymannan components, show that negative surface charge density does not entirely depend on the amount of phosphate but rather on its distribution. This suggests that charged groups bound to the glyco-component of a protein can influence the stability of glycoproteins. (C) 2011 Elsevier Masson SAS. All rights reserved.",
journal = "Biochimie",
title = "The thermal stability of the external invertase isoforms from Saccharomyces cerevisiae correlates with the surface charge density",
volume = "94",
number = "2",
pages = "510-515",
doi = "10.1016/j.biochi.2011.08.020"
}

Anđelković, U., Theisgen, S., Scheidt, H. A., Petković, M., Huster, D.,& Vujčić, Z.. (2012). The thermal stability of the external invertase isoforms from Saccharomyces cerevisiae correlates with the surface charge density. in Biochimie, 94(2), 510-515.
https://doi.org/10.1016/j.biochi.2011.08.020

Anđelković U, Theisgen S, Scheidt HA, Petković M, Huster D, Vujčić Z. The thermal stability of the external invertase isoforms from Saccharomyces cerevisiae correlates with the surface charge density. in Biochimie. 2012;94(2):510-515.
doi:10.1016/j.biochi.2011.08.020 .

Anđelković, Uros, Theisgen, Stephan, Scheidt, Holger A., Petković, Marijana, Huster, Daniel, Vujčić, Zoran, "The thermal stability of the external invertase isoforms from Saccharomyces cerevisiae correlates with the surface charge density" in Biochimie, 94, no. 2 (2012):510-515,
https://doi.org/10.1016/j.biochi.2011.08.020 . .