Abstract
Vesicles of charged (Phosphatidic Acid) and neutral (Phosphatidylcholine) lipids were used as membranes model to examine the lateral phase separation induced by a globular protein, namely lysozyme.
The ability of the positively charged protein, adsorbed onto vesicles surfaces, to induce the formation of micro-domains richer in the charged lipid component has been investigated by calorimetric measurements, using a DSC instrument.
The protein adsorption, rate of denaturation and lipid micro-domains formation were affected bypH and salt concentration variations showing the deep influence of the electric charges in modulating this phenomena.Some of the present results have been rationalized on the basis of a theoretical model recently developed by the authors.
Zusammenfassung
Vesikel bestehend aus geladenen (PhosphatidylsÄure) und neutralen (Phosphatidylcholin) Lipiden wurden als Membranmodelle zur Untersuchung der lateralen Phasenseparation verwendet, die durch ein globulÄres Protein, nÄmlich Lysozym, induziert wird. Die FÄhigkeit des positiv geladenen Proteins, das auf der VesikeloberflÄche adsorbiert ist, MikrodomÄnen unter Anreicherung der geladenen Lipidkomponente zu induzieren, wurde mittels kalorimetrischer Messungen (DSC) untersucht.
Die Proteinadsorption, die Denaturierungsrate und die Bildung von MikrodomÄnen werden durch Variation despH und der Salzkonzentration beeinflusst. Dies zeigt den starken Einfluss elektrischer Ladungen auf solche PhÄnomene. Einige der Resultate werden mit einem theoretischen, von den Autoren kürzlich entwickelten Modell interpretiert.
Similar content being viewed by others
References
S. McLaughlin and J. J. Brown, Gen. Physiol., (1981) 475.
A. Raudino, Liq. Cryst., 3 (1988) 1055.
D. Hoekstra, Biochemistry, 21 (1982) 1055 and 2833.
I. Graham, J. Gagne' and J. R. Silvius, Biochemistry, 34 (1985) 7123.
R. Leventis, J. Gagne', N. Fuller, R. P. Rand and J. R. Silvius, Biochemistry, 25 (1986) 6978.
R. K. Scheule, Biochim. Biophys. Acta, 889 (1987) 185.
For recent reviews on this matter see e. g. A. Watts and J. J. H. H. M. De Pont, “Progress in Protein-lipid interactions”, Elsevier, Amsterdam Vol.1, 1985 and Vol.2, 1986, D. Marsh, J. Bioenerg. Biomembr., 19 (1987) 677.
A. J. Verkleij, Biochim. Biophys. Acta, 779 (1984) 43, and references cited therein.
D. Bach, K. Rosenbeck and I. R. Miller, Eur. J. Biochem., 53 (1975) 265.
A. G. Walton and F. C. Maenpa, J. Colloid Interface Sci., 72 (1979) 265.
M. E. Soderquist and A. G. Walton, J. Colloid Interface Sci., 75 (1980) 386.
M. Pezolet, L. Duchesneau, P. Bougis, J. F. Faucon and J. Dufourcq, Biochim. Biophys. Acta, 704 (1982) 515.
W. K. Surewicz, M. A. Moscarello and H. H. Mantsh, Biochemistry, 26 (1987) 3881.
M. D. Bazzi, R. W. Woody and A. Brack, Biopolymers, 26 (1987) 1115.
J. M. Boggs, in Membrane Fluidity, R. C. Aloia Ed., Academic Press, New York 1983, Vol. 2, p. 89. and references cited therein
B. Maggio, J. M. Sturtevant and R. K. Yu, J. Biol. Chem., 282 (1987) 2652.
H. J. Galla and E. Sackmann, Biochim. Biophys. Acta, 401 (1975) 509.
W. Hartmann, H. J. Galla and E. Sackmann, FEBS Letters, 78 (1977) 169.
R. Maksymiv, S. F. Sui, H. Gaub and E. Sackmann, Biochemistry, 26 (1987) 2983.
A. Raudino, F. Castelli and S. Gurrieri, J. Phys. Chem., 94 (1990) 1526.
G. R. Bartlett, J. Biol. Chem., 234 (1959) 466.
P. L. Privalov and N. N. Khechinashvili, J. Mol. Biol., 86 (1974) 665.
F. Delben and V. Crescenzi, Biochim. Biophys. Acta, 194 (1986) 615.
H. Eibl, in Membrane Fluidity, R. C. Aloja Ed., Academic Press, New York 1983. Vol. 2, p. 217.
G. Cevc, Biochemistry, 26 (1987) 6305.
H. Eibl and A. Blume, Biochim. Biophys. Acta, 553 (1979) 476.
A. Blume and H. Eibl, Biochim. Biophys. Acta, 558 (1979) 13.
J. M. Boggs, G. Rangaraj and K. M. Koshy, Biochim. Biophys. Acta, 937 (1988) 1.
R. N. McElhaney, Biochim. Biophys. Acta, 864 (1986) 361.
Author information
Authors and Affiliations
Additional information
We thank the Italian M. U. R. S. T. for financial support. We would also like to thank Professor N. A. Mancini (C. U. M. E. C.) for his kind permission to use the Mettler TA 3000 system.
Rights and permissions
About this article
Cite this article
Raudino, A., Castelli, F. Interaction of globular proteins with mixed lipid vesicles. Journal of Thermal Analysis 37, 1877–1886 (1991). https://doi.org/10.1007/BF01912218
Issue Date:
DOI: https://doi.org/10.1007/BF01912218