Reversible inactivation of vibrio cholerae neuraminidase by gangliosides

B. Cestaro, G. Cervato, G. Tettamanti

Research output: Contribution to journalArticlepeer-review

Abstract

Vibrio Cholerae neuraminidase binds gangliosides, like monosialoganglioside GM1 (which is resistant to the enzyme action), and disialoganglioside GD1a (which is hydrolyzed by the enzyme), forming lipo-protein complexes. This process is time and temperature dependent and follows saturation kinetics. The neuraminidase-ganglioside complex can also be prepared by ammonium sulfate precipitation. The formation of the complex is followed by enzyme inactivation. However, upon addition of adequate amounts of albumin, the enzyme activity is largely recovered. It is thus evident that Vibrio Cholerae neuraminidase, when binding gangliosides, forms two different complexes: the enzyme-substrate complex, which is the specific one, and another one, probably unspecific, in which the enzyme carries no more activity.

Original languageEnglish
Pages (from-to)159-169
Number of pages11
JournalBulletin of Molecular Biology and Medicine
Volume3
Issue number3
Publication statusPublished - 1978

ASJC Scopus subject areas

  • Clinical Biochemistry

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