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Preparation of GM1 Ganglioside With Sialidase-Producing Marine Bacteria as a Microbial Biocatalyst

Preparation of GM1 Ganglioside With Sialidase-Producing Marine Bacteria as a Microbial Biocatalyst

Y Fukano, M Ito

Appl Environ Microbiol. 1997 May;63(5):1861-5.

PMID: 9143118

Abstract:

This paper describes the preparation of monosialoganglioside GM1 with sialidase-producing marine bacteria as a microbial biocatalyst. A new sialidase-producing bacterium, identified tentatively as Pseudomonas sp. strain YF-2, was isolated from seawater by enrichment culture with ganglioside as the sole source of carbon. When YF-2 was cultured in a synthetic medium containing crude bovine brain gangliosides at 25 degrees C for 3 days, 80 to 90% of the gangliosides were converted to GM1. GM1 was then purified from the supernatant of YF-2 culture by C18 reverse-phased chromatography, followed by DEAE-Sephadex A25 anion-exchange chromatography. In a typical experiment, 178 mg of highly purified GM1 was obtained from 500 mg of the crude ganglioside fraction. The GM1 induced neurite outgrowth of neuroblastoma Neuro2a cells at a concentration of 33 to 100 microM in the presence of fetal calf serum. Sialidase was purified 33-fold with 13.3% recovery from the culture supernatant of YF-2. The purified enzyme hydrolyzed polysialogangliosides to produce GM1 but did not act on GM1. It was therefore concluded that polysialogangliosides in the culture of strain YF-2 were converted to GM1 by this sialidase.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP37758477	Monosialoganglioside GM1 from bovine brain		37758-47-7	Price

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