Chemical structure of monosialoganglioside GM1b biosynthesized in vitro.

Biochimica Et Biophysica Acta
A StoffynM C Yip

Abstract

The structure of a neuraminidase-labile monosialoganglioside which is formed in vivo from asialoganglioside (galactosyl (beta, 1 in equilibrium 3) N-acetylgalactosaminyl (beta, 1 in equilibrium 4) galactosyl (beta, 1 in equilibrium 4) glucosyl (1 in equilibrium 1) ceramide) and cytidine-5'-monophospho-N-acetylneuraminic acid in the presence of young rat brain sialytransferase has been established. This monosialoganglioside contains a neuraminidase-labile N-acetylneuraminyl group which is linked at position C-3 of the terminal galactosyl unit. This result was obtained by ultramicro scale permethylation of radioactive neuraminidase-labile monosialoganglioside biosynthesized from asialoganglioside labeled with tritium in the terminal galactose.

Citations

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