Glycobiology, Vol 8, 527-532, Copyright © 1998 by Society for Glycobiology
K Sato, G Hanagata, M Kiso, A Hasegawa and Y Suzuki
Sialyl-linkage specificity of sialidases of the human influenza A virus
strains, A/Aichi/2/68 (H3N2) and A/PR/8/34 (H1N1) were studied using
natural and synthetic gangliosides. The sialidase of the A/Aichi/2/68
strain hydrolyzed the terminal Neu5Acalpha2-3Gal sequence but not the
Neu5Acalpha2-3 linkage on the inner Gal of GM1a, which is a ganglioside
that has the gangliotetraose chain (Galbeta1-3GalNAcbeta1-4-
(Neu5Acalpha2-3)Galbeta1++ +-4Glcbeta1-Cer). The sialidase hydrolyzed the
Neu5Ac on the inner Gal of GM2, which had a shorter gangliotriose chain.
GM4, which had the shortest chain (Neu5Acalpha2-3Galbeta1-Cer) of the
gangliosides, had a lower substrate specificity. The N1 and N2 sialidase
subtypes of the human influenza A virus had no significant variation in
their substrate specificity for the gangliosides. Analysis of 11 synthetic
gangliosides, which contained various ceramide or sialic acid moieties,
demonstrated that A/Aichi/2/68 (H3N2) sialidase recognized the ceramide and
sialic acid moiety and the length and structure of the sialyl sugar chain.
ORIGINAL ARTICLES
Specificity of the N1 and N2 sialidase subtypes of human influenza A virus for natural and synthetic gangliosides
Aichi Prefectural Institute of Public Health, Nagoya 462, Japan.
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