Revisiting the role of histo-blood group antigens in rotavirus host-cell invasion
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Histo-blood group antigens (HBGAs) have been proposed as rotavirus receptors. H type-1 and Lewisb antigens have been reported to bind VP8* from major human rotavirus genotypes P, P and P, while VP8* from a rarer P rotavirus recognizes A-type HBGAs. However, the role and significance of HBGA receptors in rotavirus pathogenesis remains uncertain. Here we report that P rotavirus HAL1166 and the related P human rotavirus K8 bind to A-type HBGAs, although neither virus engages the HBGA-specific a1,2-linked fucose moiety. Notably, human rotaviruses DS-1 (P) and RV-3 (P) also use A-type HBGAs for infection, with fucose involvement. However, human P rotavirus Wa does not recognize A-type HBGAs. Furthermore, the common human rotaviruses that we have investigated do not use Lewisb and H type-1 antigens. Our results indicate that A-type HBGAs are receptors for human rotaviruses, although rotavirus strains vary in their ability to recognize these antigens.
Receptors and Membrane Biology