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Competition for Membrane Receptors: Norovirus Detachment via Lectin Attachment

Artikel i vetenskaplig tidskrift
Författare N. Parveen
Gustaf E Rydell
Göran Larson
V. P. Hytonen
V. P. Zhdanov
F. Hook
S. Block
Publicerad i Journal of the American Chemical Society
Volym 141
Nummer/häfte 41
Sidor 16303-16311
ISSN 0002-7863
Publiceringsår 2019
Publicerad vid Institutionen för biomedicin
Institutionen för biomedicin, avdelningen för infektionssjukdomar
Sidor 16303-16311
Språk en
Länkar dx.doi.org/10.1021/jacs.9b0603h
Ämnesord supported lipid-bilayers, small-molecule inhibitor, blood-group, antigens, structural basis, viral entry, binding, virus, protein, ligand, model, Chemistry
Ämneskategorier Kemi, Klinisk medicin

Sammanfattning

Virus internalization into the host cells occurs via multivalent interactions, in which a single virus binds to multiple receptors in parallel. Because of analytical and experimental limitations this complex type of interaction is still poorly understood and quantified. Herein, the multivalent interaction of norovirus-like particles (noroVLPs) with H or B type 1 glycosphingolipids (GSLs), embedded in a supported phospholipid bilayer, is investigated by following the competition between noroVLPs and a lectin (from Ralstonia solanacearum) upon binding to these GSLs. Changes in noroVLP and lectin coverage, caused by competition, were monitored for both GSLs and at different GSL concentrations using quartz crystal microbalance with dissipation monitoring. The study yields information about the minimum GSL concentration needed for (i) noroVLPs to achieve firm attachment to the bilayer prior to competition and to (ii) remain firmly attached to the bilayer during competition. We show that these two concentrations are almost identical for the H type 1-noroVLP interaction but differ for B type 1, indicating an accumulation of B type 1 GSLs in the noroVLP-bilayer interaction area. Furthermore, the GSL concentration required for firm attachment is significantly larger for H type 1 than for B type 1, indicating a higher affinity of noroVLP toward B type 1. This finding is supported by extracting the energy of single noroVLP-H type 1 and noroVLP-B type 1 bonds from the competition kinetics, which were estimated to be 5 and 6 kcal/mol, respectively. This demonstrates the potential of utilizing competitive binding kinetics to analyze multivalent interactions, which has remained difficult to quantify using conventional approaches.

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