Cell Recognition by Foot-and-Mouth Disease Virus That Lacks the RGD Integrin-Binding Motif: Flexibility in Aphthovirus Receptor Usage
0301 basic medicine
570
[SDV]Life Sciences [q-bio]
Molecular Sequence Data
CHO Cells
Virus Replication
630
Cell Line
03 medical and health sciences
Aphthovirus
Capsid
Cricetinae
Animals
Humans
Receptors, Vitronectin
Amino Acid Sequence
Recombination, Genetic
0303 health sciences
Binding Sites
3. Good health
[SDV] Life Sciences [q-bio]
Receptors, Virus
Capsid Proteins
Heparitin Sulfate
K562 Cells
Oligopeptides
DOI:
10.1128/jvi.74.4.1641-1647.2000
Publication Date:
2002-07-27T09:55:53Z
AUTHORS (6)
ABSTRACT
ABSTRACT
Cell surface molecules that can act as virus receptors may exert an important selective pressure on RNA viral quasispecies. Large population passages of foot-and-mouth disease virus (FMDV) in cell culture select for mutant viruses that render dispensable a highly conserved Arg-Gly-Asp (RGD) motif responsible for integrin receptor recognition. Here, we provide evidence that viability of recombinant FMDVs including a Asp-143→Gly change at the RGD motif was conditioned by a number of capsid substitutions selected upon FMDV evolution in cell culture. Multiply passaged FMDVs acquired the ability to infect human K-562 cells, which do not express integrin α
v
β
3
. In contrast to previously described cell culture-adapted FMDVs, the RGD-independent infection did not require binding to the surface glycosaminoglycan heparan sulfate (HS). Viruses which do not bind HS and lack the RGD integrin-binding motif replicate efficiently in BHK-21 cells. Interestingly, FMDV mutants selected from the quasispecies for the inability to bind heparin regained sensitivity to inhibition by a synthetic peptide that represents the G-H loop of VP1. Thus, a single amino acid replacement leading to loss of HS recognition can shift preferential receptor usage of FMDV from HS to integrin. These results indicate at least three different mechanisms for cell recognition by FMDV and suggest a potential for this virus to use multiple, alternative receptors for entry even into the same cell type.
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CITATIONS (139)
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