Biochemical evidence of recombination within the unsegmented RNA genome of aphthovirus [PDF]
Four different pairs of temperature-sensitive mutants, derived from the same strain of aphthovirus, were crossed by using an infectious center recombination test. Each parental mutant carried an unselected marker affecting the isoelectric point of a virus-coded polypeptide; progeny of the crosses, able to grow at the nonpermissive temperature, were ...
Andrew M. Q. King +3 more
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Evolution of a persistent aphthovirus in cytolytic infections: partial reversion of phenotypic traits accompanied by genetic diversification [PDF]
Foot-and-mouth disease virus (FMDV) shows a dual potential to be cytolytic or to establish persistent infections in cell culture. FMDV R100, a virus rescued after 100 passages of carrier BHK-21 cells persistently infected with FMDV clone C-S8c1, showed multiple genetic and phenotypic alterations relative to the parental clone C-S8c1.
Noemı́ Sevilla, Esteban Domingo
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Foot-and-mouth disease virus 3C protease as virulence determinant plays multiple roles in cleaving viral polyprotein and host factors [PDF]
Foot-and-mouth disease virus (FMDV) can cause a severe infectious disease that primarily affects even-toed ungulates. FMDV is classified into the genus of Aphthovirus in the family Picornaviridae.
Houcheng Zhou +6 more
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Identification of an essential region for internal initiation of translation in the aphthovirus internal ribosome entry site and implications for viral evolution [PDF]
Translation of aphthovirus RNA is initiated at an internal ribosome entry site (IRES) element, preceding the first functional AUG initiation codon. The effect of mutations at the base of domain 3 of the aphthovirus IRES on translation activity has been analyzed by site-directed mutagenesis and expression of bicistronic RNAs in transfected cells.
Encarnación Martı́nez-Salas +2 more
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Internal initiation of translation is promoted by internal ribosome entry site (IRES) cis-acting elements. Using transcripts that correspond to the structural domains of the foot-and-mouth disease virus (FMDV) IRES, we have identified RNA-RNA interactions between separated domains (1-2, 3, 4-5, or HH) of the IRES structure. All the assayed domains were
Ricardo Ramos +1 more
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Guanidine-resistant mutants of aphthovirus induce the synthesis of an altered nonstructural polypeptide, P34 [PDF]
Extracts of cells infected with guanidine-resistant mutants of aphthovirus were examined for differences in virus-induced polypeptides by using electrofocusing. Four of 1 independent spontaneous mutants induced the synthesis of an altered nonstructural polypeptide, P34.
Keith Saunders, Andrew M. Q. King
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Statistical analyses of RNA folding in 5' nontranslated regions (5'NTR) of encephalomyocarditis virus, Theiler's murine encephalomyelitis virus, foot-and-mouth disease virus, and hepatitis A virus indicate that two highly significant folding regions occur in the 5' and 3' portions of the 5'NTR.
Shu‐Yun Le +3 more
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Conserved structural motifs located in distal loops of aphthovirus internal ribosome entry site domain 3 are required for internal initiation of translation [PDF]
A comparison of picornavirus internal ribosome entry site (IRES) secondary structures revealed the existence of conserved motifs located on loops. We have carried out a mutational analysis to test their requirement for IRES-driven translation. The GUAA sequence, located in the aphthovirus 3A loop, did not tolerate substitutions that disrupt the GNRA ...
Sonia López de Quinto +1 more
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Cell Recognition by Foot-and-Mouth Disease Virus That Lacks the RGD Integrin-Binding Motif: Flexibility in Aphthovirus Receptor Usage [PDF]
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
Éric Baranowski +5 more
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