title: An African swine fever virus ORF with similarity to C-type lectins is non-essential for growth in swine macrophages in vitro and for virus virulence in domestic swine.
abstract: An African swine fever virus (ASFV) ORF, 8CR, with similarity to the C-type lectin family of adhesion proteins has been described in the pathogenic isolate Malawi Lil-20/1. The similarity of 8CR to cellular and poxvirus genes associated with cell adhesion, cell recognition and virus infectivity suggested that 8CR may be of significance to ASFV-host cell interactions. Sequence analysis of the 8CR ORF from additional pathogenic ASFV isolates demonstrated conservation among isolates from both pig and tick sources. Northern blot analysis demonstrated 8CR mRNA transcription late in the virus replication cycle. A Malawi Lil-20/1 8CR deletion mutant (delta8CR) was constructed to analyse 8CR function further. The growth characteristics in vitro of delta8CR in porcine macrophage cell cultures were identical to those observed for parental virus. In domestic swine, delta8CR exhibited an unaltered parental Malawi Lil-20/1 disease and virulence phenotype. Thus, although well conserved among pathogenic ASFV field isolates, 8CR is non-essential for growth in porcine macrophages in vitro and for virus virulence in domestic swine.
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: J G
authors.initials: JG
authors.lastname: Neilan
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: M V
authors.initials: MV
authors.lastname: Borca
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: Z
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: G F
authors.initials: GF
authors.lastname: Kutish
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: S B
authors.initials: SB
authors.lastname: Kleiboeker
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: C
authors.initials: C
authors.lastname: Carrillo
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: L
authors.initials: L
authors.lastname: Zsak
authors.affiliation: Plum Island Animal Disease Center, Agricultural Research Service, US Department of Agriculture, PO Box 848, Greenport, NY 11944-0848, USA1.
authors.forename: D L
authors.initials: DL
authors.lastname: Rock
mesh_terms: D000357:African Swine Fever / Q000821:virology; D000358:African Swine Fever Virus / Q000235:genetics* / Q000254:growth & development / Q000472:pathogenicity*; D000595:Amino Acid Sequence; D000818:Animals; D000829:Animals, Domestic; D001483:Base Sequence; D004279:DNA, Viral; D020043:Genes, Essential; D037102:Lectins; D008264:Macrophages / Q000821:virology*; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D013552:Swine; D014158:Transcription, Genetic; D014774:Virulence
chemical_list: D004279:DNA, Viral; D037102:Lectins