title: Multiple invasions of an infectious retrovirus in cat genomes.
abstract: Endogenous retroviruses (ERVs) are remnants of ancient retroviral infections of host germ-line cells. While most ERVs are defective, some are active and express viral proteins. The RD-114 virus is a replication-competent feline ERV, and several feline cell lines produce infectious RD-114 viral particles. All domestic cats are considered to have an ERV locus encoding a replication-competent RD-114 virus in their genomes; however, the locus has not been identified. In this study, we investigated RD-114 virus-related proviral loci in genomes of domestic cats, and found that none were capable of producing infectious viruses. We also found that all domestic cats have an RD-114 virus-related sequence on chromosome C2, termed RDRS C2a, but populations of the other RDRSs are different depending on the regions where cats live or breed. Our results indicate that RDRS C2a, the oldest RD-114-related provirus, entered the host genome before an ancestor of domestic cats started diverging and the other new RDRSs might have integrated into migrating cats in Europe. We also show that infectious RD-114 virus can be resurrected by the recombination between two non-infectious RDRSs. From these data, we conclude that cats do not harbor infectious RD-114 viral loci in their genomes and RD-114-related viruses invaded cat genomes multiple times.
authors: Laboratory of Signal Transduction, Department of Cell Biology, Institute for Virus Research, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8501, Japan.
authors: Sayumi
authors: S
authors: Shimode
authors: Department of Molecular Life Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
authors: So
authors: S
authors: Nakagawa
authors: Laboratory of Signal Transduction, Department of Cell Biology, Institute for Virus Research, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8501, Japan.
authors: Takayuki
authors: T
authors: Miyazawa
mesh_terms: D000818:Animals; D001483:Base Sequence; D015139:Blotting, Southern; D002415:Cats / Q000235:genetics* / Q000821:virology*; D002460:Cell Line; D002875:Chromosomes / Q000235:genetics; D020077:Endogenous Retroviruses / Q000145:classification / Q000235:genetics*; D056426:Genetic Loci; D016678:Genome; D057809:HEK293 Cells; D006801:Humans; D008969:Molecular Sequence Data; D011533:Proviruses / Q000145:classification / Q000235:genetics; D012367:RNA, Viral / Q000737:chemistry
chemical_list: D012367:RNA, Viral
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