468 results found
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Co-option of an endogenous retrovirus envelope for host defense in hominid ancestors

    Daniel Blanco-Melo et al.
    The reconstitution of a functional envelope protein from an extinct hominid retrovirus reveals its receptor and an ancient host defense that may have led to the extinction of the virus.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Systematic perturbation of retroviral LTRs reveals widespread long-range effects on human gene regulation

    Daniel R Fuentes et al.
    A new approach combines guide RNA multiplexing with CRISPR activation and interference to facilitate functional studies of transposable elements present in hundreds of copies throughout the human genome.
    1. Chromosomes and Gene Expression

    Spen links RNA-mediated endogenous retrovirus silencing and X chromosome inactivation

    Ava C Carter et al.
    A long noncoding RNA uses viral mimicry to achieve developmental gene silencing across a chromosome.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Tracking interspecies transmission and long-term evolution of an ancient retrovirus using the genomes of modern mammals

    William E Diehl et al.
    Endogenous virus sequences in the genomes of modern mammals reveal the global spread of an ancient virus lineage, including frequent interspecies transmission, adaptation, and emergence spanning several million years of mammalian evolution
    1. Developmental Biology
    2. Evolutionary Biology

    Domestic chickens activate a piRNA defense against avian leukosis virus

    Yu Huining Sun et al.
    To protect the germ line genome, chickens acquire new small RNA-based immune defense in response to recently endogenized retroviruses by turning a truncated provirus into a weapon.
    1. Developmental Biology

    Stella modulates transcriptional and endogenous retrovirus programs during maternal-to-zygotic transition

    Yun Huang et al.
    Soon after fertilisation, a critical portion of the embryonic genome is switched on through the actions of maternally inherited Stella, in part through controlling the activation of transposable elements.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of B-box 2 domain-mediated higher-order assembly of the retroviral restriction factor TRIM5α

    Jonathan M Wagner et al.
    Higher-order assembly enables and links pathogen recognition and downstream steps in the TRIM5-mediated anti-HIV response.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Mutational resilience of antiviral restriction favors primate TRIM5α in host-virus evolutionary arms races

    Jeannette L Tenthorey et al.
    Mutations in the TRIM5α retrovirus-binding interface frequently improve but rarely disrupt retroviral restriction.
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    Primate TRIM5 proteins form hexagonal nets on HIV-1 capsids

    Yen-Li Li et al.
    To protect mammals against retroviral infections, TRIM5 restriction factors recognize viral capsids by forming complementary hexagonal nets that can adapt to the patterns of capsid protein subunits on the viral capsid surface.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Regulatory Networks: Reality check for transposon enhancers

    Julie Brind'Amour, Dixie L Mager
    Hundreds of retrovirus-like sequences have features that suggest they might be gene enhancers, but only a small fraction displays gene-regulating activity in experiments on mouse stem cells.
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