48 results found
    1. Cancer Biology
    2. Chromosomes and Gene Expression

    Characterization of the mechanism by which the RB/E2F pathway controls expression of the cancer genomic DNA deaminase APOBEC3B

    Pieter A Roelofs et al.
    The antiviral and genomic DNA deaminase APOBEC3B is repressed in normal cells by PRC1.6/E2F6 and DREAM/E2F4 complexes and deregulation of this axis provides a unifying mechanism for overexpression in cancer.
    1. Genetics and Genomics

    APOBEC3A deaminates transiently exposed single-strand DNA during LINE-1 retrotransposition

    Sandra R Richardson et al.
    Combining in vitro and in vivo assays demonstrates that the cytidine deaminase APOBEC3A can inhibit LINE-1 retrotransposition by deaminating transiently exposed single-strand DNA that arises during the process of LINE-1 integration.
    1. Chromosomes and Gene Expression

    DNA deaminases induce break-associated mutation showers with implication of APOBEC3B and 3A in breast cancer kataegis

    Benjamin JM Taylor et al.
    Enzymes that remove amine groups from cytosine bases in DNA are likely involved in generating the clusters of mutations (kataegis) seen in breast cancer.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Retrocopying expands the functional repertoire of APOBEC3 antiviral proteins in primates

    Lei Yang et al.
    Genomes take advantage of the gene-duplicating ability of retroelements to birth novel innate immune defense genes.
    1. Microbiology and Infectious Disease

    USP49 potently stabilizes APOBEC3G protein by removing ubiquitin and inhibits HIV-1 replication

    Ting Pan et al.
    USP49 can increase A3G protein expression and enhance its anti-HIV-1 activity, which is also correlated with hypermutations and affects the HIV-1 latent reservoir.
    1. Structural Biology and Molecular Biophysics

    HIV restriction factor APOBEC3G binds in multiple steps and conformations to search and deaminate single-stranded DNA

    Michael Morse et al.
    APOBEC3G, an anti-viral protein with the capability to inhibit HiV-1 infectivity, binds single stranded DNA in multiple physical conformations, enabling complex interactions that allow APOBEC3G to perform multiple diverse functions.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Perturbation of base excision repair sensitizes breast cancer cells to APOBEC3 deaminase-mediated mutations

    Birong Shen et al.
    Accumulation of mutations in some cancers is correlated with an aberration of DNA repair and access of a DNA deaminase to normal genomic DNA.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Repair of naturally occurring mismatches can induce mutations in flanking DNA

    Jia Chen et al.
    The repair of spontaneous DNA damage can introduce mutators that lead to further genetic changes, which could underlie evolutionary change, disease and aging.
    1. Chromosomes and Gene Expression
    2. Immunology and Inflammation

    Active RNAP pre-initiation sites are highly mutated by cytidine deaminases in yeast, with AID targeting small RNA genes

    Benjamin JM Taylor et al.
    Transcribed promoters are highly susceptible to mutation by cytidine deaminases, implicating stable exposure of single stranded DNA structures, rather than cofactors, in localising mutation during tumourigenesis and antibody maturation.
    1. Microbiology and Infectious Disease

    Antagonism of PP2A is an independent and conserved function of HIV-1 Vif and causes cell cycle arrest

    Sara Marelli et al.
    Systematic screen of HIV-1 Vif mutants identifies synthetic and naturally occurring amino acid polymorphisms separating PPP2R5 and APOBEC3 family protein depletion and uncovers the mechanism of Vif-dependent cell cycle arrest.

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