6,391 results found
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    The eukaryotic bell-shaped temporal rate of DNA replication origin firing emanates from a balance between origin activation and passivation

    Jean-Michel Arbona et al.
    The universal eukaryotic DNA replication kinetics is the consequence of simple physicochemical rules resulting from the localisation of potential replication origins at discrete sites and the diffusion of limiting origin firing factors in the nuclear space.
    1. Chromosomes and Gene Expression

    Dynamic relocalization of replication origins by Fkh1 requires execution of DDK function and Cdc45 loading at origins

    Haiyang Zhang et al.
    Establishment of replication-timing involves Fkh1-dependent recruitment and execution of DDK function in G1 phase resulting in dynamic relocalization of origins within the nucleus in anticipation of CDK-dependent origin activation.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Pervasive transcription fine-tunes replication origin activity

    Tito Candelli et al.
    The pervasive transcription environment alters the efficiency of firing of replication origins, which are 'protected' by roadblock termination due to origin recognition complex (ORC) and pre-RC complexes.
    1. Developmental Biology
    2. Chromosomes and Gene Expression

    Spatiotemporal coupling and decoupling of gene transcription with DNA replication origins during embryogenesis in C. elegans

    Ehsan Pourkarimi et al.
    Replication origins are fundamental organizers and regulators of gene activity through embryonic development.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Nucleosomes influence multiple steps during replication initiation

    Ishara F Azmi et al.
    Nucleosomal DNAs assembled or modified by different chromatin remodeling enzymes differentially impact the origin licensing and helicase activation steps of replication initiation.
    1. Chromosomes and Gene Expression

    Rapid DNA replication origin licensing protects stem cell pluripotency

    Jacob Peter Matson et al.
    The unique cell cycle variations of pluripotent stem cells ensures that the first step in DNA replication is particularly fast and this rapid rate, in turn, restrains early differentiation.
    1. Biochemistry and Chemical Biology

    An explanation for origin unwinding in eukaryotes

    Lance D Langston, Michael E O'Donnell
    CMG helicase translocates with force while encircling duplex DNA, enabling two opposing CMG complexes at an origin to melt the duplex and switch to encircling separate single strands.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    A conserved Mcm4 motif is required for Mcm2-7 double-hexamer formation and origin DNA unwinding

    Kanokwan Champasa et al.
    Analysis of an essential motif in Mcm4 provides insights into replicative helicase double-hexamer formation and the first step requiring this intermediate during replication initiation.
    1. Cell Biology

    DNA Replication: Rethinking origin licensing

    Stephen P Bell
    Human cells that lack a subunit in their origin recognition complex are viable, which suggests the existence of alternative mechanisms to initiate DNA replication.
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