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1, 2 Mcm3 Orc complex Mcm7 Mcm5 Mcm4 Degraded by proteasome in cytosol RNA primer-DNA primer: origin duplex:PCNA Cdt1 Mcm7 5. Leading/lagging strand synthesis p58 Geminin Orc2 Cdc6 RFC140 Orc complex Orc5 Orc1 Mcm3 3. DNA replication initiation p70 Primase Orc2 Cdc6 p180 DNA polymerase alpha: primase: origin complex Mcm4 Pre-replicative complex Orc complex RFC36 RNA primer-DNA primer Orc2 Processive complex Mcm6 Ubiquitinated Orc1 RNA primer-DNA primer 1. Assembly of the pre-replicative complex Mcm6 Phosphorylated Cdc6 Ubiquitin Cdt1 DNA Polymerase A Orc4 Mcm5 Origin RNA Primer Mcm 4,6,7 trimer forms and associates with the replication fork Mcm2 Orc4 Degraded by proteasome in cytosol Pre-replicative complex Orc3 Mcm2 Phosphorylation of Mcm 2-7 complex Mcm10 Orc complex RFC Heteropentamer: RNA primer-DNA primer RFC40 Orc3 Cdc6 Orc3 DNA polymerase alpha: primase: origin complex Orc3 RFC Heteropentamer: RNA primer-DNA primer PCNA homotrimer Phosphorylated Orc1 Ubiquitin Cdt1 Orc complex 4. Switching of origins to post-replicative state Cdt1 Ubiquitinated Cdc6 Mcm10 RFC37 p49 Cdt1 RFC38 Orc5 2. Activation of the pre-replicative complex Cdc6 Orc5 Orc2 AgaP_AGAP010219 AgaP_AGAP004614 AgaP_AGAP010406 AgaP_AGAP005176 RPA4 AgaP_AGAP005800 CTP AgaP_AGAP006387 AgaP_AGAP004579 RPA3 dUTP ASK ATP AgaP_AGAP005321 AgaP_AGAP011246 AgaP_AGAP008332 AgaP_AGAP000474 AgaP_AGAP004275 AgaP_AGAP006065 ATP GTP AgaP_AGAP001135 dCTP AgaP_AGAP001971 AgaP_AGAP008910 AgaP_AGAP003093 AgaP_AGAP007063 ATP dGTP AgaP_AGAP004956 AgaP_AGAP007927 ADP AgaP_AGAP001290 ATP ADP AgaP_AGAP000978 POLD1 AgaP_AGAP011961 AgaP_AGAP008723 dATP POLD4 AgaP_AGAP009047 AgaP_AGAP010220 AgaP_AGAP004408 AgaP_AGAP001421 CDC7 GMNN POLD3 AgaP_AGAP001929 AgaP_AGAP005144 AgaP_AGAP007477 AgaP_AGAP004392 UTP AgaP_AGAP004615 AgaP_AGAP004957
Description
DNA replication, the basis for biological inheritance, is a fundamental process occurring in all living organisms to copy their DNA. This process is "replication" in that each strand of the original double-stranded DNA molecule serves as template for the reproduction of the complementary strand. Hence, following DNA replication, two identical DNA molecules have been produced from a single double-stranded DNA molecule. Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication.
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