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Orc3 Ubiquitin Ubiquitinated Cdc6 Cdt1 Cdt1 p70 Orc2 1. Assembly of the pre-replicative complex Mcm 4,6,7 trimer forms and associates with the replication fork RFC37 Cdt1 Orc3 Geminin Orc5 Mcm5 Origin Mcm3 Orc2 Cdc6 Ubiquitin Cdt1 Orc complex Ubiquitinated Orc1 RFC Heteropentamer: RNA primer-DNA primer RFC Heteropentamer: RNA primer-DNA primer PCNA homotrimer Pre-replicative complex Orc2 Degraded by proteasome in cytosol DNA polymerase alpha: primase: origin complex Orc5 Mcm3 Orc2 Mcm2 5. Leading/lagging strand synthesis RNA Primer Primase Cdc6 p49 Pre-replicative complex Orc3 Phosphorylation of Mcm 2-7 complex Orc complex Mcm6 Mcm7 Orc complex Mcm7 Orc complex Orc complex Cdc6 Mcm5 Orc4 p58 3. DNA replication initiation RNA primer-DNA primer RFC38 p180 Degraded by proteasome in cytosol 4. Switching of origins to post-replicative state Cdt1 2. Activation of the pre-replicative complex Phosphorylated Cdc6 Mcm6 Cdc6 Orc3 Orc1 RFC40 DNA Polymerase A Processive complex RNA primer-DNA primer: origin duplex:PCNA RFC140 Mcm4 Orc4 Mcm2 RNA primer-DNA primer Mcm10 Mcm4 DNA polymerase alpha: primase: origin complex Orc5 Phosphorylated Orc1 Mcm10 RFC36 AgaP_AGAP001971 AgaP_AGAP006065 POLD1 UTP AgaP_AGAP001929 ASK AgaP_AGAP011246 AgaP_AGAP004275 RPA3 CTP AgaP_AGAP006387 AgaP_AGAP009047 AgaP_AGAP007477 dUTP AgaP_AGAP010406 AgaP_AGAP001421 AgaP_AGAP005800 AgaP_AGAP007927 AgaP_AGAP004392 AgaP_AGAP008332 GTP CDC7 RPA4 ATP AgaP_AGAP004615 ADP AgaP_AGAP010220 ATP dATP AgaP_AGAP000978 POLD4 AgaP_AGAP008910 ATP AgaP_AGAP004614 AgaP_AGAP005144 GMNN AgaP_AGAP004579 AgaP_AGAP008723 POLD3 AgaP_AGAP000474 AgaP_AGAP005321 ATP AgaP_AGAP001135 AgaP_AGAP011961 AgaP_AGAP003093 AgaP_AGAP010219 dGTP dCTP AgaP_AGAP005176 AgaP_AGAP004408 AgaP_AGAP004957 AgaP_AGAP001290 ADP AgaP_AGAP004956 AgaP_AGAP007063
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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