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ArcPathVisio Brace Ellipse EndoplasmicReticulum GolgiApparatus HexagonPathVisio MimDegradation Mitochondria Octagon PentagonPathVisio Rectangle RoundedRectangle SarcoplasmicReticulum TriangleEquilateralEast TrianglePathVisio none Cdc6 Orc3 Mcm2 Ubiquitinated Cdc6 Mcm4 DNA polymerase alpha: primase: origin complex Ubiquitinated Orc1 ADP RNA primer-DNA primer Cdt1 Degraded by proteasome in cytosol ATP Pre-replicative complex Degraded by proteasome in cytosol with the replication fork Orc3 Orc complex Mcm10 dUTP Phosphorylation of Mcm 2-7 complex Orc complex ATP Orc4 Orc complex CTP Ubiquitin Orc2 ADP Mcm6 4. Switching of origins to post-replicative state Mcm6 1. Assembly of the pre-replicative complex Orc5 DNA polymerase alpha: primase: origin complex Mcm3 Ubiquitin dATP Orc4 a Mcm5 Cdc6 Mcm 4,6,7 trimer forms and associates 2. Activation of the pre-replicative complex Orc complex Cdc6 Mcm3 Mcm5 RNA primer-DNA primer Phosphorylated Orc1 Orc3 ATP RFC140 Orc2 Mcm7 p70 RFC36 Orc2 Orc5 Cdt1 RFC Heteropentamer:RNA primer-DNA primer Cdt1 RNA primer-DNA primer:origin duplex:PCNA RNA Primer 5. Leading/lagging strand synthesis Cdt1 Mcm2 Cdt1 PCNA homotrimer Mcm4 Primase Origin Cdc6 RFC38 ATP Phosphorylated Cdc6 GTP RFC Heteropentamer:RNA primer-DNA primer: DNA Polymerase Orc5 Geminin Orc Complex p49 dCTP RFC40 p58 Processive complex Orc3 Mcm7 RFC37 Pre-replicative complex dGTP p180 3. DNA replication initiation Orc1 Orc2 UTP zgc:110727 CDC6 POLE2 zgc:77841 rfc4 rfc5 rpa2 UBC POLE POLD1 mcm2 pcna rfc3 mcm5 zgc:77827 zgc:85772 pold2 rpa1 UBA52 MCM10 POLA1 ASK zgc:101602 prim1 POLD3 gmnn ORC2 RFC1 orc3l MCM6 mcm3 CDT1 zgc:56598 zgc:56310 orc6 mcm4 MCM7 POLD4 RPA4 zgc:56264 zgc:110810 orc1 POLA2 Name: DNA replication Last Modified: 10/17/2013 Organism: Danio rerio
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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