DnaI

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Primosomal protein DnaI
Identifiers
Symbol	dnaI

DnaI is a protein that is part of the primosome involved in prokaryotic DNA replication. In Bacillus subtilis, genetic analysis has revealed three primosomal proteins, DnaB, DnaD, and DnaI, that have no obvious homologues in E. coli.^[1] They are involved in primosome function both at arrested replication forks and at the chromosomal origin.

References

^ Bruand, Claude; Farache, Michaël; McGovern, Stephen; Ehrlich, S. Dusko; Polard, Patrice (October 2001). "DnaB, DnaD and DnaI proteins are components of the Bacillus subtilis replication restart primosome". Molecular Microbiology. 42 (1): 245–256. doi:10.1046/j.1365-2958.2001.02631.x. ISSN 0950-382X.

DNA replication (comparing prokaryotic to eukaryotic)

Initiation

Prokaryotic (initiation)	Pre-replication complex dnaC Helicase dnaA dnaB T7 Primase dnaG
Eukaryotic (preparation in G1 phase)	Pre-replication complex Origin recognition complex ORC1 ORC2 ORC3 ORC4 ORC5 ORC6 Cdc6 Cdt1 Minichromosome maintenance MCM2 MCM3 MCM4 MCM5 MCM6 MCM7 Licensing factor Autonomously replicating sequence Single-strand binding protein SSBP2 SSBP3 SSBP4 RNase H RNASEH1 RNASEH2A Helicase: HFM1 Primase: PRIM1 PRIM2
Both	Origin of replication/Ori/Replicon Replication fork Lagging and leading strands Okazaki fragments Primer

Replication

Prokaryotic (elongation)	DNA polymerase III holoenzyme dnaC dnaE dnaH dnaN dnaQ dnaT dnaX holA holB holC holD holE Replisome DNA ligase DNA clamp Topoisomerase DNA gyrase Prokaryotic DNA polymerase: DNA polymerase I Klenow fragment
Eukaryotic (synthesis in S phase)	Replication factor C RFC1 Flap endonuclease FEN1 Topoisomerase Replication protein A RPA1 Eukaryotic DNA polymerase: alpha POLA1 POLA2 PRIM1 PRIM2 delta POLD1 POLD2 POLD3 POLD4 epsilon POLE POLE2 POLE3 POLE4 DNA clamp PCNA Control of chromosome duplication
Both	Movement: Processivity DNA ligase

Termination

Telomere: Telomerase
- TERT
- TERC
- DKC1

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