dnaI

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{{one source|date=April 2024}}{{Infobox protein

| Name = Primosomal protein DnaI

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| Symbol = dnaI

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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.{{cite journal |last1=Bruand |first1=Claude |last2=Farache |first2=Michaël |last3=McGovern |first3=Stephen |last4=Ehrlich |first4=S. Dusko |last5=Polard |first5=Patrice |title=DnaB, DnaD and DnaI proteins are components of the Bacillus subtilis replication restart primosome |journal=Molecular Microbiology |date=October 2001 |volume=42 |issue=1 |pages=245–256 |doi=10.1046/j.1365-2958.2001.02631.x |url=https://onlinelibrary.wiley.com/doi/full/10.1046/j.1365-2958.2001.02631.x |language=en |issn=0950-382X}} They are involved in primosome function both at arrested replication forks and at the chromosomal origin.