DNA primase is a form of RNA polymerase and a product of the dnaG gene. In bacteria, primase binds to the DNA helicase forming a complex called the primosome. Primase is activated by DNA helicase where it then synthesizes a short RNA primer approximately 11 ±1 nucleotides long, to which new nucleotides can be added by DNA polymerase. Primase is of key importance in DNA replication because no known DNA polymerases can initiate the synthesis of a DNA strand without initial RNA primers.
- Overview article on primase structure and function (1995)
- DNA+Primase at the US National Library of Medicine Medical Subject Headings (MeSH)
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