Bacteria have 5 known DNA polymerases:
- Pol I: implicated in DNA repair; has 5'->3' (Polymerase) activity and both 3'->5' exonuclease (Proofreading) and 5'->3' exonuclease activity (RNA Primer removal).
- Pol II: involved in reparation of damaged DNA; has 3'->5' exonuclease activity.
- Pol III: the main polymerase in bacteria (elongates in DNA replication); has 3'->5' exonuclease proofreading ability.
- Pol IV: a Y-family DNA polymerase.
- Pol V: a Y-family DNA polymerase; participates in bypassing DNA damage.
Further Reading
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