DNA topoisomerase I; Releases the supercoiling and torsional tension of DNA, which is introduced during the DNA replication and transcription, by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA- (5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand then undergoes passage around the unbroken strand, thus removing DNA supe [...]

COGs: COG0514 Superfamily II DNA helicase; InterPro IPR001650: IPR002121: IPR011545: IPR018982: IPR 014001: IPR014021: IPR018329: IPR006293; KEGG: she:Shewmr4_3590 ATP-dependent DNA helicase RecQ; PFAM: RQC domain; DEAD/DEAH box helicase domain protein; HRDC domain protein; helicase domain protein; SMART: DEAD-like helicase; helicase domain protein; HRDC domain protein; SPTR: A2UXP2 ATP-dependent DNA helicase RecQ; TIGRFAM: ATP-dependent DNA helicase RecQ; ATP-dependent DNA helicase, RecQ family; PFAM: Helicase conserved C-terminal domain; RQC domain; HRDC domain; DEAD/DEAH box helicas [...]

DNA polymerase I; In addition to polymerase activity, this DNA polymerase exhibits 5'-3' exonuclease activity; Belongs to the DNA polymerase type-A family.

Exodeoxyribonuclease I subunit D; SbcCD cleaves DNA hairpin structures. These structures can inhibit DNA replication and are intermediates in certain DNA recombination reactions. The complex acts as a 3'->5' double strand exonuclease that can open hairpins. It also has a 5' single-strand endonuclease activity; Belongs to the SbcD family.

recA protein; Can catalyze the hydrolysis of ATP in the presence of single- stranded DNA, the ATP-dependent uptake of single-stranded DNA by duplex DNA, and the ATP-dependent hybridization of homologous single-stranded DNAs. It interacts with LexA causing its activation and leading to its autocatalytic cleavage; Belongs to the RecA family.

DNA topoisomerase III; Releases the supercoiling and torsional tension of DNA, which is introduced during the DNA replication and transcription, by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA- (5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand then undergoes passage around the unbroken strand, thus removing DNA su [...]

COGs: COG0258 5'-3' exonuclease (including N-terminal domain of PolI); InterPro IPR020046: IPR020047: IPR008918: IPR002421; KEGG: shw:Sputw3181_2814 exonuclease IX; PFAM: 5'-3' exonuclease, N-terminal resolvase-like domain; 5'-3' exonuclease, SAM-fold domain; SMART: 5'-3' exonuclease; Helix-hairpin-helix domain protein class 2; SPTR: A2UVF4 5'-3' exonuclease; PFAM: 5'-3' exonuclease, C-terminal SAM fold; 5'-3' exonuclease, N-terminal resolvase-like domain.

SMC domain protein; COGs: COG0419 ATPase involved in DNA repair; InterPro IPR003395; KEGG: aha:AHA_3045 exonuclease SbcC; PFAM: SMC domain protein; SPTR: Q9HWB8 Nuclease sbcCD subunit C; TIGRFAM: exonuclease SbcC.

DNA mismatch repair protein MutL; This protein is involved in the repair of mismatches in DNA. It is required for dam-dependent methyl-directed DNA mismatch repair. May act as a 'molecular matchmaker', a protein that promotes the formation of a stable complex between two or more DNA-binding proteins in an ATP-dependent manner without itself being part of a final effector complex.