Ribonuclease HII; Endonuclease that specifically degrades the RNA of RNA-DNA hybrids.

Holliday junction resolvase; Nuclease that resolves Holliday junction intermediates in genetic recombination. Cleaves the cruciform structure in supercoiled DNA by nicking to strands with the same polarity at sites symmetrically opposed at the junction in the homologous arms and leaves a 5'-terminal phosphate and a 3'-terminal hydroxyl group (By similarity).

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 [...]

Single-stranded DNA-binding protein; Plays an important role in DNA replication, recombination and repair. Binds to ssDNA and to an array of partner proteins to recruit them to their sites of action during DNA metabolism (By similarity). Essential for ionizing radiation resistance. Stimulates the 5'-3' DNA helicase activity of RecD-like helicase. Stimulates RecA protein- promoted DNA three-strand exchange reactions in vitro with both D.radiodurans and E.coli-derived RecA. Complements an ssb deletion in E.coli, but does not complement a ddrb disruption in D.radiodurans.

DNA-directed DNA polymerase; A DNA polymerase, required for DNA repair after DNA damage induced by ionizing radiation (IR); this is not the major DNA polymerase. Following severe irradiation (7 kGy of gamma irradiation) genomic DNA is fragmented. DNA is progressively degraded for the first 1.5 hours after IR, in a step promoted by RecA and counterbalanced by DNA Pol I and Pol III, followed by massive DNA synthesis and genome reassembly in the next hour. Optimal priming of DNA synthesis requires both RecA and RadA, Pol III initiates DNA synthesis while both Pol I and Pol III are require [...]

DNA polymerase III, tau/gamma subunit; DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity.

GMP synthase; Catalyzes the synthesis of GMP from XMP.

Conserved hypothetical protein; Similar to SP:Q10513 PID:1261931 GB:AL123456 percent identity: 44.26; identified by sequence similarity; putative.

Inorganic pyrophosphatase-related protein; Similar to GB:AE000511 SP:P56153 PID:2313741 percent identity: 71.43; identified by sequence similarity; putative.