Putative cytoplasmic protein; Similar to E. coli orf, hypothetical protein (AAC74867.1); Blastp hit to AAC74867.1 (119 aa), 42% identity in aa 2 - 113.

Putative cytoplasmic protein; Similar to E. coli orf, hypothetical protein (AAC75774.1); Blastp hit to AAC75774.1 (117 aa), 86% identity in aa 1 - 114.

Putative cell morphogenesis; Di-iron-containing protein involved in the repair of iron- sulfur clusters damaged by oxidative and nitrosative stress conditions.

NADH oxidoreductase for hcp gene product; Similar to E. coli putative enzyme (AAC73959.1); Blastp hit to AAC73959.1 (322 aa), 90% identity in aa 1 - 322.

Putative ABC superfamily transport protein; Membrane; similar to E. coli orf, hypothetical protein (AAC75614.1); Blastp hit to AAC75614.1 (306 aa), 83% identity in aa 25 - 306.

Putative negative regulator; Nitric oxide-sensitive repressor of genes involved in protecting the cell against nitrosative stress. May require iron for activity. Represses hmp expression under conditions of elevated intracellular iron concentrations, in the absence of nitric oxide.

Dihydropteridine reductase 2; Is involved in NO detoxification in an aerobic process, termed nitric oxide dioxygenase (NOD) reaction that utilizes O(2) and NAD(P)H to convert NO to nitrate, which protects the bacterium from various noxious nitrogen compounds. Therefore, plays a central role in the inducible response to nitrosative stress. Belongs to the globin family. Two-domain flavohemoproteins subfamily.

O-6-alkylguanine-DNA; Involved in the cellular defense against the biological effects of O6-methylguanine (O6-MeG) and O4-methylthymine (O4-MeT) in DNA. Repairs the methylated nucleobase in DNA by stoichiometrically transferring the methyl group to a cysteine residue in the enzyme. This is a suicide reaction: the enzyme is irreversibly inactivated.

Putative cytoplasmic protein; Similar to E. coli orf, hypothetical protein (AAC74250.1); Blastp hit to AAC74250.1 (88 aa), 41% identity in aa 23 - 88.