NAD(P)H dehydrogenase [quinone]; The enzyme catalyse the NAD(P)H-dependent two-electron reductions of quinones; It apparently serves as a quinone reductase in connection with conjugation reactions of hydroquinons to protect cells against damage by free radicals and reactive oxygen species; It has a preference for short-chain acceptor quinones, such as ubiquinone, benzoquinone, juglone and duroquinone; Uses a FAD cofactor; Localized in the cytoplasm; High confidence in function and specificity.

Menaquinone/ubiquinone biosynthesis methyltransferase; Methyltransferase required for the conversion of demethylmenaquinol (DMKH2) to menaquinol (MKH2).

Vitamin K-dependent gamma-glutamyl carboxylase is involved in the Vitamin K-dependent carboxylation of multiple amino-terminal glutamate residues in various proteins. It converts glutamate residues to gamma-carboxyglutamate; Contains six transmembrane helices; Localized in the cytoplasmic membrane; High confidence in function and specificity.

Ferredoxins are iron-sulfur proteins that transfer electrons in a wide variety of metabolic reactions. It binds two 4Fe-4S clusters; Localized in the cytoplasm; Function unclear.

Type I polyketide synthases are modular enzymes involved in the synthesis of various polyketides. This enzyme encompasses five modules: beta-ketoacyl synthase (KS), acyltransferase (AC), dehydratase (DH), enoyl reductase (ER) and acyl carrier protein (ACP). This modular enzyme is homologous to mycocerosic acid synthase (EC 2.3.1.111). Binds 1 phosphopantetheine group covalently. Localized in the cytoplasmic membrane; Specificity unclear.

Rieske [2Fe-2S] iron-sulfur protein; Protein that contains an unknown function N-terminal domain and a C-terminal Rieske [2Fe-2S] domain; The rieske domain has a [2Fe-2S] centre. Two conserved cysteines that one Fe ion while the other Fe ion is coordinated by two conserved histidines; Prokaryotic lipoprotein signal peptide cleaved between the residues 25 and 26; Localized in the outer membrane; Function unclear.

The AraC-type transcriptional regulators are usually involved in the positive regulation of catabolic, metabolic and transport operons; Contains a C-terminal AraC-type HTH DNA-binding domain involved in the binding of the protein to the operator sequences in the DNA and a N-terminal domain presumed to interact with effector molecules and may be involved in dimerization; Localized in the cytoplasm; Family membership.

Succinate dehydrogenase is a complex containing three subunits: a flavoprotein, an iron-sulfur protein and cytochrome b-558. It is involved in the citrate cycle and catalyzes the reaction: succinate + acceptor = fumarate + reduced acceptor. It uses a FAD as a cofactor. SdhB is the iron-sulfur subunit. Localized in the cytoplasm; High confidence in function and specificity.

The phytoene synthetase (PSY) catalyzes the conversion of two molecules of geranylgeranyl diphosphate (GGPP) into phytoene. It is the second step in the biosynthesis of carotenoids from isopentenyl diphosphate. The reaction carried out by PSY is catalyzed in two separate steps: the first is a head-to-head condensation of the two molecules of GGPP to form prephytoene diphosphate, this intermediate is then rearranged to form phytoene; Belongs to the phytoene/squalene synthetase family; Localized in the cytoplasm; High confidence in function and specificity.