Ubiquinone biosynthesis O-methyltransferase, mitochondrial; O-methyltransferase that catalyzes the 2 O-methylation steps in the ubiquinone biosynthetic pathway; Belongs to the class I-like SAM-binding methyltransferase superfamily. UbiG/COQ3 family.

4-hydroxybenzoate polyprenyltransferase, mitochondrial; Catalyzes the prenylation of para-hydroxybenzoate (PHB) with an all-trans polyprenyl group. Mediates the second step in the final reaction sequence of coenzyme Q (CoQ) biosynthesis, which is the condensation of the polyisoprenoid side chain with PHB, generating the first membrane-bound Q intermediate; Belongs to the UbiA prenyltransferase family.

Ubiquinone biosynthesis protein COQ4 homolog, mitochondrial; Component of the coenzyme Q biosynthetic pathway. May play a role in organizing a multi-subunit COQ enzyme complex required for coenzyme Q biosynthesis. Required for steady-state levels of other COQ polypeptides.

5-demethoxyubiquinone hydroxylase, mitochondrial; Catalyzes the hydroxylation of 2-polyprenyl-3-methyl-6- methoxy-1,4-benzoquinol (DMQH2) during ubiquinone biosynthesis. Has also a structural role in the COQ enzyme complex, stabilizing other COQ polypeptides. Involved in lifespan determination in a ubiquinone- independent manner.

Coenzyme Q8; Protein kinase activity; kinase activity. It is involved in the biological process described with: mitochondrial electron transport, ubiquinol to cytochrome c; ubiquinone biosynthetic process.

Decaprenyl diphosphate synthase subunit 2, isoform A; Prenyltransferase activity; trans-hexaprenyltranstransferase activity. It is involved in the biological process described with: isoprenoid biosynthetic process; ubiquinone biosynthetic process; Belongs to the FPP/GGPP synthase family.

3-hydroxy-3-methylglutaryl coenzyme A synthase; This enzyme condenses acetyl-CoA with acetoacetyl-CoA to form HMG-CoA, which is the substrate for HMG-CoA reductase.

3-hydroxy-3-methylglutaryl-coenzyme A reductase; Synthesis of mevalonate for the production of non-sterol isoprenoids, which are essential for growth differentiation. Provides spatial information during embryogenesis to guide migrating primordial germ cells (the pole cells) from the ectoderm to the mesoderm. Also required for association of the pole cells with the gonadal mesoderm. Belongs to the HMG-CoA reductase family.

AarF domain-containing kinase 1; Essential for maintaining mitochondrial cristae formation and mitochondrial function by acting via YME1L to regulate the mitochondrial structural proteins Opa1 and Mitofilin. This function is likely to be kinase-independent (By similarity). Functions in tracheal development and larval molting probably by acting in sterol modification and/or intracellular lipid trafficking. The action of this enzyme is not yet clear (Probable). It is not known if it has protein kinase activity and what type of substrate it would phosphorylate (Ser, Thr or Tyr) (Probable).