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Annotation rule MF_03193
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General rule information [?]

Accession MF_03193
Dates 20-MAR-2015 (Created)
7-JUL-2020 (Last updated, Version 8)
Name COQ6_monooxygenase
Scope
Eukaryota
Template P53318 (COQ6_YEAST)

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
COQ6
Protein name
RecName: Full=Ubiquinone biosynthesis monooxygenase COQ6, mitochondrial;
EC 1.14.13.-;
case <OC:Vertebrata>
Protein name
Full=Coenzyme Q10 monooxygenase 6;
end case
case <OC:Vertebrata> or <OC:Fungi> or <OC:Viridiplantae>
Gene name
COQ6
else case <OC:Drosophilidae>
Gene name
Coq6
else case <OC:Insecta> or <OC:Dictyostelia>
Gene name
coq6
else case <OC:Caenorhabditis>
Gene name
coq-6
end case

Comments [?]

case <OC:Saccharomyces>
Function FAD-dependent monooxygenase required for the C5-ring hydroxylation during ubiquinone biosynthesis. Catalyzes the hydroxylation of 3-hexaprenyl-4-hydroxybenzoic acid (HHB) to 3-hexaprenyl-4,5-dihydroxybenzoic acid (DHHB). The electrons required for the hydroxylation reaction may be funneled indirectly from NADPH via ferredoxin (YAH1) and ferredoxin reductase (ARH1) to COQ6. Can also convert 3-hexaprenyl-4-aminobenzoic acid (HAB), a COQ2-prenylated pABA, to DHHB in a two step process. HAB is first hydroxylated at C5 to yield 3-hexaprenyl-4-amino-5-hydroxybenzoic acid (HHAB) which is further deaminated at C4 by COQ6 to produce DHHB.
Catalytic activity RHEA:20361: 4-hydroxy-3-all-trans-hexaprenylbenzoate + 2 H(+) + O2 + 2 reduced [2Fe-2S]-[ferredoxin] = 3,4-dihydroxy-5-all-trans-hexaprenylbenzoate + H2O + 2 oxidized [2Fe-2S]-[ferredoxin]
RHEA:58392: 4-amino-3-all-trans-hexaprenylbenzoate + 2 H(+) + O2 + 2 reduced [2Fe-2S]-[ferredoxin] = 4-amino-5-hydroxy-3-all-trans-hexaprenylbenzoate + H2O + 2 oxidized [2Fe-2S]-[ferredoxin]
RHEA:58396: 4-amino-5-hydroxy-3-all-trans-hexaprenylbenzoate + 5 H(+) + O2 + 4 reduced [2Fe-2S]-[ferredoxin] = 3,4-dihydroxy-5-all-trans-hexaprenylbenzoate + H2O + NH4(+) + 4 oxidized [2Fe-2S]-[ferredoxin]
else
Function FAD-dependent monooxygenase required for the C5-ring hydroxylation during ubiquinone biosynthesis. Catalyzes the hydroxylation of 3-polyprenyl-4-hydroxybenzoic acid to 3-polyprenyl-4,5-dihydroxybenzoic acid. The electrons required for the hydroxylation reaction may be funneled indirectly from NADPH via a ferredoxin/ferredoxin reductase system to COQ6.
Catalytic activity RHEA:20361: 4-hydroxy-3-all-trans-hexaprenylbenzoate + 2 H(+) + O2 + 2 reduced [2Fe-2S]-[ferredoxin] = 3,4-dihydroxy-5-all-trans-hexaprenylbenzoate + H2O + 2 oxidized [2Fe-2S]-[ferredoxin]
end case
Cofactor FAD
Pathway Cofactor biosynthesis; ubiquinone biosynthesis.
case <OC:Vertebrata>
Subunit Component of a multi-subunit COQ enzyme complex, composed of at least @gn(COQ3), @gn(COQ4), @gn(COQ5), @gn(COQ6), @gn(COQ7) and @gn(COQ9). Interacts with @gn(ADCK4) and @gn(COQ7).
else case <OC:Fungi>
Subunit Component of a multi-subunit COQ enzyme complex, composed of at least @gn(COQ3), @gn(COQ4), @gn(COQ5), @gn(COQ6), @gn(COQ7) and @gn(COQ9).
else
Subunit Component of a multi-subunit COQ enzyme complex.
end case
case <OC:Vertebrata>
Subcellular location Mitochondrion inner membrane; Peripheral membrane protein; Matrix side. Golgi apparatus. Cell projection. Note=Localizes to cell processes and Golgi apparatus in podocytes.
else
Subcellular location Mitochondrion inner membrane; Peripheral membrane protein; Matrix side.
end case
case not <AnyFeature:TransitM>
Miscellaneous This protein may be expected to contain an N-terminal transit peptide but none has been predicted.
end case
Similarity Belongs to the UbiH/COQ6 family.

Keywords [?]

case <OC:Vertebrata>
end case

Gene Ontology [?]

GO:0031314; Cellular component: extrinsic component of mitochondrial inner membrane.
case <OC:Vertebrata>
GO:0042995; Cellular component: cell projection.
GO:0005794; Cellular component: Golgi apparatus.
end case
GO:0016712; Molecular function: oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen.
GO:0006744; Biological process: ubiquinone biosynthetic process.

Cross-references [?]

PROSITE PS01304; UBIH; 1;
Pfam PF01494; FAD_binding_3; 1;
PRINTS PR00420; RNGMNOXGNASE; 1;
TIGRFAMs TIGR01989; COQ6; 1;
TIGR01988; Ubi-OHases; 1;

Computed features [?]

General TransitM; -; 0-1; trigger=yes;

Additional information [?]

Size range 451-605 amino acids
Related rules None
Fusion None