Protein
Ubiquinone biosynthesis O-methyltransferase, mitochondrial
Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Function
O-methyltransferase that catalyzes the 2 O-methylation steps in the ubiquinone biosynthetic pathway. Catalyzes the methylation of 3,4-dihydroxy-5-hexaprenylbenzoate (DHHB) to 3-methoxy-4-hydroxy-5-hexaprenylbenzoate (HMHB) and the methylation of 2-hexaprenyl-3-methyl-5-hydroxy-6-methoxy-1,4-benzoquinol (3-demethylubiquinol-6) to ubiquinol-6.
Similarity
Belongs to the class I-like SAM-binding methyltransferase superfamily. UbiG/COQ3 family.
Sequence
MLLRSRFLKVIHVRKQLSACSRFAIQTQTRCKSTDASEDEVKHFQELAPTWWDTDGSQRILHKMNLTRLDFVQRTVRNQVKIQNPEIFVPGFNYKEFLPEYVCDNIQREMQESIETNLDKRPEVSVLDVGCGGGILSESLARLKWVKNVQGIDLTRDCIMVAKEHAKKDPMLEGKINYECKALEDVTGQFDIITCMEMLEHVDMPSEILRHCWSRLNPEKGILFLSTINRDLISWFTTIFMGENVLKIVPKGTHHLSKYINSKEILAWFNDNYSGQFRLLDLKGTMYLPYQGWVEHDCSDVGNYFMAIQRLN