| Methylated-DNA--protein-cysteine methyltransferase | Humans | Involved in the cellular defense against the biological effects of O6-methylguanine (O6-MeG) and O4-methylthymine (O4... more | 12 | Details |
| Methylcrotonoyl-CoA carboxylase beta chain, mitochondrial | Humans | Carboxyltransferase subunit of the 3-methylcrotonyl-CoA carboxylase, an enzyme that catalyzes the conversion of 3-met... more | 1 | Details |
| Methylcrotonoyl-CoA carboxylase subunit alpha, mitochondrial | Humans | Biotin-attachment subunit of the 3-methylcrotonyl-CoA carboxylase, an enzyme that catalyzes the conversion of 3-methy... more | 1 | Details |
| Methylenetetrahydrofolate reductase | Thermus thermophilus | Not Available | 1 | Details |
| Methylenetetrahydrofolate reductase (NADPH) | Humans | Catalyzes the conversion of 5,10-methylenetetrahydrofolate to 5-methyltetrahydrofolate, a cosubstrate for homocystein... more | 10 | Details |
| Methylglyoxal synthase | Shigella flexneri | Catalyzes the formation of methylglyoxal from dihydroxyacetone phosphate. | 3 | Details |
| Methylmalonate-semialdehyde/malonate-semialdehyde dehydrogenase [acylating], mitochondrial | Humans | Malonate and methylmalonate semialdehyde dehydrogenase involved in the catabolism of valine, thymine, and compounds c... more | 1 | Details |
| Methylmalonic aciduria type A protein, mitochondrial | Humans | GTPase, binds and hydrolyzes GTP. Involved in intracellular vitamin B12 metabolism, mediates the transport of cobalam... more | 2 | Details |
| Methylmalonyl-CoA carboxyltransferase 12S subunit | Propionibacterium freudenreichii subsp. shermanii | The 12S subunit specifically catalyzes the transfer of the carboxyl group of methylmalonyl CoA to the biotin of the 1... more | 2 | Details |
| Methylmalonyl-CoA carboxyltransferase 5S subunit | Propionibacterium freudenreichii subsp. shermanii | The 5S subunit specifically catalyzes the transfer of the carboxyl group from biotin of the 1.3S subunit to pyruvate ... more | 3 | Details |
| Methylmalonyl-CoA decarboxylase | Escherichia coli (strain K12) | Catalyzes the decarboxylation of (R)-methylmalonyl-CoA to propionyl-CoA. Could be part of a pathway that converts suc... more | 1 | Details |
| Methylmalonyl-CoA mutase, mitochondrial | Humans | Catalyzes the reversible isomerization of methylmalonyl-CoA (MMCoA) (generated from branched-chain amino acid metabol... more | 4 | Details |
| Methylsterol monooxygenase 1 | Humans | Catalyzes the three-step monooxygenation required for the demethylation of 4,4-dimethyl and 4alpha-methylsterols, whi... more | 1 | Details |
| Mevalonate kinase | Humans | Catalyzes the phosphorylation of mevalonate to mevalonate 5-phosphate, a key step in isoprenoid and cholesterol biosy... more | 1 | Details |
| MexAB-OprM efflux system | Pseudomonas aeruginosa (strain ATCC 15692 / PAO1 / 1C / PRS 101 / LMG 12228) | A protein complex which confers multi-drug resistance via efflux. | 1 | Details |
| MHC class I HLA-A protein | Humans | Not Available | 8 | Details |
| MHC class II protein complex | Humans | A transmembrane protein complex composed of an MHC class II alpha and MHC class II beta chain, and with or without a ... more | 1 | Details |
| Microbial proteins | Not Available | Not Available | 1 | Details |
| microRNA 17 | Humans | Not Available | 1 | Details |
| Microsomal glutathione S-transferase 1 | Humans | Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles | 3 | Details |
| Microsomal glutathione S-transferase 2 | Humans | Catalyzes several different glutathione-dependent reactions. Catalyzes the glutathione-dependent reduction of lipid h... more | 3 | Details |
| Microsomal triglyceride transfer protein large subunit | Humans | Catalyzes the transport of triglyceride, cholesteryl ester, and phospholipid between phospholipid surfaces. Required ... more | 8 | Details |
| Microtubule-associated protein 1A | Humans | Structural protein involved in the filamentous cross-bridging between microtubules and other skeletal elements | 3 | Details |
| Microtubule-associated protein 1B | Humans | Facilitates tyrosination of alpha-tubulin in neuronal microtubules. Phosphorylated MAP1B is required for proper micro... more | 2 | Details |
| Microtubule-associated protein 2 | Humans | The exact function of MAP2 is unknown but MAPs may stabilize the microtubules against depolymerization. They also see... more | 2 | Details |