molecular function |
| GO:0008898 | | S-adenosylmethionine-homocysteine S-methyltransferase activity | | Catalysis of the reaction: S-adenosyl-L-methionine + L-homocysteine = S-adenosyl-L-homocysteine + L-methionine. |
| GO:0047150 | | betaine-homocysteine S-methyltransferase activity | | Catalysis of the reaction: L-homocysteine + betaine = N,N-dimethylglycine + L-methionine. |
| GO:0046872 | | metal ion binding | | Interacting selectively and non-covalently with any metal ion. |
| GO:0008168 | | methyltransferase activity | | Catalysis of the transfer of a methyl group to an acceptor molecule. |
| GO:0016740 | | transferase activity | | Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2. |
| GO:0008270 | | zinc ion binding | | Interacting selectively and non-covalently with zinc (Zn) ions. |
biological process |
| GO:0071267 | | L-methionine salvage | | Any process that generates L-methionine from derivatives of it, without de novo synthesis. |
| GO:0046500 | | S-adenosylmethionine metabolic process | | The chemical reactions and pathways involving S-adenosylmethionine, S-(5'-adenosyl)-L-methionine, an important intermediate in one-carbon metabolism. |
| GO:0006579 | | amino-acid betaine catabolic process | | The chemical reactions and pathways resulting in the breakdown of any betaine, the N-trimethyl derivative of an amino acid. |
| GO:0006577 | | amino-acid betaine metabolic process | | The chemical reactions and pathways involving any betaine, the N-trimethyl derivative of an amino acid. |
| GO:0042426 | | choline catabolic process | | The chemical reactions and pathways resulting in the breakdown of choline (2-hydroxyethyltrimethylammonium), an amino alcohol that occurs widely in living organisms as a constituent of certain types of phospholipids and in the neurotransmitter acetylcholine. |
| GO:0009086 | | methionine biosynthetic process | | The chemical reactions and pathways resulting in the formation of methionine (2-amino-4-(methylthio)butanoic acid), a sulfur-containing, essential amino acid found in peptide linkage in proteins. |
| GO:0032259 | | methylation | | The process in which a methyl group is covalently attached to a molecule. |
| GO:0006479 | | protein methylation | | The addition of a methyl group to a protein amino acid. A methyl group is derived from methane by the removal of a hydrogen atom. |
| GO:0050666 | | regulation of homocysteine metabolic process | | Any process that modulates the frequency, rate or extent of the chemical reactions and pathways involving homocysteine, the amino acid alpha-amino-gamma-mercaptobutanoic acid. |
| GO:0000096 | | sulfur amino acid metabolic process | | The chemical reactions and pathways involving amino acids containing sulfur, comprising cysteine, homocysteine, methionine and selenocysteine. |
cellular component |
| GO:0005737 | | cytoplasm | | All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. |
| GO:0005829 | | cytosol | | The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes. |
| GO:0070062 | | extracellular exosome | | A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm. |