EOG8FN6Z8 GO:0030170 38/119 pyridoxal phosphate binding molecular_function "Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6." [GOC:mah, ISBN:0198506732] EOG8FN6Z8 GO:0003824 31/119 catalytic activity molecular_function "Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic." [ISBN:0198506732] EOG8FN6Z8 GO:0016829 4/119 lyase activity molecular_function "Catalysis of the cleavage of C-C, C-O, C-N and other bonds by other means than by hydrolysis or oxidation, or conversely adding a group to a double bond. They differ from other enzymes in that two substrates are involved in one reaction direction, but only one in the other direction. When acting on the single substrate, a molecule is eliminated and this generates either a new double bond or a new ring." [EC:4.-.-.-, ISBN:0198547684] EOG8FN6Z8 GO:0004123 3/119 cystathionine gamma-lyase activity molecular_function "Catalysis of the reaction: L-cystathionine + H2O = 2-oxobutanoate + L-cysteine + NH4+." [RHEA:24918] EOG8FN6Z8 GO:0080146 2/119 L-cysteine desulfhydrase activity molecular_function "Catalysis of the reaction: L-cysteine + H2O = ammonia + pyruvate + hydrogen sulfide + H+." [MetaCyc:LCYSDESULF-RXN, PMID:19955263] EOG8FN6Z8 GO:0044540 2/119 L-cystine L-cysteine-lyase (deaminating) molecular_function "Catalysis of the reaction: L-cystine + H2O <=> pyruvate + NH3 + thiocysteine. Thiocysteine is also known as cysteine persulfide." [GOC:jl, RHEA:24930] EOG8FN6Z8 GO:0000096 1/119 sulfur amino acid metabolic process biological_process "The chemical reactions and pathways involving amino acids containing sulfur, comprising cysteine, homocysteine, methionine and selenocysteine." [GOC:ai] EOG8FN6Z8 GO:0006750 1/119 glutathione biosynthetic process biological_process "The chemical reactions and pathways resulting in the formation of glutathione, the tripeptide glutamylcysteinylglycine, which acts as a coenzyme for some enzymes and as an antioxidant in the protection of sulfhydryl groups in enzymes and other proteins." [CHEBI:16856, GOC:ai, GOC:al, GOC:pde, ISBN:0198506732]