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Qu'est-ce (qui) est histidine - définition

CHEMICAL COMPOUND

L-Histidine; Histidine metabolism; Histidines; Histidin; L-histidine; Histadine; 2-Amino-3-(1H-imidazol-4-yl)propanoic acid

histidine

['h?st?di:n]

¦ noun Biochemistry an amino acid which is a constituent of most proteins and is essential in the human diet.

Origin

C19: from Gk histos 'web, tissue' + -ide + -ine⁴.

Protein-histidine N-methyltransferase

CLASS OF ENZYMES

EC 2.1.1.85; S-adenozil-L-metionin:protein-L-histidine N-tele-methyltransferase

In enzymology, a protein-histidine N-methyltransferase () is an enzyme that catalyzes the chemical reaction

https://en.wikipedia.org/wiki/Protein-histidine_N-methyltransferase

Histidine ammonia-lyase

PROTEIN-CODING GENE IN THE SPECIES HOMO SAPIENS

Histidase; Histidine ammonialyase; HSTD; HAL (gene); EC 4.3.1.3; L-histidine ammonia-lyase (urocanate-forming)

Histidine ammonia-lyase (or histidase, or histidinase) is an enzyme that in humans is encoded by the HAL gene. Histidase converts histidine into ammonia and urocanic acid.

https://en.wikipedia.org/wiki/Histidine_ammonia-lyase

Wikipédia

Histidine

Histidine (symbol His or H) is an essential amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated –NH₃⁺ form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO⁻ form under biological conditions), and an imidazole side chain (which is partially protonated), classifying it as a positively charged amino acid at physiological pH. Initially thought essential only for infants, it has now been shown in longer-term studies to be essential for adults also. It is encoded by the codons CAU and CAC.

Histidine was first isolated by Albrecht Kossel and Sven Gustaf Hedin in 1896. It is also a precursor to histamine, a vital inflammatory agent in immune responses. The acyl radical is histidyl.

https://en.wikipedia.org/wiki/Histidine