histidine - Definition. Was ist histidine
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Was (wer) ist histidine - definition

CHEMICAL COMPOUND
L-Histidine; Histidine metabolism; Histidines; Histidin; L-histidine; Histadine; 2-Amino-3-(1H-imidazol-4-yl)propanoic acid
  • Conversion of histidine to [[histamine]] by [[histidine decarboxylase]]
  • '''Histidine Biosynthesis Pathway'''
Eight different enzymes can catalyze ten reactions. In this image, His4 catalyzes four different reactions in the pathway.

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
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.

Wikipedia

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.