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Record Information
Created at2005-11-16 15:48:42 UTC
Updated at2021-10-07 20:38:36 UTC
NP-MRD IDNP0001101
Secondary Accession NumbersNone
Natural Product Identification
Common NameL-Histidine
DescriptionHistidine (His), also known as L-histidine, is an alpha-amino acid. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon). Amino acids are organic compounds that contain amino (–NH2) and carboxyl (–COOH) functional groups, along with a side chain (R group) specific to each amino acid. Histidine is one of 20 proteinogenic amino acids, i.E., The amino acids used in the biosynthesis of proteins. Histidine is found in all organisms ranging from bacteria to plants to animals. It is classified as an aliphatic, positively charged or basic amino acid. Histidine is a unique amino acid with an imidazole functional group. The acid-base properties of the imidazole side chain are relevant to the catalytic mechanism of many enzymes such as proteases. In catalytic triads, the basic nitrogen of histidine abstracts a proton from serine, threonine, or cysteine to activate it as a nucleophile. In a histidine proton shuttle, histidine is used to quickly shuttle protons. It can do this by abstracting a proton with its basic nitrogen to make a positively charged intermediate and then use another molecule to extract the proton from its acidic nitrogen. Histidine forms complexes with many metal ions. The imidazole sidechain of the histidine residue commonly serves as a ligand in metalloproteins. Histidine was first isolated by German physician Albrecht Kossel in 1896. Histidine is an essential amino acid in humans and other mammals. It was initially thought that it was only essential for infants, but longer-term studies established that it is also essential for adults. Infants four to six months old require 33 mg/kg of histidine. It is not clear how adults make small amounts of histidine, and dietary sources probably account for most of the histidine in the body. Histidine is a precursor for histamine and carnosine biosynthesis. Inborn errors of histidine metabolism, including histidinemia, maple syrup urine disease, propionic acidemia, and tyrosinemia I, exist and are marked by increased histidine levels in the blood. Elevated blood histidine is accompanied by a wide range of symptoms, from mental and physical retardation to poor intellectual functioning, emotional instability, tremor, ataxia and psychosis. Histidine and other imidazole compounds have anti-oxidant, anti-inflammatory and anti-secretory properties (PMID: 9605177 ). The efficacy of L-histidine in protecting inflamed tissue is attributed to the capacity of the imidazole ring to scavenge reactive oxygen species (ROS) generated by cells during acute inflammatory response (PMID: 9605177 ). Histidine, when administered in therapeutic quantities is able to inhibit cytokines and growth factors involved in cell and tissue damage (US patent 6150392). Histidine in medical therapies has its most promising trials in rheumatoid arthritis where up to 4.5 G daily have been used effectively in severely affected patients. Arthritis patients have been found to have low serum histidine levels, apparently because of very rapid removal of histidine from their blood (PMID: 1079527 ). Other patients besides arthritis patients that have been found to be low in serum histidine are those with chronic renal failure. Urinary levels of histidine are reduced in pediatric patients with pneumonia (PMID: 2084459 ). Asthma patients exhibit increased serum levels of histidine over normal controls (PMID: 23517038 ). Serum histidine levels are lower and are negatively associated with inflammation and oxidative stress in obese women (PMID: 23361591 ). Histidine supplementation has been shown to reduce insulin resistance, reduce BMI and fat mass and suppress inflammation and oxidative stress in obese women with metabolic syndrome. Histidine appears to suppress pro-inflammatory cytokine expression, possibly via the NF-κB pathway, in adipocytes (PMID: 23361591 ). Low plasma concentrations of histidine are associated with protein-energy wasting, inflammation, oxidative stress, and greater mortality in chronic kidney disease patients (PMID: 18541578 ). Histidine may have many other possible functions because it is the precursor of the ubiquitous neurohormone-neurotransmitter histamine. Histidine increases histamine in the blood and probably in the brain. Low blood histamine with low serum histidine occurs in rheumatoid arthritis patients. Low blood histamine also occurs in some manic, schizophrenic, high copper and hyperactive groups of psychiatric patients. Histidine is a useful therapy in all patients with low histamine levels (http://Www.Dcnutrition.Com).
(S)-alpha-Amino-1H-imidazole-4-propanoic acidChEBI
(S)-alpha-Amino-1H-imidazole-4-propionic acidChEBI
(S)-a-Amino-1H-imidazole-4-propanoic acidGenerator
(S)-Α-amino-1H-imidazole-4-propanoic acidGenerator
(S)-a-Amino-1H-imidazole-4-propionic acidGenerator
(S)-Α-amino-1H-imidazole-4-propionic acidGenerator
Amino-1H-imidazole-4-propanoic acidHMDB
Amino-4-imidazoleproprionic acidHMDB
Histidine, L isomerHMDB
Histidine, L-isomerHMDB
L-Isomer histidineHMDB
Chemical FormulaC6H9N3O2
Average Mass155.1546 Da
Monoisotopic Mass155.06948 Da
IUPAC Name(2S)-2-amino-3-(1H-imidazol-5-yl)propanoic acid
Traditional NameL-histidine
CAS Registry Number71-00-1
InChI Identifier
Spectrum TypeDescriptionDepositor IDDeposition DateView
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Wishart Lab2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 400 MHz, H2O, simulated)Varshavi.d262021-07-25View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, simulated)Varshavi.d262021-07-25View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, simulated)Varshavi.d262021-09-05View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, experimental)Varshavi.d262021-09-05View Spectrum
Species of Origin
Species NameSourceReference
Arabidopsis thalianaKNApSAcK Database
Carica papayaKNApSAcK Database
Mangifera indicaKNApSAcK Database
Trifolium pratense L.KNApSAcK Database
Trifolium repens L.KNApSAcK Database
Trigonella foenum-graecumKNApSAcK Database
Species Where Detected
Species NameSourceReference
Escherichia coliKNApSAcK Database
Homo sapiens (Serum)KNApSAcK Database
Homo sapiens (Urine)KNApSAcK Database
Chemical Taxonomy
Description Belongs to the class of organic compounds known as histidine and derivatives. Histidine and derivatives are compounds containing cysteine or a derivative thereof resulting from reaction of cysteine at the amino group or the carboxy group, or from the replacement of any hydrogen of glycine by a heteroatom.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassAmino acids, peptides, and analogues
Direct ParentHistidine and derivatives
Alternative Parents
  • Histidine or derivatives
  • Alpha-amino acid
  • L-alpha-amino acid
  • Imidazolyl carboxylic acid derivative
  • Aralkylamine
  • Azole
  • Imidazole
  • Heteroaromatic compound
  • Amino acid
  • Carboxylic acid
  • Azacycle
  • Organoheterocyclic compound
  • Monocarboxylic acid or derivatives
  • Organic nitrogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Primary amine
  • Primary aliphatic amine
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Carbonyl group
  • Organic oxygen compound
  • Amine
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors
Physical Properties
Experimental Properties
Melting Point287 °CNot Available
Boiling Point458.87 °C. @ 760.00 mm Hg (est)The Good Scents Company Information System
Water Solubility45.6 mg/mLNot Available
LogP-3.32Chmelík, J., Hudecek, J., Putyera, K., Makovicka, J., Kalous, V., & Chmelíková, J. (1991). Characterization of the hydrophobic properties of amino acids on the basis of their partition and distribution coefficients in the 1-octanol-water system. Collection of Czechoslovak chemical communications, 56(10), 2030-2041.
Predicted Properties
Water Solubility71.3 g/LALOGPS
pKa (Strongest Acidic)1.85ChemAxon
pKa (Strongest Basic)9.44ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area92 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity38.06 m³·mol⁻¹ChemAxon
Polarizability14.67 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
DrugBank IDDB00117
Phenol Explorer Compound IDNot Available
FoodDB IDFDB011856
KNApSAcK IDC00001363
Chemspider ID6038
KEGG Compound IDC00135
BiGG ID33985
Wikipedia LinkL-histidine
PubChem Compound6274
PDB IDNot Available
ChEBI ID15971
Good Scents IDrw1037461
General References
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  25. Effective method for the amelioration and prevention of tissue and cellular damage [Link]