Histidine decarboxylase: Information from Answers.com

histidine decarboxylase
Identifiers
Symbol	HDC
Entrez	3067
HUGO	4855
OMIM	142704
RefSeq	NM_002112
UniProt	P19113
Other data
EC number	4.1.1.22
Locus	Chr. 15 q21-q22

Histidine decarboxylase (HDC) is the enzyme that catalyzes the reaction that produces histamine from histidine with the help of vitamin B6 as follows:

C₆H₉N₃O₂ → C₅H₉N₃ + CO₂

Conversion of histidine to histamine by histidine decarboxylase

External links

MeSH Histidine+Decarboxylase

This lyase article is a stub. You can help Wikipedia by expanding it.

v • d • e Carbon-carbon lyases (EC 4.1)

4.1.1: Carboxy-lyases	Pyruvate decarboxylase · Oxaloacetate decarboxylase · Acetoacetate decarboxylase · Malonyl-CoA decarboxylase · Glutamate decarboxylase · Ornithine decarboxylase · Lysine decarboxylase · Phosphoribosylaminoimidazole carboxylase · Histidine decarboxylase · Uridine monophosphate synthetase/Orotidine 5'-phosphate decarboxylase · Aromatic L-amino acid decarboxylase · Phosphoenolpyruvate carboxylase · Pyrophosphomevalonate decarboxylase · Uroporphyrinogen III decarboxylase · RuBisCO · Phosphoenolpyruvate carboxykinase · Adenosylmethionine decarboxylase

4.1.2: Aldehyde-lyases	Aldolase (Aldolase A, Aldolase B, Aldolase C) · 2-hydroxyphytanoyl-CoA lyase · Threonine aldolase

4.1.3: Oxo-acid-lyases	3-hydroxy-3-methylglutaryl-CoA lyase

4.1.99: Other	Tryptophanase

Metabolism: amino acid metabolism - neurotransmitter enzymes

monoamine

histidine→histamine	anabolism: Histidine decarboxylase catabolism: Histamine N-methyltransferase - Amine oxidase

tyrosine→dopamine→epinephrine	anabolism: Tyrosine hydroxylase - Aromatic L-amino acid decarboxylase - Dopamine beta hydroxylase - Phenylethanolamine N-methyltransferase catabolism: Catechol-O-methyl transferase - Monoamine oxidase

glutamate→GABA	anabolism: Glutamate decarboxylase catabolism: 4-aminobutyrate aminotransferase - 4-aminobutyrate transaminase

tryptophan→serotonin→melatonin	Tryptophan hydroxylase - Aromatic L-amino acid decarboxylase - Acetylserotonin O-methyltransferase

arginine→NO

Nitric oxide synthase (NOS1, NOS2A, NOS3)

choline→Acetylcholine

anabolism: Choline acetyltransferase
catabolism: Cholinesterase (Acetylcholinesterase, Butyrylcholinesterase)

see also intermediates

Histaminergics

Receptor
Ligands

H₁	Agonists: 2-Pyridylethylamine • Betahistine • Histamine • HTMT • UR-AK49 Antagonists: 1st Generation: Alimemazine • Azatadine • Bamipine • Bepotastine • Bromazine • Brompheniramine • Buclizine • Carbinoxamine • Chlorcyclizine • Chloropyramine • Chlorothen • Chlorpheniramine • Chlorphenoxamine • Cinnarizine • Clemastine • Clobenzepam • Clocinizine • Cyclizine • Cyproheptadine • Dacemazine • Deptropine • Dexbrompheniramine • Dexchlorpheniramine • Dimetindene • Diphenhydramine • Diphenylpyraline • Doxylamine • Embramine • Etymemazine • Histapyrrodine • Hydroxyethylpromethazine • Hydroxyzine • Iproheptine • Isopromethazine • Isothipendyl • Meclizine • Mepyramine • Mequitazine • Methafurylene • Methapyrilene • Methdilazine • Moxastine • Niaprazine • Orphenadrine • Oxatomide • Oxomemazine • p-Methyldiphenhydramine • Pheniramine • Phenyltoloxamine • Promethazine • Pyrilamine • Pyrrobutamine • Setastine • Talastine • Thenalidine • Thenyldiamine • Thiazinamium • Thonzylamine • Tolpropamine • Tripelennamine • Triprolidine; 2nd Generation: Acrivastine • Antazoline • Astemizole • Azatadine • Azelastine • Bamipine • Cetirizine • Clemizole • Clobenztropine • Deptropine • Dimebon • Ebastine • Emedastine • Epinastine • Ketotifen • Levocabastine • Loratadine • Mebhydrolin • Mizolastine • Olopatadine • Phenindamine • Pimethixene • Pyrrobutamine • Rupatadine • Terfenadine • Thenalidine • Tritoqualine; 3rd Generation: Desloratadine • Fexofenadine • Levocetirizine; Miscellaneous: Tricyclic Antidepressants (Amitriptyline, Doxepin, Trimipramine, etc) • Tetracyclic Antidepressants (Mianserin, Mirtazapine, etc) • Serotonin Antagonists and Reuptake Inhibitors (Trazodone, Nefazodone) • Typical Antipsychotics (Chlorpromazine, Thioridazine, etc) • Atypical Antipsychotics (Clozapine, Olanzapine, Quetiapine, etc)

H₂	Agonists: Amthamine • Betazole • Dimaprit • Histamine • HTMT • Impromidine • UR-AK49 Antagonists: Cimetidine • Famotidine • Lafutidine • Metiamide • Niperotidine • Nizatidine • Ranitidine • Roxatidine

H₃	Agonists: α-Methylhistamine • Cipralisant • Histamine • Imetit • Immepip • Immethridine • Methimepip • Proxyfan Antagonists: A-349,821 • A-423,579 • ABT-239 • Betahistine • Burimamide • Ciproxifan • Clobenpropit • Conessine • GSK-189,254 • Impentamine • Iodophenpropit • JNJ-5,207,852 • MK-0249 • NNC-38-1,049 • SCH-79,687 • Thioperamide • Tiprolisant • VUF-5,681

H₄	Agonists: 4-Methylhistamine • Histamine • VUF-8,430 Antagonists: JNJ-7,777,120 • Thioperamide • VUF-6,002

Reuptake
Inhibitors

Plasmalemmal

.....

Vesicular

VMAT Inhibitors

Ibogaine • Reserpine • Tetrabenazine

Enzyme
Inhibitors

Anabolism

HDC Inhibitors

α-FMH • Brocresine • Catechin • Cyanidanol-3 • McN-A-1293 • ME • Meciadanol • Naringenin • Thiazol-4-yimethoxyamine • Tritoqualine • Zy-15,029

Catabolism

HNMT Inhibitors	Amodiaquine • BW-301U • Diphenhydramine • Harmaline • Metoprine • Quinacrine • SKF-91,488 • Tacrine

DAO Inhibitors	1,4-Diamino-2-butyne • Aminoguanidine

Others

Precursors	L-Histidine

Cofactors	Vitamin B6 (Pyridoxine, Pyridoxamine, Pyridoxal → Pyridoxal Phosphate)

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Donate to Wikimedia

	Is histidine a pyrimidine?
	Is pseudomonas decarboxylase positive?
	Where is glutamate decarboxylase found?