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| Name | L-Arginine | ||||||||||||||||||||||||||||||||||||||||||
| Accession Number | DB00125 (NUTR00014) | ||||||||||||||||||||||||||||||||||||||||||
| Type | small molecule | ||||||||||||||||||||||||||||||||||||||||||
| Groups | approved, nutraceutical | ||||||||||||||||||||||||||||||||||||||||||
| Description | An essential amino acid that is physiologically active in the L-form. [PubChem] |
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| Structure |
Download: MOL | SDF | SMILES | InChI Display: 2D Structure | 3D Structure |
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| Synonyms |
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| Salts | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Brand names |
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| Brand mixtures | Not Available | ||||||||||||||||||||||||||||||||||||||||||
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| CAS number | 74-79-3 | ||||||||||||||||||||||||||||||||||||||||||
| Weight |
Average: 174.201 Monoisotopic: 174.111675712 |
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| Chemical Formula | C6H14N4O2 | ||||||||||||||||||||||||||||||||||||||||||
| InChI Key | InChIKey=ODKSFYDXXFIFQN-BYPYZUCNSA-N | ||||||||||||||||||||||||||||||||||||||||||
| InChI |
InChI=1S/C6H14N4O2/c7-4(5(11)12)2-1-3-10-6(8)9/h4H,1-3,7H2,(H,11,12)(H4,8,9,10)/t4-/m0/s1
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| IUPAC Name |
(2S)-2-amino-5-carbamimidamidopentanoic acid
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| SMILES |
N[C@@H](CCCNC(N)=N)C(O)=O
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| Mass Spec | show (2.96 KB) | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy | |||||||||||||||||||||||||||||||||||||||||||
| Kingdom | Organic | ||||||||||||||||||||||||||||||||||||||||||
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| Substructures |
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| Pharmacology | |||||||||||||||||||||||||||||||||||||||||||
| Indication | Used for nutritional supplementation, also for treating dietary shortage or imbalance. | ||||||||||||||||||||||||||||||||||||||||||
| Pharmacodynamics | Studies have shown that is has improved immune responses to bacteria, viruses and tumor cells; promotes wound healing and regeneration of the liver; causes the release of growth hormones; considered crucial for optimal muscle growth and tissue repair. | ||||||||||||||||||||||||||||||||||||||||||
| Mechanism of action | Many of supplemental L-arginine's activities, including its possible anti-atherogenic actions, may be accounted for by its role as the precursor to nitric oxide or NO. NO is produced by all tissues of the body and plays very important roles in the cardiovascular system, immune system and nervous system. NO is formed from L-arginine via the enzyme nitric oxide synthase or synthetase (NOS), and the effects of NO are mainly mediated by 3,'5' -cyclic guanylate or cyclic GMP. NO activates the enzyme guanylate cyclase, which catalyzes the synthesis of cyclic GMP from guanosine triphosphate or GTP. Cyclic GMP is converted to guanylic acid via the enzyme cyclic GMP phosphodiesterase. NOS is a heme-containing enzyme with some sequences similar to cytochrome P-450 reductase. Several isoforms of NOS exist, two of which are constitutive and one of which is inducible by immunological stimuli. The constitutive NOS found in the vascular endothelium is designated eNOS and that present in the brain, spinal cord and peripheral nervous system is designated nNOS. The form of NOS induced by immunological or inflammatory stimuli is known as iNOS. iNOS may be expressed constitutively in select tissues such as lung epithelium. All the nitric oxide synthases use NADPH (reduced nicotinamide adenine dinucleotide phosphate) and oxygen (O2) as cosubstrates, as well as the cofactors FAD (flavin adenine dinucleotide), FMN (flavin mononucleotide), tetrahydrobiopterin and heme. Interestingly, ascorbic acid appears to enhance NOS activity by increasing intracellular tetrahydrobiopterin. eNOS and nNOS synthesize NO in response to an increased concentration of calcium ions or in some cases in response to calcium-independent stimuli, such as shear stress. In vitro studies of NOS indicate that the Km of the enzyme for L-arginine is in the micromolar range. The concentration of L-arginine in endothelial cells, as well as in other cells, and in plasma is in the millimolar range. What this means is that, under physiological conditions, NOS is saturated with its L-arginine substrate. In other words, L-arginine would not be expected to be rate-limiting for the enzyme, and it would not appear that supraphysiological levels of L-arginine which could occur with oral supplementation of the amino acid^would make any difference with regard to NO production. The reaction would appear to have reached its maximum level. However, in vivo studies have demonstrated that, under certain conditions, e.g. hypercholesterolemia, supplemental L-arginine could enhance endothelial-dependent vasodilation and NO production. | ||||||||||||||||||||||||||||||||||||||||||
| Absorption | Absorbed from the lumen of the small intestine into the enterocytes. Absorption is efficient and occurs by an active transport mechanism. | ||||||||||||||||||||||||||||||||||||||||||
| Volume of distribution | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Protein binding | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Metabolism | Some metabolism of L-arginine takes place in the enterocytes. L-arginine not metabolized in the enterocytes enters the portal circulation from whence it is transported to the liver, where again some portion of the amino acid is metabolized. | ||||||||||||||||||||||||||||||||||||||||||
| Route of elimination | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Half life | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Clearance | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Toxicity | Oral supplementation with L-arginine at doses up to 15 grams daily are generally well tolerated. The most common adverse reactions of higher doses from 15 to 30 grams daily are nausea, abdominal cramps and diarrhea. Some may experience these symptoms at lower doses. | ||||||||||||||||||||||||||||||||||||||||||
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| Pathways | Not Available | ||||||||||||||||||||||||||||||||||||||||||
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DrugBank does not sell nor buy drugs. Pricing information is supplied for informational
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| Patents | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Properties | |||||||||||||||||||||||||||||||||||||||||||
| State | solid | ||||||||||||||||||||||||||||||||||||||||||
| Experimental Properties |
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| Predicted Properties |
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| Synthesis Reference | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| General Reference |
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| FDA label | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| MSDS | show (72.8 KB) | ||||||||||||||||||||||||||||||||||||||||||
| Interactions | |||||||||||||||||||||||||||||||||||||||||||
| Drug Interactions | Searched, but no interactions found. | ||||||||||||||||||||||||||||||||||||||||||
| Food Interactions | Not Available | ||||||||||||||||||||||||||||||||||||||||||
| Targets |
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1. Nitric-oxide synthase, endothelial Pharmacological action: unknownProduces nitric oxide (NO) which is implicated in vascular smooth muscle relaxation through a cGMP-mediated signal transduction pathway. No mediates vascular endothelial growth factor (VEGF)-induced angiogenesis in coronary vessels and promotes blood clotting through the activation of platelets Organism class: humanUniProt ID: P29474 ![]() Gene: NOS3 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
2. Cationic amino acid transporter 3 Pharmacological action: unknownMediates the uptake of the cationic amino acids arginine, lysine and ornithine in a sodium-independent manner Organism class: humanUniProt ID: Q8WY07 ![]() Gene: SLC7A3 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Decarboxylates L-arginine to agmatine. Truncated splice isoforms probably lack activity Organism class: humanUniProt ID: Q96A70 ![]() Gene: ADC ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Organism class: human UniProt ID: P04424 ![]() Gene: ASL ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
5. Nitric oxide synthase, inducible Pharmacological action: unknownProduces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In macrophages, NO mediates tumoricidal and bactericidal actions Organism class: humanUniProt ID: P35228 ![]() Gene: NOS2A ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
6. High-affinity cationic amino acid transporter 1 Pharmacological action: unknownHigh-affinity, low capacity permease involved in the transport of the cationic amino acids (arginine, lysine and ornithine) in non-hepatic tissues. May also function as an ecotropic retroviral leukemia receptor Organism class: humanUniProt ID: P30825 ![]() Gene: SLC7A1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
May play a role in the regulation of extra-urea cycle arginine metabolism and also in down-regulation of nitric oxide synthesis. Extrahepatic arginase functions to regulate L-arginine bioavailability to NO synthase. Since NO synthase is found in the penile corpus cavernosum smooth muscle, the clitoral corpus cavernosum and the vagina, arginase II plays a role in both male and female sexual arousal. It is therefore a potential target for the treatment of male and female sexual arousal disorders Organism class: humanUniProt ID: P78540 ![]() Gene: ARG2 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
8. Cationic amino acid transporter 4 Pharmacological action: unknownInvolved in the transport of the cationic amino acids (arginine, lysine and ornithine) Organism class: humanUniProt ID: O43246 ![]() Gene: SLC7A4 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Organism class: human UniProt ID: P00966 ![]() Gene: ASS1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
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| Transporters |
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1. Organic cation/carnitine transporter 2 Actions: inhibitorSodium-ion dependent, high affinity carnitine transporter. Involved in the active cellular uptake of carnitine. Transports one sodium ion with one molecule of carnitine. Also transports organic cations such as tetraethylammonium (TEA) without the involvement of sodium. Also Relative uptake activity ratio of carnitine to TEA is 11.3 UniProt ID: O76082![]() Gene: SLC22A5 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
2. Monocarboxylate transporter 10 Actions: inhibitorSodium-independent transporter that mediates the update of aromatic acid. Can function as a net efflux pathway for aromatic amino acids in the basosolateral epithelial cells (By similarity) UniProt ID: Q8TF71![]() Gene: SLC16A10 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
3. Organic cation/carnitine transporter 1 Actions: inhibitorSodium-ion dependent, low affinity carnitine transporter. Probably transports one sodium ion with one molecule of carnitine. Also transports organic cations such as tetraethylammonium (TEA) without the involvement of sodium. Relative uptake activity ratio of carnitine to TEA is 1.78. A key substrate of this transporter seems to be ergothioneine (ET) UniProt ID: Q9H015![]() Gene: SLC22A4 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
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