ILE is found in 109216 entries

ILE in polymers: 109195 entries. Examples include: 101M, 102L, 102M

ILE as free ligands, exist in 21 entries. Examples include 1DGI, 1H74, 1Z17

Find related ligands: Stereoisomers Similar ligands Chemical Structure Search

View summary at Ligand Expo

Chemical Component Summary

Identifiers L-isoleucine
(2S,3S)-2-amino-3-methyl-pentanoic acid
Formula C6 H13 N O2
Molecular Weight 131.17 g/mol
Type L-peptide linking
Isomeric SMILES CC[C@H](C)[C@H](N)C(O)=O
InChI InChI=1S/C6H13NO2/c1-3-4(2)5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/t4-,5-/m0/s1

Chemical Details

Formal Charge 0
Atom Count 22
Chiral Atom Count 2
Chiral Atoms CA CB
Bond Count 21
Aromatic Bond Count 0
Leaving Atoms OXT H2 HXT

Drug Info: DrugBank

DrugBank ID DB00167   (Stereoisomeric match)
Name L-Isoleucine
  • approved
  • nutraceutical
Description An essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of leucine. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels. [PubChem]
  • (2S,3S)-2-Amino-3-methylpentanoic acid
  • 2-Amino-3-methylvaleric acid
  • alpha-amino-beta-methylvaleric acid
  • I
  • Ile
  • Isoleucine
  • L-Isoleucine
  • α-amino-β-methylvaleric acid
Brand Names
  • Aminosyn 10%
  • Aminosyn 5%
  • Aminosyn 7%
  • Aminosyn 8.5%
  • Bcaa 4% Inj
  • Travasol
  • Vamin 18 Electrolyte-free
Affected Organism Humans and other mammals
Indication The branched-chain amino acids may have antihepatic encephalopathy activity in some. They may also have anticatabolic and antitardive dyskinesia activity.
Pharmacology They provide ingredients for the manufacturing of other essential biochemical components in the body, some of which are utilized for the production of energy, stimulants to the upper brain and helping you to be more alert.
Mechanism of action (Applies to Valine, Leucine and Isoleucine)
This group of essential amino acids are identified as the branched-chain amino acids, BCAAs. Because this arrangement of carbon atoms cannot be made by humans, these amino acids are an essential element in the diet. The catabolism of all three compounds initiates in muscle and yields NADH and FADH2 which can be utilized for ATP generation. The catabolism of all three of these amino acids uses the same enzymes in the first two steps. The first step in each case is a transamination using a single BCAA aminotransferase, with a-ketoglutarate as amine acceptor. As a result, three different a-keto acids are produced and are oxidized using a common branched-chain a-keto acid dehydrogenase, yielding the three different CoA derivatives. Subsequently the metabolic pathways diverge, producing many intermediates.
The principal product from valine is propionylCoA, the glucogenic precursor of succinyl-CoA. Isoleucine catabolism terminates with production of acetylCoA and propionylCoA; thus isoleucine is both glucogenic and ketogenic. Leucine gives rise to acetylCoA and acetoacetylCoA, and is thus classified as strictly ketogenic.
There are a number of genetic diseases associated with faulty catabolism of the BCAAs. The most common defect is in the branched-chain a-keto acid dehydrogenase. Since there is only one dehydrogenase enzyme for all three amino acids, all three a-keto acids accumulate and are excreted in the urine. The disease is known as Maple syrup urine disease because of the characteristic odor of the urine in afflicted individuals. Mental retardation in these cases is extensive. Unfortunately, since these are essential amino acids, they cannot be heavily restricted in the diet; ultimately, the life of afflicted individuals is short and development is abnormal The main neurological problems are due to poor formation of myelin in the CNS.
Route of administration intravenous
  • Dietary Supplements
  • Micronutrients
  • Amino Acids, Essential
  • Supplements
CAS number 73-32-5
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID: 21059682