L-Canavanine

The Uses of L-Canavanine

NO synthase inhibitor

What are the applications of Application

L-Canavanine is a selective inhibitor of NOS2

Definition

ChEBI: A non-proteinogenicL-alpha-amino acid that is L-homoserine substituted at oxygen with a guanidino (carbamimidamido) group. Although structurally related to L-arginine, it is non-proteinoge ic.

Biochem/physiol Actions

Canavanine is a naturally occurring L-amino acid that interferes with L-arginine-utilizing enzymes due to its structural similarity. It is a selective inhibitor of inducible nitric oxide synthase (iNOS). Overproduction of NO by iNOS plays a crucial role in the pathophysiology of septic shock and chronic inflammation.

Purification Methods

Crystallise S-canavanine from absolute EtOH or aqueous EtOH. [Tomiyama J Biol Chem 111 48 1935 gave pK9.25 (COOH), pK 7.4 (guanidinium), pK 11.5 (NH4+), Gulland & Morris J Chem Soc 763 1935,(±) Frankel et al. J Chem Soc 3127 1963, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2622-2628 1961, Beilstein 4 III 1636, 4 IV 3188.]