Kynureninase (L-Kynurenine Hydrolase) (KYNU) Antibody – Rabbit Polyclonal

Kynureninase is a pyridoxal-5'-phosphate (pyridoxal-P) dependent enzyme that catalyzes the cleavage of L-kynurenine and L-3-hydroxykynurenine into anthranilic and 3-hydroxyanthranilic acids, respectively. Kynureninase is involved in the biosynthesis of NAD cofactors from tryptophan through the kynurenine pathway. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2010]

KYNU: Catalyzes the cleavage of L-kynurenine (L-Kyn) and L-3- hydroxykynurenine (L-3OHKyn) into anthranilic acid (AA) and 3- hydroxyanthranilic acid (3-OHAA), respectively. Has a preference for the L-3-hydroxy form. Also has cysteine-conjugate-beta-lyase activity. Xanthurenic aciduria manifesting as massive urinary excretion of large amounts of kynurenine, 3-hydroxykynurenine and xanthurenic acid has been observed in an individual carrying a homozygous missense change in KYNU (PubMed:17334708). The urinary pattern in the patient suggests kynureninase deficiency and a block in the conversion of kynurenine and 3-hydroxykynurenine to anthranilate and 3-hydroxyanthranilate, respectively. Belongs to the kynureninase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 3.7.1.3; Mitochondrial; Amino Acid Metabolism - tryptophan; Hydrolase

Chromosomal Location of Human Ortholog: 2q22.2

Cellular Component: nucleoplasm; mitochondrion; cytoplasm; cytosol

Molecular Function: protein homodimerization activity; kynureninase activity; pyridoxal phosphate binding

Biological Process: anthranilate metabolic process; tryptophan catabolic process to acetyl-CoA; tryptophan catabolic process to kynurenine; quinolinate biosynthetic process; tryptophan catabolic process

Disease: Hydroxykynureninuria