Chemistry:Azaserine
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| Formula | C5H7N3O4 |
| Molar mass | 173.128 g·mol−1 |
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Azaserine is a naturally occurring serine derivative diazo compound with antineoplastic and antibiotic properties deriving from its action as a purinergic antagonist and structural similarity to glutamine. Azaserine acts by competitively inhibiting glutamine amidotransferase, a key enzyme responsible for glutamine metabolism.
Mechanism of Action
Azaserine inhibits the rate limiting step of the metabolic hexosamine pathway and irreversibly inhibits γ-glutamyltransferase by acting directly at the substrate-binding pocket. Independent of hexosamine pathway inhibition, azaserine has been demonstrated to protect against hyperglycemic endothelial damage by elevating serum concentrations of manganese-superoxide dismutase, directly reducing the concentration of reactive oxygen species.
Azaserine also downregulates the expression of VCAM-1 and ICAM-1 in response to TNF-α, and research indicates that it may have potential in identifying the L-leucine-favoring system transporter in human T-lymphocytes.
Properties
Azaserine has a solubility of 50 mg/mL in water, a melting point of 146-162 °C, a vapor pressure of 1.53x10−10mmHg at 25 °C, and decomposes before melting.[citation needed]
References
- "Photoinhibition of 2-amino-2-carboxybicyclo[2,2,1]heptane transport by O-diazoacetyl-L-serine. An initial step in identifying the L-system amino acid transporter". The Journal of Biological Chemistry 264 (28): 16399–402. October 1989. doi:10.1016/S0021-9258(19)84720-8. PMID 2789219.
- "Inhibition of glycosaminoglycan synthesis and protein glycosylation with WAS-406 and azaserine result in reduced islet amyloid formation in vitro". American Journal of Physiology. Cell Physiology 293 (5): C1586–93. November 2007. doi:10.1152/ajpcell.00208.2007. PMID 17804609.
- "Crystal structures of Escherichia coli gamma-glutamyltranspeptidase in complex with azaserine and acivicin: novel mechanistic implication for inhibition by glutamine antagonists". Journal of Molecular Biology 380 (2): 361–72. July 2008. doi:10.1016/j.jmb.2008.05.007. PMID 18555071.
- "The hexosamine biosynthesis inhibitor azaserine prevents endothelial inflammation and dysfunction under hyperglycemic condition through antioxidant effects". American Journal of Physiology. Heart and Circulatory Physiology 296 (3): H815–22. March 2009. doi:10.1152/ajpheart.00756.2008. PMID 19136606. http://doc.rero.ch/record/12007/files/yang_hbi.pdf.
- "6-diazo-5-oxo-L-norleucine and azaserine as affinity inhibitors of glutamin(asparagin)ase". Biochemistry International 12 (3): 413–20. March 1986. PMID 3707592.
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