Download Mendeley7-Substituted pterins provide a new direction for ricin A chain inhibitors.
Pruet, J.M., Jasheway, K.R., Manzano, L.A., Bai, Y., Anslyn, E.V., Robertus, J.D.(2011) Eur J Med Chem 46: 3608-3615
- PubMed: 21641093
- DOI: https://doi.org/10.1016/j.ejmech.2011.05.025
- Primary Citation of Related Structures:
3PX8, 3PX9 - PubMed Abstract:
Ricin is a potent toxin found in castor seeds. The A chain, RTA, enzymaticlly depurinates a specific adenosine in ribosomal RNA, inhibiting protein synthesis. Ricin is a known chemical weapons threat having no effective antidote. This makes the discovery of new inhibitors of great importance. We have previously used 6-substituted pterins, such as pteroic acid, as an inhibitor platform with moderate success. We now report the success of 7-carboxy pterin (7CP) as an RTA inhibitor; its binding has been monitored using both kinetic and temperature shift assays and by X-ray crystallography. We also discuss the synthesis of various derivatives of 7CP, and their binding affinity and inhibitory effects, as part of a program to make effective RTA inhibitors.
Organizational Affiliation:
Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A1590, Austin, TX 78712, USA.
