Download Mendeley"Seriously Sweet": Acesulfame K Exhibits Selective Inhibition Using Alternative Binding Modes in Carbonic Anhydrase Isoforms.
Murray, A.B., Lomelino, C.L., Supuran, C.T., McKenna, R.(2018) J Med Chem 61: 1176-1181
- PubMed: 29266943
- DOI: https://doi.org/10.1021/acs.jmedchem.7b01470
- Primary Citation of Related Structures:
5WG7, 5WGP - PubMed Abstract:
Human carbonic anhydrase IX (CA IX) is upregulated in neoplastic tissues; as such, it is studied as a drug target for anticancer chemotherapy. Inhibition of CA IX has been shown to be therapeutically favorable in terms of reducing tumor growth. Previously, saccharin, a commonly used artificial sweetener, has been observed to selectively inhibit CA IX over other CA isoforms. In this study, X-ray crystallography showed acesulfame potassium (Ace K) binding directly to the catalytic zinc in CA IX (mimic) and through a bridging water in CA II. This modulation in binding is reflected in the binding constants, with Ace K inhibiting CA IX but not other CA isoforms. Hence, this study establishes the potential of Ace K (an FDA approved food additive) as a lead compound in the design and development of CA IX specific inhibitors.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida , Gainesville, Florida 32610, United States.
