In the course of our study on fungal purine transporters, a number of new 3-deazapurine analogues have been rationally designed, based on the interaction of purine substrates with the Aspergillus nidulans FcyB carrier, and synthesized following an effective synthetic procedure. Certain derivatives have been found to specifically inhibit FcyB-mediated [3H]-adenine uptake. Molecular simulations have
nucleobase transporter FcyB, through binding in its major substrate binding site, by specifically interacting with Asn163. Here, in an effort to further understand the molecular details of structure-activityrelationships in all three major nucleobase transporters of fungi, we extend this study by designing, based on our previous experience, synthesizing and testing further 3-deazapurine analogues. We thus