Discovery of Selective and Potent Inhibitors of Gram-Positive Bacterial Thymidylate Kinase (TMK)
摘要:
Thymidylate kinase (TMK) is an essential enzyme in bacterial DNA synthesis. The deoxythymidine monophosphate (dTMP) substrate binding pocket was targeted in rational-design, structure-supported effort, yielding a unique series of antibacterial agents showing a novel, induced-fit binding mode. Lead optimization, aided by X-ray crystallography, led to picomolar inhibitors of both Streptococcus pneumoniae and Staphylococcus aureus TMK. MICs < 1 mu g/mL were achieved against methicillin-resistant S. aureus (MRSA), S. pneumoniae, and vancomycin-resistant. Enterococcus (VRE). Log D adjustments yielded single diastereomers 14 (TK-666) and 46, showing a broad antibacterial spectrum against Gram-positive bacteria and excellent selectivity against the human thymidylate kinase ortholog.
Elaboration of a proprietary thymidylate kinase inhibitor motif towards anti-tuberculosis agents
作者:Lijun Song、Martijn D.P. Risseeuw、Matheus Froeyen、Izet Karalic、Jan Goeman、Davie Cappoen、Johan Van der Eycken、Paul Cos、Hélène Munier-Lehmann、Serge Van Calenbergh
DOI:10.1016/j.bmc.2016.08.041
日期:2016.11
We report the design and synthesis of a series of non-nucleoside MtbTMPK inhibitors (1–14) based on the gram-positive bacterial TMPK inhibitor hit compound 1. A practical synthesis was developed to access these analogues. Several compounds show promising MtbTMPK inhibitory potency and allow the establishment of a structure–activity relationship, which is helpful for further optimization.