4. Conclusion In the present study B.malayi gene encoding thymidylate kinase was successfully cloned, expressed and characterized. rBmTMK, a dimeric protein, showed low sequence homology with its human host and can be categorized into TypeI TMK on the basis of active site arginine residue. Results of substrate specificity showed thatit can utilize only pyrimidine nucleosides as phosphate acceptor.Pyrimidine based nucleoside analogues showed selective inhibition of the rBmTMK, furthermore these results were also supported by docking studies. Significant differences in the kinetic properties and the dTMP binding pocket of BmTMK as compared to HsTMK may be exploited in parasite specific drug designing