Human malaria parasite cold shock protein plays an essential role in asexual and sexual stage development and presents an excellent druggable target
Behl, A.; Saini, M.; Leon, F. D.; Kumari, G.; Kumar, V.; Shoaib, R.; Singh, H.; Garg, S.; Arenz, C.; singh, s.
Show abstract
Cold shock proteins are well characterized in bacteria, plants and humans, however there is no information on their existence and role in malaria parasite. Here, we have delineated the function of a novel cold shock protein of Plasmodium falciparum (Pf) which we have annotated PfCoSP. Our results show that recombinant PfCoSP has both DNA and RNA binding activity, and also interacts with alpha and beta tubulin of Pf. PfCoSP binds with RNA and alpha tubulin simultaneously to form a complex. Expression of PfCoSP was found during asexual blood stages and gametocyte stages of malaria parasite. PfCoSP expression up-regulates many folds upon cold treatment, suggesting its role during hypothermic cold shock. Interestingly, PfCoSP showed binding with human cold shock protein LIN28A inhibitor LI71 that also inhibits PfCSP -alpha/beta tubulin interactions. LI71 showed antimalarial activity against asexual blood stage and gametocyte stage suggesting its multi-stage, transmission-blocking potential. We propose that PfCoSP may form a workbench for translation during cold stress via its interactions with target mRNAs and the cytoskeleton protein tubulin.
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