Cross talk between Leishmania donovani CpG DNA and Toll-like receptor 9: an immunoinformatics approach

Biochemical and Biophysical Research Communications
Chhedi Lal GuptaPreeti Bajpai

Abstract

The precise and potential contribution of Toll-like receptors (TLRs) signaling pathways in fighting parasitic infections of Leishmania spp., an intracellular protozoan parasite, has gained significant attention during the last decades. Although it is well established that TLR9 recognizes CpG motifs in microbial genomes, the specificity of the CpG DNA pattern of Leishmania parasite interacting with endosomal TLR9 is still unknown. Hence in our study to identify the CpG DNA pattern of Leishmania donovani acting as ligand for TLR9, consecutive homology searches were performed using known CpG ODN 2216 as initial template until a consistent CpG pattern in L. donovani was found. A reliable model of TLR9 ectodomains (ECDs) as well as CpG DNA patterns was predicted to develop the 3D structural complexes of TLR9 ECD-CpG DNA utilizing molecular modeling and docking approaches. The results revealed the preferential specificity of L. donovani CpG DNA to TLR9 compared to control ODN and other CpG patterns. The interface between TLR9 and L. donovani CpG DNA was also found to be geometrically complementary with the LRR11 region of TLR9, acting as the critical region for ligand recognition. The L. donovani CpG pattern identified can be employe...Continue Reading

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Citations

Aug 9, 2019·Parasitology·Marco Antonio Barajas-MendiolaPatricia Cuéllar-Mata
Mar 28, 2020·Drug Development Research·Rohit Kumar TiwariPreeti Bajpai
Dec 26, 2016·Immunogenetics·Haiying JiangJinping Chen
Feb 26, 2019·PLoS Neglected Tropical Diseases·Juliana Elena Silveira PrattiHerbert Leonel de Matos Guedes
Nov 30, 2020·International Immunopharmacology·Rohit Kumar TiwariPreeti Bajpai

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