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- W4386056178 abstract "Lumican is an extracellular matrix proteoglycan, known to regulate toll-like receptor (TLR) signaling in innate immune cells. In experimental settings, lumican suppresses TLR9 signaling by binding to, and sequestering its synthetic ligand, CpG-DNA, in non-signal permissive endosomes. However, the molecular details of lumican interactions with CpG-DNA are obscure. Here, the 3-D structure of the 22 base-long CpG-DNA (CpG ODN_2395) bound to lumican or TLR9 were modeled using homology modeling and docking methods. Some of the TLR9-CpG ODN_2395 features predicted by our model are consistent with the previously reported TLR9-CpG DNA crystal structure, substantiating our current analysis. Our modeling indicated a smaller buried surface area for lumican-CpG ODN_2395 (1803 A 2 ) compared to that of TLR9-CpG ODN_2395 (2094 A 2 ), implying a potentially lower binding strength for lumican and CpG-DNA than TLR9 and CpG-DNA. The docking analysis identified 32 amino acids in lumican LRR1-11 interacting with CpG ODN_2395, primarily through hydrogen bonding, salt-bridges and hydrophobic interactions. Our study provides molecular insights into lumican and CpG-DNA interactions that may lead to molecular targets for modulating TLR9 mediated inflammation and autoimmunity." @default.
- W4386056178 created "2023-08-23" @default.
- W4386056178 creator A5046889994 @default.
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- W4386056178 date "2023-08-22" @default.
- W4386056178 modified "2023-10-10" @default.
- W4386056178 title "3D modeling of CpG DNA binding with matrix lumican shows leucine-rich repeat motif involvement as in TLR9- CpG DNA interactions" @default.
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- W4386056178 doi "https://doi.org/10.1101/2023.08.21.554201" @default.
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