A second binding site for double-stranded RNA in TLR3 and consequences for interferon activation
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Updated: Jul 4, 2026

A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3
Published on: January 24, 2016
Nina Pirher1, Karolina Ivicak, Jelka Pohar
1Department of Biotechnology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia.
Abstract:
We show that substrate specificity of Toll-like receptor 3 (TLR3) is due to the presence of two binding sites in the ectodomain, separated by 50 A. This corresponds to two turns of a double-stranded RNA duplex, allowing differentiation between nucleic acids in the A- or B-type conformation. We propose that there are different arrangements of TLR3 ectodomains along the double-stranded RNA that could modulate the strength of the interferon response.
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