Site-specific effect of polar functional group-modification in lipids of TLR2 ligands for modulating the ligand immunostimulatory activity.

Abstract:

:Toll-like receptor 2 (TLR2), a member of the TLR innate immune receptor family, recognizes lipoproteins from bacteria and modulates the immune response by inducing the expression of various cytokines. TLR2 has a large hydrophobic pocket that recognizes long fatty acyl groups on TLR2 ligands. However, few studies have focused on the property of the hydrophobic TLR2 pocket. Based on the X-ray crystal structure of TLR2, small polar regions were found in the hydrophobic TLR2 pocket. Interactions between the polar residues and ligands were explored here by designing and synthesizing a Pam2CSK4 derivative of the TLR2 ligands, containing an amide group within the lipid moiety. We evaluated the binding affinities and immunomodulatory activities of these ligands. Results suggested that the amide groups in the lipid chain interacted with the polar residues in the hydrophobic lipid-binding pocket of TLR2.

journal_name

Bioorg Med Chem Lett

authors

Arai Y,Inuki S,Fujimoto Y

doi

10.1016/j.bmcl.2018.03.042

subject

Has Abstract

pub_date

2018-05-15 00:00:00

pages

1638-1641

issue

9

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(18)30235-X

journal_volume

28

pub_type

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