登録情報 データベース : EMDB / ID : EMD-61047 ダウンロードとリンクタイトル Cyro-EM Structure of Human TLR4/MD-2/DLAM1 Complex マップデータmain map 詳細 試料複合体 : human TLR4/MD-2/DLAM1 complexタンパク質・ペプチド : Lymphocyte antigen 96タンパク質・ペプチド : Toll-like receptor 4リガンド : (3R)-3-(dodecanoyloxy)tetradecanoic acidリガンド : 2-acetamido-2-deoxy-beta-D-glucopyranoseリガンド : 2-amino-2-deoxy-4-O-phosphono-alpha-D-glucopyranoseリガンド : [(2~{R},3~{S},4~{S},5~{S})-5-methoxy-3,4,6-tris(oxidanyl)oxan-2-yl]methyl dihydrogen phosphate 詳細 キーワード Innate immune system / Toll-like receptors / TLR4 agonist / Vaccine adjuvants / Disaccharide-based Lipid A Mimetics / IMMUNE SYSTEM機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
MHC class II biosynthetic process / detection of fungus / nitric oxide production involved in inflammatory response / growth plate cartilage morphogenesis / positive regulation of cellular response to macrophage colony-stimulating factor stimulus / lipopolysaccharide immune receptor activity / positive regulation of nucleotide-binding oligomerization domain containing 1 signaling pathway / Toll-like receptor 4 binding / positive regulation of matrix metallopeptidase secretion / detection of lipopolysaccharide ... MHC class II biosynthetic process / detection of fungus / nitric oxide production involved in inflammatory response / growth plate cartilage morphogenesis / positive regulation of cellular response to macrophage colony-stimulating factor stimulus / lipopolysaccharide immune receptor activity / positive regulation of nucleotide-binding oligomerization domain containing 1 signaling pathway / Toll-like receptor 4 binding / positive regulation of matrix metallopeptidase secretion / detection of lipopolysaccharide / regulation of dendritic cell cytokine production / lipopolysaccharide receptor complex / MyD88-independent TLR4 cascade / negative regulation of interleukin-23 production / cellular response to oxidised low-density lipoprotein particle stimulus / wound healing involved in inflammatory response / nucleotide-binding oligomerization domain containing 1 signaling pathway / B cell proliferation involved in immune response / TRIF-mediated programmed cell death / positive regulation of nucleotide-binding oligomerization domain containing 2 signaling pathway / positive regulation of stress-activated MAPK cascade / Toll Like Receptor 4 (TLR4) Cascade / Caspase activation via Death Receptors in the presence of ligand / positive regulation of interleukin-1 production / TRIF-dependent toll-like receptor signaling pathway / Regulation of TLR by endogenous ligand / intestinal epithelial structure maintenance / macrophage activation / astrocyte development / microglia differentiation / nucleotide-binding oligomerization domain containing 2 signaling pathway / positive regulation of MHC class II biosynthetic process / positive regulation of platelet activation / negative regulation of interleukin-17 production / positive regulation of macrophage activation / positive regulation of lipopolysaccharide-mediated signaling pathway / MyD88 deficiency (TLR2/4) / positive regulation of chemokine (C-X-C motif) ligand 2 production / positive regulation of cytokine production involved in inflammatory response / IRAK4 deficiency (TLR2/4) / negative regulation of cold-induced thermogenesis / MyD88:MAL(TIRAP) cascade initiated on plasma membrane / positive regulation of extrinsic apoptotic signaling pathway / positive regulation of macrophage cytokine production / MyD88-dependent toll-like receptor signaling pathway / T-helper 1 type immune response / toll-like receptor 4 signaling pathway / positive regulation of smooth muscle cell migration / toll-like receptor signaling pathway / RSV-host interactions / negative regulation of osteoclast differentiation / cellular response to lipoteichoic acid / positive regulation of NLRP3 inflammasome complex assembly / positive regulation of reactive oxygen species biosynthetic process / negative regulation of type II interferon production / negative regulation of interleukin-6 production / Respiratory syncytial virus (RSV) attachment and entry / positive regulation of interferon-alpha production / positive regulation of interleukin-10 production / negative regulation of tumor necrosis factor production / phagocytosis / stress-activated MAPK cascade / phagocytic cup / positive regulation of B cell proliferation / JNK cascade / ERK1 and ERK2 cascade / cellular response to platelet-derived growth factor stimulus / positive regulation of chemokine production / ruffle / nitric oxide biosynthetic process / positive regulation of interleukin-12 production / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / positive regulation of interferon-beta production / positive regulation of smooth muscle cell proliferation / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / lipopolysaccharide-mediated signaling pathway / TRAF6-mediated induction of TAK1 complex within TLR4 complex / : / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / positive regulation of interleukin-1 beta production / positive regulation of interleukin-8 production / IKK complex recruitment mediated by RIP1 / Heme signaling / lipopolysaccharide binding / cellular response to mechanical stimulus / negative regulation of ERK1 and ERK2 cascade / positive regulation of interleukin-6 production / positive regulation of JNK cascade / cellular response to type II interferon / positive regulation of type II interferon production / cellular response to amyloid-beta / positive regulation of nitric oxide biosynthetic process / positive regulation of tumor necrosis factor production / positive regulation of inflammatory response / transmembrane signaling receptor activity / amyloid-beta binding / ER-Phagosome pathway / cellular response to lipopolysaccharide / signaling receptor activity / response to lipopolysaccharide 類似検索 - 分子機能 Lymphocyte antigen 96 / ML domain / MD-2-related lipid-recognition domain / Domain involved in innate immunity and lipid metabolism. / Toll-like receptor / Leucine rich repeat 4 / Leucine Rich repeats (2 copies) / TIR domain / Leucine Rich repeat / Cysteine-rich flanking region, C-terminal ... Lymphocyte antigen 96 / ML domain / MD-2-related lipid-recognition domain / Domain involved in innate immunity and lipid metabolism. / Toll-like receptor / Leucine rich repeat 4 / Leucine Rich repeats (2 copies) / TIR domain / Leucine Rich repeat / Cysteine-rich flanking region, C-terminal / Leucine rich repeat C-terminal domain / Toll - interleukin 1 - resistance / TIR domain profile. / Leucine-rich repeat, SDS22-like subfamily / Toll/interleukin-1 receptor homology (TIR) domain / Toll/interleukin-1 receptor homology (TIR) domain superfamily / Leucine rich repeat / Leucine-rich repeat, typical subtype / Leucine-rich repeats, typical (most populated) subfamily / Leucine-rich repeat profile. / Leucine-rich repeat / Leucine-rich repeat domain superfamily / Immunoglobulin E-set 類似検索 - ドメイン・相同性 Lymphocyte antigen 96 / Toll-like receptor 4 類似検索 - 構成要素生物種 Homo sapiens (ヒト)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 2.7 Å 詳細 データ登録者Fu Y / Kim H / Zamyatina A / Kim HM 資金援助 1件 詳細 詳細を隠すOrganization Grant number 国 Other government
引用ジャーナル : Nat Commun / 年 : 2025タイトル : Structural insight into TLR4/MD-2 activation by synthetic LPS mimetics with distinct binding modes.著者 : Yaoyao Fu / Hyojin Kim / Dong Sun Lee / Ah-Reum Han / Holger Heine / Alla Zamyatina / Ho Min Kim / 要旨 : The mammalian pattern-recognition receptor TLR4/MD-2 (Toll-like receptor 4/myeloid differentiation factor-2) can be activated by a wide variety of pathogen-associated and endogenous molecules, with ... The mammalian pattern-recognition receptor TLR4/MD-2 (Toll-like receptor 4/myeloid differentiation factor-2) can be activated by a wide variety of pathogen-associated and endogenous molecules, with Gram-negative bacterial lipopolysaccharide (LPS) being the primary natural TLR4 agonist. Activation of TLR4 triggers cellular signaling that enables the beneficial innate immune responses and enhances adaptive immunity, thereby emphasizing the potential of TLR4 agonists for the management of diseases with an immunopathological background and for use as vaccine adjuvants. Given the challenges associated with LPS-derived products, including structural complexity, heterogeneity, toxicity, and species specificity, synthetic molecules targeting TLR4/MD-2 offer a promising alternative. Here, we elucidate the structural basis for the recognition of synthetic LPS-mimicking glycolipids, Disaccharide Lipid A Mimetics (DLAMs), by human and mouse TLR4/MD-2 through cryo-EM structures of six dimeric [TLR4/MD-2/ligand] complexes resolved at 2.2-3.1 Å. We reveal that the specific binding modes of DLAMs, distinct from those of LPS, are essential for the species-independent TLR4 agonistic activity. DLAMs function as a molecular bridge, effectively induce the dimerization of TLR4/MD-2 complexes through specific carbohydrate structure-relevant ligand-protein interactions. Our findings reveal the distinct molecular modes of TLR4 activation, and provide a structural basis for the rationale design and development of innovative, highly potent TLR4-targeting immunotherapeutics and adjuvants. 履歴 登録 2024年8月2日 - ヘッダ(付随情報) 公開 2025年5月14日 - マップ公開 2025年5月14日 - 更新 2025年5月14日 - 現状 2025年5月14日 処理サイト : PDBj / 状態 : 公開
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