- PDB-9lsi: Cryo-EM structure of the S82C-S82C diabody complex (CitS-diabody ... -
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基本情報
登録情報
データベース: PDB / ID: 9lsi
タイトル
Cryo-EM structure of the S82C-S82C diabody complex (CitS-diabody #2-TLR3)
要素
Citrate/sodium symporter
Diabody (CitS VH-TLR3 VL)
Diabody (TLR3 VH-CitS VL)
Toll-like receptor 3
キーワード
STRUCTURAL PROTEIN/IMMUNE SYSTEM / Disulfide-bridged diabody / cryo-electron microscopy (cryo-EM) / small protein imaging / structural marker / antibody engineering / protein nanotechnology / STRUCTURAL PROTEIN / STRUCTURAL PROTEIN-IMMUNE SYSTEM complex
機能・相同性
機能・相同性情報
TLR3 deficiency - HSE / response to dsRNA / UNC93B1 deficiency - HSE / type III interferon production / positive regulation of type III interferon production / TICAM1 deficiency - HSE / TRAF3 deficiency - HSE / regulation of dendritic cell cytokine production / Toll Like Receptor 3 (TLR3) Cascade / citrate metabolic process ...TLR3 deficiency - HSE / response to dsRNA / UNC93B1 deficiency - HSE / type III interferon production / positive regulation of type III interferon production / TICAM1 deficiency - HSE / TRAF3 deficiency - HSE / regulation of dendritic cell cytokine production / Toll Like Receptor 3 (TLR3) Cascade / citrate metabolic process / inflammatory response to wounding / TLR3-mediated TICAM1-dependent programmed cell death / activation of NF-kappaB-inducing kinase activity / toll-like receptor 3 signaling pathway / detection of virus / necroptotic signaling pathway / symporter activity / : / RIP-mediated NFkB activation via ZBP1 / endolysosome membrane / positive regulation of cytokine production involved in inflammatory response / Trafficking and processing of endosomal TLR / hyperosmotic response / positive regulation of macrophage cytokine production / toll-like receptor signaling pathway / sodium ion transport / pattern recognition receptor activity / cellular response to exogenous dsRNA / RSV-host interactions / response to exogenous dsRNA / negative regulation of osteoclast differentiation / ubiquitin-like protein ligase binding / positive regulation of interferon-alpha production / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / TICAM1,TRAF6-dependent induction of TAK1 complex / TICAM1-dependent activation of IRF3/IRF7 / cellular response to interferon-beta / positive regulation of chemokine production / JNK cascade / extrinsic apoptotic signaling pathway / TICAM1, RIP1-mediated IKK complex recruitment / positive regulation of interleukin-12 production / extracellular matrix / positive regulation of interferon-beta production / positive regulation of interleukin-8 production / positive regulation of JNK cascade / microglial cell activation / cellular response to mechanical stimulus / cellular response to virus / cellular response to type II interferon / positive regulation of interleukin-6 production / male gonad development / cellular response to xenobiotic stimulus / positive regulation of type II interferon production / positive regulation of angiogenesis / positive regulation of inflammatory response / positive regulation of tumor necrosis factor production / transmembrane signaling receptor activity / signaling receptor activity / double-stranded RNA binding / defense response to virus / early endosome / endosome membrane / positive regulation of canonical NF-kappaB signal transduction / defense response to bacterium / positive regulation of apoptotic process / Golgi membrane / innate immune response / lysosomal membrane / endoplasmic reticulum membrane / positive regulation of gene expression / signal transduction / positive regulation of transcription by RNA polymerase II / extracellular space / metal ion binding / identical protein binding / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能
ジャーナル: Structure / 年: 2025 タイトル: Disulfide-stabilized diabodies enable near-atomic cryo-EM imaging of small proteins: A case study of the bacterial Na/citrate symporter CitS. 著者: Subin Kim / Ji Won Kim / Jun Gyou Park / Sang Soo Lee / Seung Hun Choi / Jie-Oh Lee / Mi Sun Jin / 要旨: Diabodies are engineered antibody fragments with two antigen-binding Fv domains. Previously, we demonstrated that they are often highly flexible but can be rigidified by introducing a disulfide bond ...Diabodies are engineered antibody fragments with two antigen-binding Fv domains. Previously, we demonstrated that they are often highly flexible but can be rigidified by introducing a disulfide bond at the Fv interface. In this study, we explored the potential of disulfide-bridged, bispecific diabodies for near-atomic cryoelectron microscopy (cryo-EM) imaging of small proteins because they can predictably link target proteins to "structural marker" proteins. As a case study, we used the bacterial citrate transporter CitS as the target protein, and the horseshoe-shaped ectodomain of human Toll-like receptor 3 (TLR3) as the marker. We show that diabodies containing one or two disulfide bonds enabled the 3D reconstruction of CitS at resolutions of 3.3 Å and 3.1 Å, respectively. This resolution surpassed previous crystallographic results and allowed us to visualize the high-resolution structural features of the transporter. Our work expands the application of diabodies in structural biology to address a key limitation in the field.
履歴
登録
2025年2月4日
登録サイト: PDBJ / 処理サイト: PDBJ
改定 1.0
2025年3月12日
Provider: repository / タイプ: Initial release
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2025年3月12日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
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2025年3月12日
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2025年3月12日
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2025年3月12日
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改定 1.0
2025年3月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release