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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9x1h | ||||||
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| タイトル | Cryo-EM Structure of human complement C1s CUB domain in complex with RAY121 | ||||||
要素 |
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キーワード | IMMUNE SYSTEM / PH-DEPENDENT / RECYCLING ANTIBODY / COMPLEMENT C1s / FAB / COMPLEX / CUB DOMAIN / EGF-LIKE DOMAIN | ||||||
| 機能・相同性 | 機能・相同性情報complement subcomponent C_overbar_1s_ / Classical antibody-mediated complement activation / Initial triggering of complement / complement activation, classical pathway / Regulation of Complement cascade / blood microparticle / innate immune response / serine-type endopeptidase activity / calcium ion binding / proteolysis ...complement subcomponent C_overbar_1s_ / Classical antibody-mediated complement activation / Initial triggering of complement / complement activation, classical pathway / Regulation of Complement cascade / blood microparticle / innate immune response / serine-type endopeptidase activity / calcium ion binding / proteolysis / extracellular space / extracellular region / identical protein binding 類似検索 - 分子機能 | ||||||
| 生物種 | Homo sapiens (ヒト) | ||||||
| 手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.6 Å | ||||||
データ登録者 | Kawauchi, H. / Adrian, H. / Gupta, G. / Koga, H. / Fujii, T. / Fukumura, T. / Ishino, S. / Irie, M. / Torizawa, T. | ||||||
| 資金援助 | 1件
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引用 | ジャーナル: EBioMedicine / 年: 2025タイトル: Long lasting complement neutralisation by RAY121, an engineered anti-C1s antibody with C1q displacement function. 著者: Adrian W S Ho / Taku Fukuzawa / Hikaru Koga / Ken Ohmine / Hiroki Kawauchi / Masaru Muraoka / Yuri Ikuta / Garvita Gupta / Momoko Okuda / Ichio Onami / Miho Ayabe / Akira Takeiri / Hideyuki ...著者: Adrian W S Ho / Taku Fukuzawa / Hikaru Koga / Ken Ohmine / Hiroki Kawauchi / Masaru Muraoka / Yuri Ikuta / Garvita Gupta / Momoko Okuda / Ichio Onami / Miho Ayabe / Akira Takeiri / Hideyuki Konishi / Yui Sugawara / Shoko Usami / Eriko Ito / Norihito Shibahara / Kazuhisa Ozeki / Yukiko Wada / Ayano Hirako / Noriyuki Takahashi / Zenjiro Sampei / Kenta Haraya / Naoaki Murao / Takashi Fujii / Takuya Torizawa / Hideaki Shimada / Tomoyuki Igawa / ![]() 要旨: BACKGROUND: Antibody drugs blocking the complement classical pathway (CP) often require frequent intravenous administration to overcome the high abundance or rapid turnover of complement proteins. ...BACKGROUND: Antibody drugs blocking the complement classical pathway (CP) often require frequent intravenous administration to overcome the high abundance or rapid turnover of complement proteins. This makes treatment compliance burdensome for patients. 手法: Screening was performed to identify anti-C1s antibodies specific for the CUB domain of C1s with CP neutralising function. Antibody engineering was performed on the anti-C1s antibody to ...手法: Screening was performed to identify anti-C1s antibodies specific for the CUB domain of C1s with CP neutralising function. Antibody engineering was performed on the anti-C1s antibody to prolong its half-life in circulation. The variable region was mutated to confer pH-dependent binding to C1s, and the antibody Fc was modified to lower its isoelectric point and to have enhanced binding to the neonatal Fc receptor. FINDINGS: A combination of pH-dependent binding to C1s and optimisation of charge characteristics was required for the final engineered antibody, RAY121, to achieve a long half-life in circulation ...FINDINGS: A combination of pH-dependent binding to C1s and optimisation of charge characteristics was required for the final engineered antibody, RAY121, to achieve a long half-life in circulation and long-lasting neutralisation of the CP. In male cynomolgus monkeys, a single subcutaneous injection suppressed CP activity for more than a month. RAY121 neutralises the CP by using a unique mechanism of displacing C1q from the C1 complex and blocking its reassembly. Structure analysis by cryo-electron microscopy revealed that the RAY121 epitope on C1s is distinct from the C1q binding site, and that C1q displacement is mediated by the Fab arm sterically obstructing C1q binding to C1s. INTERPRETATION: RAY121 is able to neutralise the CP for an extended duration and is effective at doses that can be administered subcutaneously for convenient treatment. These data present RAY121 as a ...INTERPRETATION: RAY121 is able to neutralise the CP for an extended duration and is effective at doses that can be administered subcutaneously for convenient treatment. These data present RAY121 as a promising agent for the treatment of CP-driven autoimmune disorders. FUNDING: Chugai Pharmaceutical Co. Ltd. | ||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9x1h.cif.gz | 202.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9x1h.ent.gz | 124.2 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9x1h.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| 文書・要旨 | 9x1h_validation.pdf.gz | 385.3 KB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9x1h_full_validation.pdf.gz | 390.7 KB | 表示 | |
| XML形式データ | 9x1h_validation.xml.gz | 15.2 KB | 表示 | |
| CIF形式データ | 9x1h_validation.cif.gz | 23.6 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/x1/9x1h ftp://data.pdbj.org/pub/pdb/validation_reports/x1/9x1h | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 61792 ![]() 66460MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: 抗体 | 分子量: 24034.600 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 細胞株 (発現宿主): Expi293F TM cells / 発現宿主: Homo sapiens (ヒト)#2: 抗体 | 分子量: 24044.895 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 細胞株 (発現宿主): Expi293F TM cells / 発現宿主: Homo sapiens (ヒト)#3: タンパク質 | 分子量: 32556.850 Da / 分子数: 2 / 由来タイプ: 組換発現 / 詳細: 278-290: purification tag / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: C1S / 細胞株 (発現宿主): Expi293F TM cells / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P09871#4: 化合物 | ChemComp-CA / 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
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-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
| 構成要素 | 名称: human complement C1s CUB domain in complex with RAY121 タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT | ||||||||||||||||||||
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| 分子量 |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) | ||||||||||||||||||||
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: Expi293F TM cells | ||||||||||||||||||||
| 緩衝液 | pH: 7.5 / 詳細: 20mM HEPES(7.5), 150mM NaCl, 3mM CaCl2, 0.03% DDM | ||||||||||||||||||||
| 試料 | 濃度: 5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
| 試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R0.6/1 | ||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
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電子顕微鏡撮影
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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| 顕微鏡 | モデル: TFS KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1500 nm |
| 撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1101481 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
| 原子モデル構築 | 3D fitting-ID: 1
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| 精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||||||
| 原子変位パラメータ | Biso mean: 13.43 Å2 | ||||||||||||||||||||||||||||||||
| 拘束条件 |
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万見について




Homo sapiens (ヒト)
引用



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FIELD EMISSION GUN
