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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: 9ivp | ||||||
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タイトル | 24-mer DARPin-apoferritin scaffold in complex with the maltose binding protein | ||||||
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![]() | BIOSYNTHETIC PROTEIN / DARPin / apoferritin / scaffold / maltose binding protein | ||||||
機能・相同性 | ![]() iron ion sequestering activity / ferritin complex / Scavenging by Class A Receptors / negative regulation of ferroptosis / Golgi Associated Vesicle Biogenesis / ferroxidase / autolysosome / ferroxidase activity / carbohydrate transmembrane transporter activity / maltose binding ...iron ion sequestering activity / ferritin complex / Scavenging by Class A Receptors / negative regulation of ferroptosis / Golgi Associated Vesicle Biogenesis / ferroxidase / autolysosome / ferroxidase activity / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / negative regulation of fibroblast proliferation / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ferric iron binding / autophagosome / Iron uptake and transport / ferrous iron binding / iron ion transport / tertiary granule lumen / outer membrane-bounded periplasmic space / ficolin-1-rich granule lumen / intracellular iron ion homeostasis / immune response / iron ion binding / negative regulation of cell population proliferation / Neutrophil degranulation / extracellular exosome / extracellular region / identical protein binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | synthetic construct (人工物)![]() ![]() ![]() | ||||||
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: 3 Å | ||||||
![]() | Lu, X. / Yan, M. / Zhang, H.M. / Hao, Q. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: A large, general and modular DARPin-apoferritin scaffold enables the visualization of small proteins by cryo-EM. 著者: Xin Lu / Ming Yan / Yang Cai / Xi Song / Huan Chen / Mengtan Du / Zhenyi Wang / Jia'an Li / Liwen Niu / Fuxing Zeng / Quan Hao / Hongmin Zhang / ![]() 要旨: Single-particle cryo-electron microscopy (cryo-EM) has emerged as an indispensable technique in structural biology that is pivotal for deciphering protein architectures. However, the medium-sized ...Single-particle cryo-electron microscopy (cryo-EM) has emerged as an indispensable technique in structural biology that is pivotal for deciphering protein architectures. However, the medium-sized proteins (30-40 kDa) that are prevalent in both eukaryotic and prokaryotic organisms often elude the resolving capabilities of contemporary cryo-EM methods. To address this challenge, we engineered a scaffold strategy that securely anchors proteins of interest to a robust, symmetric base via a selective adapter. Our most efficacious constructs, namely models 4 and 6c, feature a designed ankyrin-repeat protein (DARPin) rigidly linked to an octahedral human apoferritin via a helical linker. By utilizing these large, highly symmetric scaffolds (∼1 MDa), we achieved near-atomic-resolution cryo-EM structures of green fluorescent protein (GFP) and maltose-binding protein (MBP), revealing nearly all side-chain densities of GFP and the distinct structural features of MBP. The modular design of our scaffold allows the adaptation of new DARPins through minor amino-acid-sequence modifications, enabling the binding and visualization of a diverse array of proteins. The high symmetry and near-spherical shape of the scaffold not only mitigates the prevalent challenge of preferred particle orientation in cryo-EM but also significantly reduces the demands of image collection and data processing. This approach presents a versatile solution, breaking through the size constraints that have traditionally limited single-particle cryo-EM. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 3.2 MB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.6 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.7 MB | 表示 | |
XML形式データ | ![]() | 362.5 KB | 表示 | |
CIF形式データ | ![]() | 611.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 60931MC ![]() 9irvC ![]() 9j48C 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 ![]() |
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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: タンパク質 | 分子量: 41047.145 Da / 分子数: 24 / 由来タイプ: 組換発現 由来: (組換発現) synthetic construct (人工物), (組換発現) ![]() 遺伝子: FTH1, FTH, FTHL6, OK/SW-cl.84, PIG15 / 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 45694.176 Da / 分子数: 24 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 遺伝子: malE, ACN81_05700, ACU57_23670, B6R31_000964, BANRA_02708, BANRA_05111, BCB93_001091, BG944_002391, BGM66_004246, BGZ_01772, BGZ_04952, BJI68_06200, BK292_00970, BTB68_002078, BTQ06_17300, ...遺伝子: malE, ACN81_05700, ACU57_23670, B6R31_000964, BANRA_02708, BANRA_05111, BCB93_001091, BG944_002391, BGM66_004246, BGZ_01772, BGZ_04952, BJI68_06200, BK292_00970, BTB68_002078, BTQ06_17300, BvCmsKKP061_03224, BvCmsSIP010_04050, C0P57_003867, C1Q91_002164, C2R31_001890, C3F40_15210, CF22_001770, CG704_16590, CIG67_12040, CQ842_10105, CQ842_11395, CTR35_003815, CV83915_02005, D4M65_12865, DIV22_28370, DNX30_07695, DS732_01860, DTL43_19585, E2865_05243, E4K51_08355, E5H86_20640, E6D34_15030, EAI46_20350, ECs5017, EIZ93_13775, EN85_000970, EPS97_17355, ExPECSC038_04540, F9461_21760, FGAF848_44030, FIJ20_18085, FJQ40_13885, FOI11_015465, FOI11_20215, FPS11_04610, FWK02_22115, G3V95_18070, G4A38_02205, G4A47_04495, GAI89_05080, GAJ12_13200, GKF66_19285, GNW61_17855, GOP25_18965, GP965_07770, GP975_07695, GP979_10140, GQA06_09595, GQE86_14675, GQM04_22095, GQM21_08325, GRW05_14255, GRW24_12940, GUC01_08260, H0O72_20100, HEP30_015080, HHH44_003952, HLX92_13085, HMV95_14740, HV109_22180, HV209_20940, HVW43_14700, HVY77_23840, I6H00_16895, I6H02_15990, J0541_001933, J5U05_001620, JNP96_01525, NCTC10418_07064, NCTC10429_00012, NCTC10865_05806, NCTC11126_02082, NCTC11181_01902, NCTC13148_04480, NCTC8009_08341, NCTC8179_05034, NCTC8333_05503, NCTC8500_05253, NCTC8622_01707, NCTC8960_02276, NCTC8985_03950, NCTC9706_01951, NCTC9962_03706, P6223_003521, QDW62_24215, RZR61_19445, SAMEA3752557_02201, WR15_07725 発現宿主: ![]() ![]() Has protein modification | N | |
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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: 24-mer DARPin-apoferritin in complex with the maltose binding protein タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||
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由来(天然) |
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由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||
緩衝液 | pH: 8 | ||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||
急速凍結 | 凍結剤: ETHANE |
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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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
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): 800 nm |
撮影 | 電子線照射量: 1.28 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 91926 / 対称性のタイプ: POINT |