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基本情報
登録情報 | データベース: PDB / ID: 6ur8 | ||||||
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タイトル | CryoEM structure of human alpha4beta2 nicotinic acetylcholine receptor in complex with varenicline | ||||||
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![]() | MEMBRANE PROTEIN / acetylcholine receptor / nicotine / varenicline | ||||||
機能・相同性 | ![]() vestibulocochlear nerve development / lateral geniculate nucleus development / regulation of circadian sleep/wake cycle, REM sleep / regulation of synaptic transmission, dopaminergic / quaternary ammonium group binding / synaptic transmission involved in micturition / optic nerve morphogenesis / Highly sodium permeable postsynaptic acetylcholine nicotinic receptors / Highly calcium permeable nicotinic acetylcholine receptors / central nervous system projection neuron axonogenesis ...vestibulocochlear nerve development / lateral geniculate nucleus development / regulation of circadian sleep/wake cycle, REM sleep / regulation of synaptic transmission, dopaminergic / quaternary ammonium group binding / synaptic transmission involved in micturition / optic nerve morphogenesis / Highly sodium permeable postsynaptic acetylcholine nicotinic receptors / Highly calcium permeable nicotinic acetylcholine receptors / central nervous system projection neuron axonogenesis / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine receptor activity / cholinergic synapse / regulation of dopamine metabolic process / acetylcholine-gated channel complex / positive regulation of dopamine secretion / negative regulation of action potential / neuromuscular synaptic transmission / behavioral response to nicotine / acetylcholine-gated monoatomic cation-selective channel activity / cation channel complex / inhibitory postsynaptic potential / acetylcholine binding / nervous system process / synaptic transmission, cholinergic / acetylcholine receptor signaling pathway / neurotransmitter receptor complex / postsynaptic specialization membrane / ligand-gated monoatomic ion channel activity / regulation of dendrite morphogenesis / regulation of synapse assembly / heterocyclic compound binding / regulation of dopamine secretion / social behavior / associative learning / B cell activation / action potential / plasma membrane raft / membrane depolarization / smooth muscle contraction / monoatomic ion transport / positive regulation of B cell proliferation / sensory perception of pain / visual perception / learning / regulation of membrane potential / locomotory behavior / response to nicotine / sensory perception of sound / response to cocaine / electron transport chain / visual learning / memory / cognition / calcium ion transport / presynaptic membrane / monoatomic ion transmembrane transport / chemical synaptic transmission / response to oxidative stress / response to ethanol / postsynaptic membrane / periplasmic space / response to hypoxia / electron transfer activity / neuron projection / iron ion binding / external side of plasma membrane / DNA repair / neuronal cell body / synapse / heme binding / dendrite / protein-containing complex binding / signal transduction / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() | ||||||
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: 3.71 Å | ||||||
![]() | Alvarez, F.J.D. / Mukherjee, S. / Han, S. / Ammirati, M. / Kossiakoff, A.A. | ||||||
![]() | ![]() タイトル: Synthetic antibodies against BRIL as universal fiducial marks for single-particle cryoEM structure determination of membrane proteins. 著者: Somnath Mukherjee / Satchal K Erramilli / Mark Ammirati / Frances J D Alvarez / Kimberly F Fennell / Michael D Purdy / Blazej M Skrobek / Katarzyna Radziwon / John Coukos / Yanyong Kang / ...著者: Somnath Mukherjee / Satchal K Erramilli / Mark Ammirati / Frances J D Alvarez / Kimberly F Fennell / Michael D Purdy / Blazej M Skrobek / Katarzyna Radziwon / John Coukos / Yanyong Kang / Przemysław Dutka / Xiang Gao / Xiayang Qiu / Mark Yeager / H Eric Xu / Seungil Han / Anthony A Kossiakoff / ![]() ![]() ![]() 要旨: We propose the concept of universal fiducials based on a set of pre-made semi-synthetic antibodies (sABs) generated by customized phage display selections against the fusion protein BRIL, an ...We propose the concept of universal fiducials based on a set of pre-made semi-synthetic antibodies (sABs) generated by customized phage display selections against the fusion protein BRIL, an engineered variant of apocytochrome b562a. These sABs can bind to BRIL fused either into the loops or termini of different GPCRs, ion channels, receptors and transporters without disrupting their structure. A crystal structure of BRIL in complex with an affinity-matured sAB (BAG2) that bound to all systems tested delineates the footprint of interaction. Negative stain and cryoEM data of several examples of BRIL-membrane protein chimera highlight the effectiveness of the sABs as universal fiducial marks. Taken together with a cryoEM structure of sAB bound human nicotinic acetylcholine receptor, this work demonstrates that these anti-BRIL sABs can greatly enhance the particle properties leading to improved cryoEM outcomes, especially for challenging membrane proteins. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 334.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 268.7 KB | 表示 | ![]() |
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-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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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: 56027.848 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() ![]() 遺伝子: CHRNA4, NACRA4, cybC / プラスミド: pcDNA3.1(+) / 細胞株 (発現宿主): Expi293F / 発現宿主: ![]() #2: タンパク質 | 分子量: 45931.953 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #3: 糖 | ChemComp-NAG / #4: 化合物 | #5: 糖 | 研究の焦点であるリガンドがあるか | Y | 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 alpha4beta2 nicotinic acetylcholine receptor in complex fab fragments and bound to varenicline タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT | |||||||||||||||||||||||||||||||||||
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分子量 | 実験値: NO | |||||||||||||||||||||||||||||||||||
由来(天然) | 生物種: ![]() | |||||||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() | |||||||||||||||||||||||||||||||||||
緩衝液 | pH: 7.5 | |||||||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 3 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: GOLD / グリッドのタイプ: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||||||||||||
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: 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): 2400 nm / 最小 デフォーカス(公称値): 1200 nm / Cs: 2.7 mm / C2レンズ絞り径: 100 µm |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 10.5 sec. / 電子線照射量: 52 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 1 |
画像スキャン | 動画フレーム数/画像: 35 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1867100 | ||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.71 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 226962 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Accession code: 6CNJ / Initial refinement model-ID: 1 / PDB-ID: 6CNJ / Source name: PDB / タイプ: experimental model
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