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基本情報
登録情報 | データベース: PDB / ID: 3j5q | |||||||||
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タイトル | Structure of TRPV1 ion channel in complex with DkTx and RTX determined by single particle electron cryo-microscopy | |||||||||
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![]() | TRANSPORT PROTEIN/TOXIN / TRPV1 channel / DkTx / RTX / TRANSPORT PROTEIN-TOXIN complex | |||||||||
機能・相同性 | ![]() negative regulation of establishment of blood-brain barrier / response to capsazepine / sensory perception of mechanical stimulus / peptide secretion / cellular response to temperature stimulus / excitatory extracellular ligand-gated monoatomic ion channel activity / temperature-gated ion channel activity / detection of chemical stimulus involved in sensory perception of pain / TRP channels / smooth muscle contraction involved in micturition ...negative regulation of establishment of blood-brain barrier / response to capsazepine / sensory perception of mechanical stimulus / peptide secretion / cellular response to temperature stimulus / excitatory extracellular ligand-gated monoatomic ion channel activity / temperature-gated ion channel activity / detection of chemical stimulus involved in sensory perception of pain / TRP channels / smooth muscle contraction involved in micturition / fever generation / urinary bladder smooth muscle contraction / detection of temperature stimulus involved in thermoception / thermoception / cellular response to acidic pH / negative regulation of systemic arterial blood pressure / chloride channel regulator activity / response to pH / dendritic spine membrane / glutamate secretion / monoatomic cation transmembrane transporter activity / negative regulation of heart rate / ligand-gated monoatomic ion channel activity / response to pain / ion channel inhibitor activity / temperature homeostasis / diet induced thermogenesis / cellular response to alkaloid / cellular response to ATP / cellular response to cytokine stimulus / detection of temperature stimulus involved in sensory perception of pain / intracellularly gated calcium channel activity / behavioral response to pain / negative regulation of mitochondrial membrane potential / calcium ion import across plasma membrane / sodium channel regulator activity / potassium channel regulator activity / monoatomic cation channel activity / extracellular ligand-gated monoatomic ion channel activity / sensory perception of pain / phosphatidylinositol binding / phosphoprotein binding / microglial cell activation / response to peptide hormone / cellular response to nerve growth factor stimulus / calcium ion transmembrane transport / GABA-ergic synapse / cellular response to growth factor stimulus / calcium channel activity / lipid metabolic process / positive regulation of nitric oxide biosynthetic process / calcium ion transport / cellular response to tumor necrosis factor / transmembrane signaling receptor activity / sensory perception of taste / cellular response to heat / positive regulation of cytosolic calcium ion concentration / toxin activity / response to heat / monoatomic ion transmembrane transport / protein homotetramerization / postsynaptic membrane / calmodulin binding / neuron projection / positive regulation of apoptotic process / external side of plasma membrane / neuronal cell body / dendrite / negative regulation of transcription by RNA polymerase II / extracellular region / ATP binding / metal ion binding / identical protein binding / 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: 3.8 Å | |||||||||
![]() | Liao, M. / Cao, E. / Julius, D. / Cheng, Y. | |||||||||
![]() | ![]() タイトル: TRPV1 structures in distinct conformations reveal activation mechanisms. 著者: Erhu Cao / Maofu Liao / Yifan Cheng / David Julius / ![]() 要旨: Transient receptor potential (TRP) channels are polymodal signal detectors that respond to a wide range of physical and chemical stimuli. Elucidating how these channels integrate and convert ...Transient receptor potential (TRP) channels are polymodal signal detectors that respond to a wide range of physical and chemical stimuli. Elucidating how these channels integrate and convert physiological signals into channel opening is essential to understanding how they regulate cell excitability under normal and pathophysiological conditions. Here we exploit pharmacological probes (a peptide toxin and small vanilloid agonists) to determine structures of two activated states of the capsaicin receptor, TRPV1. A domain (consisting of transmembrane segments 1-4) that moves during activation of voltage-gated channels remains stationary in TRPV1, highlighting differences in gating mechanisms for these structurally related channel superfamilies. TRPV1 opening is associated with major structural rearrangements in the outer pore, including the pore helix and selectivity filter, as well as pronounced dilation of a hydrophobic constriction at the lower gate, suggesting a dual gating mechanism. Allosteric coupling between upper and lower gates may account for rich physiological modulation exhibited by TRPV1 and other TRP channels. | |||||||||
履歴 |
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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 | ![]() | 432.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 339 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 949.1 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 111.5 KB | 表示 | |
CIF形式データ | ![]() | 159.6 KB | 表示 | |
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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: 70795.211 Da / 分子数: 4 / 断片: SEE REMARK 999 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: タンパク質・ペプチド | 分子量: 3433.014 Da / 分子数: 4 / 断片: UNP residues 51-81 / 由来タイプ: 天然 / 由来: (天然) ![]() 配列の詳細 | THE TRPV1 CONSTRUCT COMPRISES RESIDUES 110-603 AND 627-764, WITH RESIDUES 604-626 DELETED. RESIDUES ...THE TRPV1 CONSTRUCT COMPRISES RESIDUES 110-603 AND 627-764, WITH RESIDUES 604-626 DELETED. RESIDUES 719-764 ARE NOT MODELED, WITH THE EXCEPTION OF 11 RESIDUES (NUMBERED 752-762 IN THE COORDINATE | |
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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: Rat TRPV1 in complex with DkTx and resiniferatoxin / タイプ: COMPLEX / 詳細: Tetramer |
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分子量 | 値: 0.3 MDa / 実験値: NO |
緩衝液 | 名称: 150 mM NaCl, 20 mM HEPES, 2 mM TCEP / pH: 7.4 / 詳細: 150 mM NaCl, 20 mM HEPES, 2 mM TCEP |
試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: 400 mesh Quantifoil grid |
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE / Temp: 120 K / 湿度: 90 % 詳細: Blot for 6 seconds before plunging into liquid ethane (FEI VITROBOT MARK III) 手法: Blot for 6 sec |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Tecnai Polara / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI POLARA 300 / 日付: 2013年1月1日 詳細: Gatan K2 Summit operated in super-resolution counting mode, image recorded with dose fractionation method. |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 31000 X / 倍率(補正後): 31000 X / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1500 nm / Cs: 2 mm / カメラ長: 0 mm |
試料ホルダ | 試料ホルダーモデル: OTHER / 資料ホルダタイプ: FEI Polara cartridge |
撮影 | 電子線照射量: 21 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 詳細: Operated in super-resolution counting mode, dose fractionation |
画像スキャン | デジタル画像の数: 900 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 相対比: 1 |
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解析
EMソフトウェア | 名称: RELION / カテゴリ: 3次元再構成 | ||||||||||||
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CTF補正 | 詳細: Each particle | ||||||||||||
対称性 | 点対称性: C4 (4回回転対称) | ||||||||||||
3次元再構成 | 手法: Maximum likelihood / 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 36158 / ピクセルサイズ(公称値): 1.2156 Å / ピクセルサイズ(実測値): 1.2156 Å 詳細: The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are included but are not well defined by the experimental ...詳細: The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are included but are not well defined by the experimental density. Interatomic clashes between the ankyrin repeats and the C-terminal beta sheet are the result of poor geometry due to relatively poor experimental density in these regions. Resolution and averaging of DkTx density was insufficient to provide side chain geometry. The DkTx model was generated as a poly-ALA model based on hanatoxin (PDB entry 1D1H) and docked into the DkTx density with slight modification. (Single particle details: 3D classification, refinement, and reconstruction were performed using RELION) (Single particle--Applied symmetry: C4) Refinement type: HALF-MAPS REFINED INDEPENDENTLY / 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL 詳細: REFINEMENT PROTOCOL--de novo model building DETAILS--The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are ...詳細: REFINEMENT PROTOCOL--de novo model building DETAILS--The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are included but are not well defined by the experimental density. | ||||||||||||
精密化ステップ | サイクル: LAST
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