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基本情報
登録情報 | データベース: PDB / ID: 7ykr | |||||||||||||||
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タイトル | Structure of TRPA1 in Drosophila melanogaster in a state with 17 ankyrin repeats determined | |||||||||||||||
![]() | Transient receptor potential cation channel subfamily A member 1 | |||||||||||||||
![]() | MEMBRANE PROTEIN / ion channel / TRPA1 | |||||||||||||||
機能・相同性 | ![]() cellular response to pulsatile fluid shear stress / temperature compensation of the circadian clock / negative phototaxis / detection of hot stimulus involved in thermoception / TRP channels / neuronal signal transduction / thermosensory behavior / temperature-gated cation channel activity / mechanosensory behavior / detection of chemical stimulus involved in sensory perception of bitter taste ...cellular response to pulsatile fluid shear stress / temperature compensation of the circadian clock / negative phototaxis / detection of hot stimulus involved in thermoception / TRP channels / neuronal signal transduction / thermosensory behavior / temperature-gated cation channel activity / mechanosensory behavior / detection of chemical stimulus involved in sensory perception of bitter taste / detection of chemical stimulus involved in sensory perception of pain / thermotaxis / detection of temperature stimulus involved in thermoception / cation channel complex / ligand-gated monoatomic ion channel activity / monoatomic cation transmembrane transport / detection of temperature stimulus involved in sensory perception of pain / response to light stimulus / monoatomic cation transport / phototransduction / monoatomic cation channel activity / positive regulation of calcium-mediated signaling / calcium channel activity / calcium ion transport / cellular response to heat / response to heat / 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: 3.2 Å | |||||||||||||||
![]() | Sun, L. / Liu, X. / Yang, Z. / Wang, X. | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Molecular architecture and gating mechanisms of the Drosophila TRPA1 channel. 著者: Xiaofei Wang / Yawen Li / Hong Wei / Zhisen Yang / Rui Luo / Yongxiang Gao / Wei Zhang / Xin Liu / Linfeng Sun / ![]() 要旨: The transient receptor potential channel subfamily A member 1 (TRPA1) ion channel is an evolutionary conserved polymodal sensor responding to noxious temperature or chemical stimuli. Notably, the ...The transient receptor potential channel subfamily A member 1 (TRPA1) ion channel is an evolutionary conserved polymodal sensor responding to noxious temperature or chemical stimuli. Notably, the thermosensitivity of TRPA1 varies among different species or even different isoforms in the same species. However, the underlying molecular basis of its thermo-gating remains largely unknown. Here, we determine the structures of a heat-sensitive isoform of TRPA1 in Drosophila melanogaster in two distinct conformations with cryo-samples prepared at 8 °C. Large conformational changes are observed in the ankyrin repeat domain (ARD) and the coiled-coil domain between the two states. Remarkably, all 17 ankyrin repeats are mapped in the newly resolved conformation, forming a propeller-like architecture. Two intersubunit interfaces are identified in the amino (N)-terminal domain, and play vital roles during both heat and chemical activation as shown by electrophysiological analysis. With cryo-samples prepared at 35 °C, only one conformation is resolved, suggesting possible state transitions during heat responses. These findings provide a basis for further understanding how the ARD regulates channel functions, and insights into the gating mechanism of TRPA1. | |||||||||||||||
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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 | ![]() | 707.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 572.6 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
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-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 107.5 KB | 表示 | |
CIF形式データ | ![]() | 167.2 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 | ![]() 33895MC ![]() 7yksC 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: 135324.359 Da / 分子数: 4 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: TrpA1, Anktm1, CG5751 / プラスミド: pEG BacMam / 発現宿主: ![]() 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: Homotetramer of dTRPA1 / タイプ: COMPLEX / Entity ID: all / 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: 7.4 |
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: DIFFRACTION / 最大 デフォーカス(公称値): 2300 nm / 最小 デフォーカス(公称値): 1500 nm |
撮影 | 電子線照射量: 50 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: NONE |
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3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 74515 / 対称性のタイプ: POINT |