- EMDB-6267: Human TRPA1 ion channel with agonist AITC -
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IDまたはキーワード:
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基本情報
登録情報
データベース: EMDB / ID: EMD-6267
タイトル
Human TRPA1 ion channel with agonist AITC
マップデータ
Reconstruction of hTRPA1 treated with AITC comprising summed half-maps, unfiltered and unsharpened. Two associated maps are low-pass-filtered and negative-B-factor-sharpened.
試料
試料: Recombinant human TRPA1 treated with AITC
タンパク質・ペプチド: TRPA1
キーワード
TRPA1 / TRP / ion channel
機能・相同性
機能・相同性情報
cellular response to food / temperature-gated cation channel activity / stereocilium bundle / detection of chemical stimulus involved in sensory perception of pain / thermoception / TRP channels / response to pain / detection of maltose stimulus / maltose transport complex / intracellularly gated calcium channel activity ...cellular response to food / temperature-gated cation channel activity / stereocilium bundle / detection of chemical stimulus involved in sensory perception of pain / thermoception / TRP channels / response to pain / detection of maltose stimulus / maltose transport complex / intracellularly gated calcium channel activity / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / maltose transport / maltodextrin transmembrane transport / detection of mechanical stimulus involved in sensory perception of pain / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / monoatomic ion transport / sensory perception of pain / ATP-binding cassette (ABC) transporter complex / response to cold / cell chemotaxis / calcium ion transmembrane transport / calcium channel activity / cellular response to hydrogen peroxide / intracellular calcium ion homeostasis / outer membrane-bounded periplasmic space / channel activity / protein homotetramerization / periplasmic space / cell surface receptor signaling pathway / response to xenobiotic stimulus / DNA damage response / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
: / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. ...: / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein 類似検索 - ドメイン・相同性
Transient receptor potential cation channel subfamily A member 1 / Maltose/maltodextrin-binding periplasmic protein 類似検索 - 構成要素
ジャーナル: Nature / 年: 2015 タイトル: Structure of the TRPA1 ion channel suggests regulatory mechanisms. 著者: Candice E Paulsen / Jean-Paul Armache / Yuan Gao / Yifan Cheng / David Julius / 要旨: The TRPA1 ion channel (also known as the wasabi receptor) is a detector of noxious chemical agents encountered in our environment or produced endogenously during tissue injury or drug metabolism. ...The TRPA1 ion channel (also known as the wasabi receptor) is a detector of noxious chemical agents encountered in our environment or produced endogenously during tissue injury or drug metabolism. These include a broad class of electrophiles that activate the channel through covalent protein modification. TRPA1 antagonists hold potential for treating neurogenic inflammatory conditions provoked or exacerbated by irritant exposure. Despite compelling reasons to understand TRPA1 function, structural mechanisms underlying channel regulation remain obscure. Here we use single-particle electron cryo- microscopy to determine the structure of full-length human TRPA1 to ∼4 Å resolution in the presence of pharmacophores, including a potent antagonist. Several unexpected features are revealed, including an extensive coiled-coil assembly domain stabilized by polyphosphate co-factors and a highly integrated nexus that converges on an unpredicted transient receptor potential (TRP)-like allosteric domain. These findings provide new insights into the mechanisms of TRPA1 regulation, and establish a blueprint for structure-based design of analgesic and anti-inflammatory agents.
EMPIAR-10024 (タイトル: Human TRPA1 ion channel with agonist AITC / Data size: 453.0 Data #1: TRP ion channel dataset [picked particles - single frame - processed])
ダウンロード / ファイル: emd_6267.map.gz / 形式: CCP4 / 大きさ: 100.6 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Reconstruction of hTRPA1 treated with AITC comprising summed half-maps, unfiltered and unsharpened. Two associated maps are low-pass-filtered and negative-B-factor-sharpened.
UniProtKB: Transient receptor potential cation channel subfamily A member 1
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
濃度
0.5 mg/mL
緩衝液
pH: 8 / 詳細: 20 mM HEPES, 150 mM NaCl, 1 mM DTT, 1 mM IP6
グリッド
詳細: 400 mesh holey carbon
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 120 K / 装置: FEI VITROBOT MARK I / 手法: Blot for 7 seconds before plunging.
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電子顕微鏡法
顕微鏡
FEI POLARA 300
詳細
Gatan K2 Summit in super-resolution counting mode. Motion correction as described in Li et al. (2013) Nature Methods.
日付
2014年7月18日
撮影
カテゴリ: CCD / フィルム・検出器のモデル: GATAN K2 (4k x 4k) / 実像数: 1160 / 平均電子線量: 21 e/Å2 詳細: Every image is the average of 30 frames recorded using the K2 Summit. The final reconstruction was calculated from images motion-corrected and weighted using the method described in Scheres, 2014.
Particles were selected using an automatic selection program and manually screened. Defocus was calculated using CTFFIND3 and data were processed and refined using RELION 1.3.
CTF補正
詳細: Each particle
最終 再構成
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 4.24 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: RELION / 使用した粒子像数: 43585