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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: 8y8s | |||||||||
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タイトル | Cryo-EM structure of AQP3 in DMPC nanodisc | |||||||||
![]() | Aquaporin-3 | |||||||||
![]() | MEMBRANE PROTEIN / water channel / aquaporin / aquaglyceroporin / glycerol | |||||||||
機能・相同性 | ![]() positive regulation of immune system process / polyol transmembrane transporter activity / polyol transmembrane transport / Passive transport by Aquaporins / renal water absorption / urea transport / glycerol channel activity / glycerol transmembrane transport / water transport / water channel activity ...positive regulation of immune system process / polyol transmembrane transporter activity / polyol transmembrane transport / Passive transport by Aquaporins / renal water absorption / urea transport / glycerol channel activity / glycerol transmembrane transport / water transport / water channel activity / Vasopressin regulates renal water homeostasis via Aquaporins / odontogenesis / response to retinoic acid / response to ischemia / establishment of localization in cell / cell-cell junction / basolateral plasma membrane / cellular response to hypoxia / identical protein binding / plasma membrane / cytoplasm 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: 3.03 Å | |||||||||
![]() | Kozai, D. / Suzuki, S. / Kamegawa, A. / Nishikawa, K. / Suzuki, H. / Fujiyoshi, Y. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Narrowed pore conformations of aquaglyceroporins AQP3 and GlpF. 著者: Daisuke Kozai / Masao Inoue / Shota Suzuki / Akiko Kamegawa / Kouki Nishikawa / Hiroshi Suzuki / Toru Ekimoto / Mitsunori Ikeguchi / Yoshinori Fujiyoshi / ![]() 要旨: Aquaglyceroporins such as aquaporin-3 (AQP3) and its bacterial homologue GlpF facilitate water and glycerol permeation across lipid bilayers. X-ray crystal structures of GlpF showed open pore ...Aquaglyceroporins such as aquaporin-3 (AQP3) and its bacterial homologue GlpF facilitate water and glycerol permeation across lipid bilayers. X-ray crystal structures of GlpF showed open pore conformations, and AQP3 has also been predicted to adopt this conformation. Here we present cryo-electron microscopy structures of rat AQP3 and GlpF in different narrowed pore conformations. In n-dodecyl-β-D-maltopyranoside detergent micelles, aromatic/arginine constriction filter residues of AQP3 containing Tyr212 form a 2.8-Å diameter pore, whereas in 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) nanodiscs, Tyr212 inserts into the pore. Molecular dynamics simulation shows the Tyr212-in conformation is stable and largely suppresses water permeability. AQP3 reconstituted in POPC liposomes exhibits water and glycerol permeability, suggesting that the Tyr212-in conformation may be altered during permeation. AQP3 Y212F and Y212T mutant structures suggest that the aromatic residue drives the pore-inserted conformation. The aromatic residue is conserved in AQP7 and GlpF, but neither structure exhibits the AQP3-like conformation in POPC nanodiscs. Unexpectedly, the GlpF pore is covered by an intracellular loop, but the loop is flexible and not primarily related to the GlpF permeability. Our findings illuminate the unique AQP3 conformation and structural diversity of aquaglyceroporins. | |||||||||
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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 | ![]() | 194 KB | 表示 | ![]() |
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PDB形式 | ![]() | 154.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-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
関連構造データ | ![]() 39057MC ![]() 8y8nC ![]() 8y8oC ![]() 8y8pC ![]() 8y8qC ![]() 8y8rC ![]() 8y8vC ![]() 8y8wC ![]() 8y8xC 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: 33522.938 Da / 分子数: 4 / 由来タイプ: 組換発現 / 詳細: 2-9 His tag 14-19 thrombin digestion site / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P47862 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: Tetramer of AQP3 in DMPC nanodisc / 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: 7.5 |
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
顕微鏡 | モデル: JEOL CRYO ARM 300 |
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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): 2500 nm / 最小 デフォーカス(公称値): 500 nm |
撮影 | 電子線照射量: 63.4 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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対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.03 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 228009 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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