+データを開く
-基本情報
登録情報 | データベース: SASBDB / ID: SASDEE7 |
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試料 | Human TRPML2 Ion Channel Extracytosolic/Lumenal Domain at pH 6.5, 0.5 mM Calcium
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機能・相同性 | 機能・相同性情報 macrophage migration / positive regulation of macrophage inflammatory protein 1 alpha production / NAADP-sensitive calcium-release channel activity / iron ion transmembrane transporter activity / positive regulation of chemokine (C-C motif) ligand 5 production / neutrophil migration / positive regulation of monocyte chemotactic protein-1 production / positive regulation of chemokine (C-X-C motif) ligand 2 production / TRP channels / calcium ion transmembrane transport ...macrophage migration / positive regulation of macrophage inflammatory protein 1 alpha production / NAADP-sensitive calcium-release channel activity / iron ion transmembrane transporter activity / positive regulation of chemokine (C-C motif) ligand 5 production / neutrophil migration / positive regulation of monocyte chemotactic protein-1 production / positive regulation of chemokine (C-X-C motif) ligand 2 production / TRP channels / calcium ion transmembrane transport / calcium channel activity / recycling endosome membrane / protein transport / late endosome membrane / adaptive immune response / lysosome / innate immune response / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 |
生物種 | Homo sapiens (ヒト) |
引用 | ジャーナル: Structure / 年: 2019 タイトル: Structure of the Human TRPML2 Ion Channel Extracytosolic/Lumenal Domain. 著者: Kerstin K Viet / Annika Wagner / Kevin Schwickert / Nils Hellwig / Martha Brennich / Nicole Bader / Tanja Schirmeister / Nina Morgner / Hermann Schindelin / Ute A Hellmich / 要旨: TRPML2 is the least structurally characterized mammalian transient receptor potential mucolipin ion channel. The TRPML family hallmark is a large extracytosolic/lumenal domain (ELD) between ...TRPML2 is the least structurally characterized mammalian transient receptor potential mucolipin ion channel. The TRPML family hallmark is a large extracytosolic/lumenal domain (ELD) between transmembrane helices S1 and S2. We present crystal structures of the tetrameric human TRPML2 ELD at pH 6.5 (2.0 Å) and 4.5 (2.95 Å), corresponding to the pH values in recycling endosomes and lysosomes. Isothermal titration calorimetry shows Ca binding to the highly acidic central pre-pore loop which is abrogated at low pH, in line with a pH-dependent channel regulation model. Small angle X-ray scattering confirms the ELD dimensions in solution. Changes in pH or Ca concentration do not affect the protein's secondary structure, but can influence ELD oligomer integrity according to native mass spectrometry. Our data thus complete the set of high-resolution views of human TRPML channel ELDs and reveal some structural responses to the conditions the TRPML2 ELD encounters as the channel traffics through the endolysosomal system. |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-モデル
モデル #2590 | タイプ: atomic / ダミー原子の半径: 1.90 A / カイ2乗値: 0.94 / P-value: 0.375713 Omokage検索でこの集合体の類似形状データを探す (詳細) |
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モデル #2591 | タイプ: dummy / ダミー原子の半径: 1.80 A / カイ2乗値: 1.461 Omokage検索でこの集合体の類似形状データを探す (詳細) |
-試料
試料 | 名称: Human TRPML2 Ion Channel Extracytosolic/Lumenal Domain at pH 6.5, 0.5 mM Calcium 試料濃度: 0.55 mg/ml |
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バッファ | 名称: 10 mM Hepes, pH 6.5, 150 mM NaCl, 0.5 mM CaCl2 / pH: 6.5 |
要素 #1357 | 名称: TRPML2 / タイプ: protein / 記述: Transient receptor potential channel mucolipin 2 / 分子量: 23.354 / 分子数: 4 / 由来: Homo sapiens / 参照: UniProt: Q8IZK6 配列: GLSNQLVVAF KEDNTVAFKH LFLKGYSGTD EDDYSCSVYT QEDAYESIFF AINQYHQLKD ITLGTLGYGE NEDNRIGLKV CKQHYKKGTM FPSNETLNID NDVELDCVQL DLQDLSKKPP DWKNSSFFRL EFYRLLQVEI SFHLKGIDLQ TIHSRELPDC YVFQNTIIFD ...配列: GLSNQLVVAF KEDNTVAFKH LFLKGYSGTD EDDYSCSVYT QEDAYESIFF AINQYHQLKD ITLGTLGYGE NEDNRIGLKV CKQHYKKGTM FPSNETLNID NDVELDCVQL DLQDLSKKPP DWKNSSFFRL EFYRLLQVEI SFHLKGIDLQ TIHSRELPDC YVFQNTIIFD NKAHSGKIKI YFDSDAKIEE CKDLNIFGST QK |
-実験情報
ビーム | 設備名称: ESRF BM29 / 地域: Grenoble / 国: France / 線源: X-ray synchrotron / 波長: 0.099 Å / スペクトロメータ・検出器間距離: 2.849 mm | ||||||||||||||||||||||||||||||
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検出器 | 名称: Pilatus 1M / タイプ: Dectris / Pixsize x: 172 mm | ||||||||||||||||||||||||||||||
スキャン | タイトル: Human TRPML2 Ion Channel Extracytosolic/Lumenal Domain at pH 6.5, 0.5 mM Calcium 測定日: 2018年10月20日 / 保管温度: 20 °C / セル温度: 20 °C / 照射時間: 1 sec. / フレーム数: 1200 / 単位: 1/nm /
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距離分布関数 P(R) | ソフトウェア P(R): GNOM 5.0 / ポイント数: 480 /
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結果 | カーブのタイプ: sec コメント: The experimental mass was determined via correlated volume.
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