+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3iyz | ||||||
---|---|---|---|---|---|---|---|
タイトル | Structure of Aquaporin-4 S180D mutant at 10.0 A resolution from electron micrograph | ||||||
要素 | Aquaporin-4 | ||||||
キーワード | TRANSPORT PROTEIN / WATER TRANSPORT / WATER CHANNEL / AQUAPORIN / TWO-DIMENSIONAL CRYSTAL / MEMBRANE PROTEIN / BACULOVIRUS EXPRESSION SYSTEM / GLYCOPROTEIN / MEMBRANE / PHOSPHOPROTEIN / TRANSMEMBRANE / TRANSPORT | ||||||
機能・相同性 | 機能・相同性情報 Passive transport by Aquaporins / cerebrospinal fluid secretion / renal water absorption / regulation of vascular endothelial growth factor production / cerebrospinal fluid circulation / astrocyte end-foot / intracellular water homeostasis / water transport / negative regulation of cell adhesion molecule production / cell projection membrane ...Passive transport by Aquaporins / cerebrospinal fluid secretion / renal water absorption / regulation of vascular endothelial growth factor production / cerebrospinal fluid circulation / astrocyte end-foot / intracellular water homeostasis / water transport / negative regulation of cell adhesion molecule production / cell projection membrane / multicellular organismal-level water homeostasis / water channel activity / cellular response to interleukin-6 / Vasopressin regulates renal water homeostasis via Aquaporins / negative regulation of interleukin-1 beta production / negative regulation of interleukin-6 production / cellular response to interleukin-1 / response to glucocorticoid / T-tubule / basal plasma membrane / establishment of localization in cell / cellular response to estradiol stimulus / female pregnancy / cellular response to glucose stimulus / sensory perception of sound / carbon dioxide transport / sarcolemma / cellular response to type II interferon / cell-cell adhesion / cell-cell junction / basolateral plasma membrane / protein homotetramerization / endosome membrane / external side of plasma membrane / protein-containing complex / extracellular region / identical protein binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Rattus norvegicus (ドブネズミ) | ||||||
手法 | 電子線結晶学 / 分子置換 / クライオ電子顕微鏡法 / 解像度: 10 Å | ||||||
データ登録者 | Mitsuma, T. / Tani, K. / Hiroaki, Y. / Kamegawa, A. / Suzuki, H. / Hibino, H. / Kurachi, Y. / Fujiyoshi, Y. | ||||||
引用 | ジャーナル: J Mol Biol / 年: 2010 タイトル: Influence of the cytoplasmic domains of aquaporin-4 on water conduction and array formation. 著者: Tadanori Mitsuma / Kazutoshi Tani / Yoko Hiroaki / Akiko Kamegawa / Hiroshi Suzuki / Hiroshi Hibino / Yoshihisa Kurachi / Yoshinori Fujiyoshi / 要旨: Phosphorylation of Ser180 in cytoplasmic loop D has been shown to reduce the water permeability of aquaporin (AQP) 4, the predominant water channel in the brain. However, when the structure of the ...Phosphorylation of Ser180 in cytoplasmic loop D has been shown to reduce the water permeability of aquaporin (AQP) 4, the predominant water channel in the brain. However, when the structure of the S180D mutant (AQP4M23S180D), which was generated to mimic phosphorylated Ser180, was determined to 2.8 Å resolution using electron diffraction patterns, it showed no significant differences from the structure of the wild-type channel. High-resolution density maps usually do not resolve protein regions that are only partially ordered, but these can sometimes be seen in lower-resolution density maps calculated from electron micrographs. We therefore used images of two-dimensional crystals and determined the structure of AQP4M23S180D at 10 A resolution. The features of the 10-A density map are consistent with those of the previously determined atomic model; in particular, there were no indications of any obstruction near the cytoplasmic pore entrance. In addition, water conductance measurements, both in vitro and in vivo, show the same water permeability for wild-type and mutant AQP4M23, suggesting that the S180D mutation neither reduces water conduction through a conformational change nor reduces water conduction by interacting with a protein that would obstruct the cytoplasmic channel entrance. Finally, the 10-A map shows a cytoplasmic density in between four adjacent tetramers that most likely represents the association of four N termini. This finding supports the critical role of the N terminus of AQP4 in the stabilization of orthogonal arrays, as well as their interference through lipid modification of cysteine residues in the longer N-terminal isoform. | ||||||
履歴 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 3iyz.cif.gz | 23.3 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb3iyz.ent.gz | 8.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3iyz.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 3iyz_validation.pdf.gz | 661.9 KB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 3iyz_full_validation.pdf.gz | 661.5 KB | 表示 | |
XML形式データ | 3iyz_validation.xml.gz | 8.4 KB | 表示 | |
CIF形式データ | 3iyz_validation.cif.gz | 11.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/iy/3iyz ftp://data.pdbj.org/pub/pdb/validation_reports/iy/3iyz | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
| ||||||||
---|---|---|---|---|---|---|---|---|---|
1 |
| ||||||||
単位格子 |
|
-要素
#1: タンパク質 | 分子量: 36595.137 Da / 分子数: 1 / 断片: UNP RESIDUES 23-323 / 変異: YES / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Aqp4 / プラスミド: PBLUEBACHIS2B / 細胞株 (発現宿主): SF9 発現宿主: SPODOPTERA FRUGIPERDA (ツマジロクサヨトウ) 参照: UniProt: P47863 |
---|
-実験情報
-実験
実験 | 手法: 電子線結晶学 / 使用した結晶の数: 1 |
---|---|
EM実験 | 試料の集合状態: 2D ARRAY / 3次元再構成法: 電子線結晶学 |
-試料調製
構成要素 | 名称: rat aquaporin-4 S180D mutant / タイプ: COMPLEX / 詳細: tetramer. The sample was embedded into lipid. |
---|---|
分子量 | 値: 0.032 MDa / 実験値: NO |
緩衝液 | 名称: MES buffer / pH: 6 詳細: 10mM MES, 75mM NaCl, 50mM MgCl2, 2mM DTT, 1% glycerol, 7% trehalose |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: 10mM MES, 75mM NaCl, 50mM MgCl2, 2mM DTT, 1% glycerol, 7% trehalose |
試料支持 | 詳細: The molybdenum grids were covered with solid carbon |
急速凍結 | 装置: REICHERT-JUNG PLUNGER / 凍結剤: NITROGEN / 凍結前の試料温度: 277 K 手法: The grid was blotted with filter paper and plunged into liquid nitrogen. |
結晶化 | pH: 6 / 詳細: pH 6.00 |
-データ収集
顕微鏡 | モデル: JEOL KYOTO-3000SFF |
---|---|
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 90000 X / 最大 デフォーカス(公称値): 3730 nm / 最小 デフォーカス(公称値): 430 nm / Cs: 1.6 mm 非点収差: bjective lens astigmatism was corrected at 400,000 times magnification 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: Top entry liquid helium cooled cryo specimen holder 温度: 4.2 K / 傾斜角・最大: 60 ° / 傾斜角・最小: -60 ° |
撮影 | 電子線照射量: 38 e/Å2 / フィルム・検出器のモデル: GENERIC CCD / 詳細: Tietz 4K CCD |
回折 | 平均測定温度: 4.2 K |
検出器 | 日付: 2008年2月4日 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: electron |
放射波長 | 相対比: 1 |
-解析
ソフトウェア | 名称: MRC / 分類: データスケーリング | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EMソフトウェア |
| ||||||||||||
CTF補正 | 詳細: Each image | ||||||||||||
3次元再構成 | 手法: 2D-crystals / 解像度: 10 Å / 解像度の算出法: OTHER / ピクセルサイズ(公称値): 1.67 Å / 倍率補正: Each image / 詳細: MRC / 対称性のタイプ: 2D CRYSTAL | ||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / Target criteria: Cross-correlation coefficient / 詳細: REFINEMENT PROTOCOL--rigid body | ||||||||||||
原子モデル構築 | PDB-ID: 2ZZ9 | ||||||||||||
精密化 | 構造決定の手法: 分子置換 開始モデル: PDB entry 2ZZ9 最高解像度: 10 Å | ||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 10 Å
|