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データを開く
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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Tuna P-glycoprotein Apo Conformation 2 | |||||||||
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![]() | ABC Transporter / Membrane protein / TRANSPORT PROTEIN | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.98 Å | |||||||||
![]() | Young MA / Rees SD / Nicklisch SCT / Stowell M / Hamdoun A / Chang G | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM Structures of Apo and DDT-Bound P-Glycoprotein in Yellowfin Tuna. 著者: Megan A Young / Steven D Rees / Sascha C T Nicklisch / Michael H B Stowell / Amro Hamdoun / Geoffrey Chang / ![]() 要旨: Persistent pollutants in the ocean impact the safety of seafood. Many emerging and legacy persistent organic pollutants (POPs) have been disposed into the world's oceans, exemplified by the recent ...Persistent pollutants in the ocean impact the safety of seafood. Many emerging and legacy persistent organic pollutants (POPs) have been disposed into the world's oceans, exemplified by the recent discovery of large amounts of the halogenated pesticide dichlorodiphenyltrichloroethane (DDT) waste in the waters of Southern California. The biological mechanisms governing persistence and trophic transfer of marine pollutants into seafood species remain incompletely understood. Xenobiotic transporters, such as P-glycoprotein (P-gp), are present in all organisms and prevent the accumulation of toxic chemicals. Our previous work has demonstrated that halogenated marine pollutants can act as inhibitors of human and murine P-gp transporters by interacting with their binding site and impeding transport. Using cryo-EM, we determined the molecular interactions of DDT with P-glycoprotein from yellowfin tuna (). The results reveal that the conformation of the transporter samples multiple degrees of widening in the absence of substrate. We also show that DDT binds in a singular, wide inward-facing conformation that could inhibit the transport cycle. This transporter inhibition may contribute to the bioaccumulation of DDT in tuna. This study highlights the capacity of persistent organic pollutants to act at multiple points in the food chain to inhibit this critical transport mechanism. | |||||||||
履歴 |
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構造の表示
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 14.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 18.4 KB 18.4 KB | 表示 表示 | ![]() |
画像 | ![]() | 60.2 KB | ||
Filedesc metadata | ![]() | 7.2 KB | ||
その他 | ![]() ![]() | 14.5 MB 14.5 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.87 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
ファイル | emd_49367_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_49367_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : ABC transporter from yellowfin tuna
全体 | 名称: ABC transporter from yellowfin tuna |
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要素 |
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-超分子 #1: ABC transporter from yellowfin tuna
超分子 | 名称: ABC transporter from yellowfin tuna / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 1.43 MDa |
-分子 #1: Permeability Glycoprotein (P-gp)
分子 | 名称: Permeability Glycoprotein (P-gp) / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 144.6805 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MEGKEEMEML ANAKPHKNGG LREVKDEDDK KTGEKKKEKG AKLPMVGPLA LFRFADGKDI VLIFMGTVMS VAHGAVLPLM CIVFGDMTD SFIKDSMTSH IQITQITNPQ FTFTYPQSTL QEDMQSFAIY YSIMGFVVLV AAYMQVSFWA LAAGRQVRRI R KLFFHRIM ...文字列: MEGKEEMEML ANAKPHKNGG LREVKDEDDK KTGEKKKEKG AKLPMVGPLA LFRFADGKDI VLIFMGTVMS VAHGAVLPLM CIVFGDMTD SFIKDSMTSH IQITQITNPQ FTFTYPQSTL QEDMQSFAIY YSIMGFVVLV AAYMQVSFWA LAAGRQVRRI R KLFFHRIM QQDIGWFDVN ETGELNTRLT DDVYKIQEGI GDKVGMLIQA FSTFITSFII GFVKGWKLTL VILAVSPALG IS AAIFGKV LTNFTAKEQT AYAKAGAVAE EVLSAIRTVF AFSGQDREIK RYHKNLEDAK NMGIKKAISA NIAMGFTFLM IYL SYALAF WYGSILIMSK EYTIGTVLTV FFVVLIGAFT MGQTSPNIQS FASARGAAHK VYSIIDNQPC IDSYSDAGFK PDSI KGNIE FRNIHFNYPS RPDVKILNNM SLSVKSGQTI ALVGSSGCGK STTIQLLQRF YDPQEGSVSI DTHDIRSLNV RYLRE MIGV VSQEPILFAT TIAENIKYGR PDVTQQEIEQ AAKEANAYDF IMNLPDKFET LVGDRGTQMS GGQKQRIAIA RALVRN PKI LLLDEATSAL DAESETIVQA ALDKVRLGRT TIVVAHRLST IRNADVIAGF HKGDVIELGT HSQLMEKQGV YYTLVTM QT FQQVEDGEES EYEQAEDEKS PSVKSFSQSS LYRRKSTRGS SFAGSEGERE EKEKLRDVTD RAEEDENVPP VSFLKVMR L NLSEWPYMAL GTFCAIINGM MQPLFAVIFS KIIAVFAEPN QEIVRQKSEF FSLMFAAIGG VTFVTMFLQG FCFGKSGEL LTLKLRLGAF KSMMRQDLGW FDNPKNSVGA LTTRLATDAA QVQGATGVRM ATLAQNIANL GTSIIISFVY GWELTLLILS VVPIMAVAG SVQMQLLAGH AAEDKKELEK AGKIATEAIE NIRTVASLTR EPKFESLYQE NLHVPYKNSQ KKAHVYGFTF S FSQAMIYF AYAGCFRFGA WLIKEGRMDA EGVYLVISAV LFGAMAVGEA NSFTPNYAKA KMSASHLMML MNREPAIDNL SE EGQSPDK FDGNVRFEGV KFNYPSRPEV PILRGLNLKV SKGETLALVG SSGCGKSTTI QLLERFYDPM HGKVELDGIS AKQ LNIHWL RSQIGIVSQE PVLFDCTLAE NIAYGDNSRT VTLEEIQAAA KAANIHSFIE NLPQGYDTQA GDKGTQLSGG QKQR IAIAR AILRNPKLLL LDEATSALDT ESEKVVQEAL DQASRGRTCI VVAHRLSTIQ NADRIAVFQA GVVVEQGTHQ QLLAK KGIY SMLVNTQMGH ERNCIDHHHH HH |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | 2D array |
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試料調製
濃度 | 1 mg/mL | |||||||||||||||
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緩衝液 | pH: 8 構成要素:
詳細: 50 mM HEPES pH 8, 150 mM NaCl, 0.02% LMNG, 1mM MgCl2 | |||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 95 % / チャンバー内温度: 277 K / 装置: SPT LABTECH CHAMELEON 詳細: The grids were glow discharged for 80sec at 12mA, with a relative humidity of 82% and temperature 21.5oC maintained throughout preparation. Samples of purified protein were concentrated to ...詳細: The grids were glow discharged for 80sec at 12mA, with a relative humidity of 82% and temperature 21.5oC maintained throughout preparation. Samples of purified protein were concentrated to 1mg/mL and ultracentrifuged in a Beckmann Optima Ultracentrifuge for 15 minutes prior to grid preparation. The sample was applied via 2-S application mode by the Chameleon, allowed to wick for 530ms via the grid nanowires, and subsequently plunged into liquid ethane maintained at -180oC.. | |||||||||||||||
詳細 | Vitrified, monodisperse sample of transporter proteins in detergent micelles |
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電子顕微鏡法
顕微鏡 | TFS KRIOS |
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撮影 | フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 平均電子線量: 55.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2.0 µm / 最小 デフォーカス(公称値): 1.0 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
初期モデル | Chain - Source name: AlphaFold / Chain - Initial model type: in silico model 詳細: The initial model was predicted using AlphaFold 2 software. |
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精密化 | 空間: REAL / プロトコル: RIGID BODY FIT / 温度因子: 95 |
得られたモデル | ![]() PDB-9nfj: |