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基本情報
登録情報 | ![]() | ||||||||||||
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タイトル | Cryo-EM structure of nanodisc-embedded human ABCA1 | ||||||||||||
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機能・相同性 | ![]() signal release / sphingolipid floppase activity / regulation of high-density lipoprotein particle assembly / apolipoprotein A-I receptor activity / positive regulation of high-density lipoprotein particle assembly / Defective ABCA1 causes TGD / response to vitamin B3 / apolipoprotein A-I binding / platelet dense granule organization / intracellular cholesterol transport ...signal release / sphingolipid floppase activity / regulation of high-density lipoprotein particle assembly / apolipoprotein A-I receptor activity / positive regulation of high-density lipoprotein particle assembly / Defective ABCA1 causes TGD / response to vitamin B3 / apolipoprotein A-I binding / platelet dense granule organization / intracellular cholesterol transport / high-density lipoprotein particle binding / phospholipid transporter activity / protein transmembrane transport / response to laminar fluid shear stress / floppase activity / HDL assembly / phosphatidylserine floppase activity / cellular response to cholesterol / peptide secretion / phosphatidylcholine floppase activity / phospholipid homeostasis / phosphatidylcholine binding / phospholipid efflux / export across plasma membrane / reverse cholesterol transport / cholesterol transfer activity / high-density lipoprotein particle assembly / lipoprotein biosynthetic process / P-type phospholipid transporter / regulation of Cdc42 protein signal transduction / phospholipid translocation / syntaxin binding / cholesterol efflux / endosomal transport / phagocytosis, engulfment / intracellular vesicle / lysosome organization / cholesterol binding / negative regulation of cholesterol storage / cellular response to cytokine stimulus / apolipoprotein binding / negative regulation of macrophage derived foam cell differentiation / cellular response to low-density lipoprotein particle stimulus / protein secretion / endocytic vesicle / ATPase-coupled transmembrane transporter activity / protein transmembrane transporter activity / positive regulation of cholesterol efflux / ABC-type transporter activity / cellular response to retinoic acid / NR1H3 & NR1H2 regulate gene expression linked to cholesterol transport and efflux / phagocytic vesicle / cholesterol metabolic process / cholesterol homeostasis / adenylate cyclase-activating G protein-coupled receptor signaling pathway / PPARA activates gene expression / small GTPase binding / cellular response to xenobiotic stimulus / ATPase binding / basolateral plasma membrane / cellular response to lipopolysaccharide / endosome / membrane raft / G protein-coupled receptor signaling pathway / external side of plasma membrane / intracellular membrane-bounded organelle / signaling receptor binding / endoplasmic reticulum membrane / perinuclear region of cytoplasm / Golgi apparatus / ATP hydrolysis activity / ATP binding / plasma membrane 類似検索 - 分子機能 | ||||||||||||
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: 4.0 Å | ||||||||||||
![]() | Plummer AM / Culbertson AT / Morales-Perez CL / Liao M | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Activity and Structural Dynamics of Human ABCA1 in a Lipid Membrane. 著者: Ashlee M Plummer-Medeiros / Alan T Culbertson / Claudio L Morales-Perez / Maofu Liao / ![]() ![]() 要旨: The human ATP-binding cassette (ABC) transporter ABCA1 plays a critical role in lipid homeostasis as it extracts sterols and phospholipids from the plasma membrane for excretion to the extracellular ...The human ATP-binding cassette (ABC) transporter ABCA1 plays a critical role in lipid homeostasis as it extracts sterols and phospholipids from the plasma membrane for excretion to the extracellular apolipoprotein A-I and subsequent formation of high-density lipoprotein (HDL) particles. Deleterious mutations of ABCA1 lead to sterol accumulation and are associated with atherosclerosis, poor cardiovascular outcomes, cancer, and Alzheimer's disease. The mechanism by which ABCA1 drives lipid movement is poorly understood, and a unified platform to produce active ABCA1 protein for both functional and structural studies has been missing. In this work, we established a stable expression system for both a human cell-based sterol export assay and protein purification for in vitro biochemical and structural studies. ABCA1 produced in this system was active in sterol export and displayed enhanced ATPase activity after reconstitution into a lipid bilayer. Our single-particle cryo-EM study of ABCA1 in nanodiscs showed protein induced membrane curvature, revealed multiple distinct conformations, and generated a structure of nanodisc-embedded ABCA1 at 4.0-Å resolution representing a previously unknown conformation. Comparison of different ABCA1 structures and molecular dynamics simulations demonstrates both concerted domain movements and conformational variations within each domain. Taken together, our platform for producing and characterizing ABCA1 in a lipid membrane enabled us to gain important mechanistic and structural insights and paves the way for investigating modulators that target the functions of ABCA1. | ||||||||||||
履歴 |
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構造の表示
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マップデータ | ![]() | 59.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 16.8 KB 16.8 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 11.7 KB | 表示 | ![]() |
画像 | ![]() | 91.2 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 618.8 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 618.4 KB | 表示 | |
XML形式データ | ![]() | 10.8 KB | 表示 | |
CIF形式データ | ![]() | 14.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 7tdtMC M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.24 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
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試料の構成要素
-全体 : Human ABCA1 reconstituted into nanodiscs
全体 | 名称: Human ABCA1 reconstituted into nanodiscs |
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要素 |
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-超分子 #1: Human ABCA1 reconstituted into nanodiscs
超分子 | 名称: Human ABCA1 reconstituted into nanodiscs / タイプ: organelle_or_cellular_component / 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 #1: Phospholipid-transporting ATPase ABCA1
分子 | 名称: Phospholipid-transporting ATPase ABCA1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO / EC番号: P-type phospholipid transporter |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 255.391797 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: GGGASEFVDM ACWPQLRLLL WKNLTFRRRQ TCQLLLEVAW PLFIFLILIS VRLSYPPYEQ HECHFPNKAM PSAGTLPWVQ GIICNANNP CFRYPTPGEA PGVVGNFNKS IVARLFSDAR RLLLYSQKDT SMKDMRKVLR TLQQIKKSSS NLKLQDFLVD N ETFSGFLY ...文字列: GGGASEFVDM ACWPQLRLLL WKNLTFRRRQ TCQLLLEVAW PLFIFLILIS VRLSYPPYEQ HECHFPNKAM PSAGTLPWVQ GIICNANNP CFRYPTPGEA PGVVGNFNKS IVARLFSDAR RLLLYSQKDT SMKDMRKVLR TLQQIKKSSS NLKLQDFLVD N ETFSGFLY HNLSLPKSTV DKMLRADVIL HKVFLQGYQL HLTSLCNGSK SEEMIQLGDQ EVSELCGLPR EKLAAAERVL RS NMDILKP ILRTLNSTSP FPSKELAEAT KTLLHSLGTL AQELFSMRSW SDMRQEVMFL TNVNSSSSST QIYQAVSRIV CGH PEGGGL KIKSLNWYED NNYKALFGGN GTEEDAETFY DNSTTPYCND LMKNLESSPL SRIIWKALKP LLVGKILYTP DTPA TRQVM AEVNKTFQEL AVFHDLEGMW EELSPKIWTF MENSQEMDLV RMLLDSRDND HFWEQQLDGL DWTAQDIVAF LAKHP EDVQ SSNGSVYTWR EAFNETNQAI RTISRFMECV NLNKLEPIAT EVWLINKSME LLDERKFWAG IVFTGITPGS IELPHH VKY KIRMDIDNVE RTNKIKDGYW DPGPRADPFE DMRYVWGGFA YLQDVVEQAI IRVLTGTEKK TGVYMQQMPY PCYVDDI FL RVMSRSMPLF MTLAWIYSVA VIIKGIVYEK EARLKETMRI MGLDNSILWF SWFISSLIPL LVSAGLLVVI LKLGNLLP Y SDPSVVFVFL SVFAVVTILQ CFLISTLFSR ANLAAACGGI IYFTLYLPYV LCVAWQDYVG FTLKIFASLL SPVAFGFGC EYFALFEEQG IGVQWDNLFE SPVEEDGFNL TTSVSMMLFD TFLYGVMTWY IEAVFPGQYG IPRPWYFPCT KSYWFGEESD EKSHPGSNQ KRISEICMEE EPTHLKLGVS IQNLVKVYRD GMKVAVDGLA LNFYEGQITS FLGHNGAGKT TTMSILTGLF P PTSGTAYI LGKDIRSEMS TIRQNLGVCP QHNVLFDMLT VEEHIWFYAR LKGLSEKHVK AEMEQMALDV GLPSSKLKSK TS QLSGGMQ RKLSVALAFV GGSKVVILDE PTAGVDPYSR RGIWELLLKY RQGRTIILST HHMDEADVLG DRIAIISHGK LCC VGSSLF LKNQLGTGYY LTLVKKDVES SLSSCRNSSS TVSYLKKEDS VSQSSSDAGL GSDHESDTLT IDVSAISNLI RKHV SEARL VEDIGHELTY VLPYEAAKEG AFVELFHEID DRLSDLGISS YGISETTLEE IFLKVAEESG VDAETSDGTL PARRN RRAF GDKQSCLRPF TEDDAADPND SDIDPESRET DLLSGMDGKG SYQVKGWKLT QQQFVALLWK RLLIARRSRK GFFAQI VLP AVFVCIALVF SLIVPPFGKY PSLELQPWMY NEQYTFVSND APEDTGTLEL LNALTKDPGF GTRCMEGNPI PDTPCQA GE EEWTTAPVPQ TIMDLFQNGN WTMQNPSPAC QCSSDKIKKM LPVCPPGAGG LPPPQRKQNT ADILQDLTGR NISDYLVK T YVQIIAKSLK NKIWVNEFRY GGFSLGVSNT QALPPSQEVN DAIKQMKKHL KLAKDSSADR FLNSLGRFMT GLDTKNNVK VWFNNKGWHA ISSFLNVINN AILRANLQKG ENPSHYGITA FNHPLNLTKQ QLSEVALMTT SVDVLVSICV IFAMSFVPAS FVVFLIQER VSKAKHLQFI SGVKPVIYWL SNFVWDMCNY VVPATLVIII FICFQQKSYV SSTNLPVLAL LLLLYGWSIT P LMYPASFV FKIPSTAYVV LTSVNLFIGI NGSVATFVLE LFTDNKLNNI NDILKSVFLI FPHFCLGRGL IDMVKNQAMA DA LERFGEN RFVSPLSWDL VGRNLFAMAV EGVVFFLITV LIQYRFFIRP RPVNAKLSPL NDEDEDVRRE RQRILDGGGQ NDI LEIKEL TKIYRRKRKP AVDRICVGIP PGECFGLLGV NGAGKSSTFK MLTGDTTVTR GDAFLNKNSI LSNIHEVHQN MGYC PQFDA ITELLTGREH VEFFALLRGV PEKEVGKVGE WAIRKLGLVK YGEKYAGNYS GGNKRKLSTA MALIGGPPVV FLDEP TTGM DPKARRFLWN CALSVVKEGR SVVLTSHSME ECEALCTRMA IMVNGRFRCL GSVQHLKNRF GDGYTIVVRI AGSNPD LKP VQDFFGLAFP GSVLKEKHRN MLQYQLPSSL SSLARIFSIL SQSKKRLHIE DYSVSQTTLD QVFVNFAKDQ SDDDHLK DL SLHKNQTVVD VAVLTSFLQD EKVKESYV |
-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 | particle |
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試料調製
濃度 | 0.8 mg/mL | ||||||||||||
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緩衝液 | pH: 8 構成要素:
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / メッシュ: 400 / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 30 sec. / 前処理 - 雰囲気: AIR | ||||||||||||
凍結 | 凍結剤: ETHANE | ||||||||||||
詳細 | Homogeneous, monodisperse sample of ABCA1 in nanodiscs |
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電子顕微鏡法 #1
Microscopy ID | 1 |
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顕微鏡 | FEI TITAN KRIOS |
撮影 | Image recording ID: 1 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 1.04 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | C2レンズ絞り径: 50.0 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 最大 デフォーカス(公称値): 2.5 µm / 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 105000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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電子顕微鏡法 #1~
Microscopy ID | 1 |
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顕微鏡 | FEI TALOS ARCTICA |
撮影 | Image recording ID: 2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 1.07 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 最大 デフォーカス(公称値): 3.5 µm / 最小 デフォーカス(公称値): 1.5 µm / 倍率(公称値): 36000 |
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |