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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Lecithin:Cholesterol Acyltransferase Bound to Apolipoprotein A-I dimer in HDL | |||||||||
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![]() | Complex / Lecithin:Cholesterol Acyltransferase / Apolipoprotein A-I / HDL / LIPID TRANSPORT | |||||||||
機能・相同性 | ![]() phosphatidylcholine-sterol O-acyltransferase / phosphatidylcholine-sterol O-acyltransferase activity / regulation of high-density lipoprotein particle assembly / platelet-activating factor acetyltransferase activity / Defective ABCA1 causes TGD / high-density lipoprotein particle receptor binding / HDL clearance / sterol ester esterase activity / spherical high-density lipoprotein particle / 1-alkyl-2-acetylglycerophosphocholine esterase ...phosphatidylcholine-sterol O-acyltransferase / phosphatidylcholine-sterol O-acyltransferase activity / regulation of high-density lipoprotein particle assembly / platelet-activating factor acetyltransferase activity / Defective ABCA1 causes TGD / high-density lipoprotein particle receptor binding / HDL clearance / sterol ester esterase activity / spherical high-density lipoprotein particle / 1-alkyl-2-acetylglycerophosphocholine esterase / Scavenging by Class B Receptors / positive regulation of hydrolase activity / negative regulation of response to cytokine stimulus / 1-alkyl-2-acetylglycerophosphocholine esterase activity / protein oxidation / regulation of intestinal cholesterol absorption / apolipoprotein A-I binding / vitamin transport / cholesterol import / blood vessel endothelial cell migration / high-density lipoprotein particle binding / negative regulation of heterotypic cell-cell adhesion / ABC transporters in lipid homeostasis / apolipoprotein A-I receptor binding / apolipoprotein receptor binding / negative regulation of cytokine production involved in immune response / negative regulation of cell adhesion molecule production / HDL assembly / negative regulation of very-low-density lipoprotein particle remodeling / peptidyl-methionine modification / phosphatidylcholine metabolic process / phosphatidylcholine biosynthetic process / very-low-density lipoprotein particle remodeling / glucocorticoid metabolic process / acylglycerol homeostasis / phosphatidylcholine-sterol O-acyltransferase activator activity / positive regulation of phospholipid efflux / Chylomicron remodeling / positive regulation of cholesterol metabolic process / cellular response to lipoprotein particle stimulus / Chylomicron assembly / : / high-density lipoprotein particle clearance / chylomicron / phospholipid efflux / high-density lipoprotein particle remodeling / phospholipid homeostasis / reverse cholesterol transport / chemorepellent activity / high-density lipoprotein particle assembly / lipid storage / low-density lipoprotein particle / lipoprotein biosynthetic process / cholesterol transfer activity / cholesterol transport / high-density lipoprotein particle / very-low-density lipoprotein particle / regulation of Cdc42 protein signal transduction / triglyceride homeostasis / endothelial cell proliferation / HDL remodeling / cholesterol efflux / Scavenging by Class A Receptors / negative regulation of interleukin-1 beta production / adrenal gland development / negative chemotaxis / cholesterol binding / cholesterol biosynthetic process / positive regulation of Rho protein signal transduction / amyloid-beta formation / endocytic vesicle / positive regulation of cholesterol efflux / negative regulation of tumor necrosis factor-mediated signaling pathway / Scavenging of heme from plasma / Retinoid metabolism and transport / positive regulation of phagocytosis / positive regulation of stress fiber assembly / phospholipid metabolic process / heat shock protein binding / positive regulation of substrate adhesion-dependent cell spreading / endocytic vesicle lumen / cholesterol metabolic process / cholesterol homeostasis / integrin-mediated signaling pathway / Post-translational protein phosphorylation / Heme signaling / PPARA activates gene expression / phospholipid binding / lipid metabolic process / negative regulation of inflammatory response / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / Platelet degranulation / extracellular vesicle / amyloid-beta binding / cytoplasmic vesicle / : / secretory granule lumen / blood microparticle / early endosome / protein stabilization 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: 9.8 Å | |||||||||
![]() | Coleman B / Bedi S / Hill JH / Morris J / Manthei KA / Hart RC / He Y / Shah AS / Jerome WG / Vaisar T ...Coleman B / Bedi S / Hill JH / Morris J / Manthei KA / Hart RC / He Y / Shah AS / Jerome WG / Vaisar T / Bornfeldt KE / Song H / Segrest JP / Heinecke JW / Aller SG / Tesmer JJG / Davidson S | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Lecithin:cholesterol acyltransferase binds a discontinuous binding site on adjacent apolipoprotein A-I belts in HDL. 著者: Bethany Coleman / Shimpi Bedi / John H Hill / Jamie Morris / Kelly A Manthei / Rachel C Hart / Yi He / Amy S Shah / W Gray Jerome / Tomas Vaisar / Karin E Bornfeldt / Hyun Song / Jere P ...著者: Bethany Coleman / Shimpi Bedi / John H Hill / Jamie Morris / Kelly A Manthei / Rachel C Hart / Yi He / Amy S Shah / W Gray Jerome / Tomas Vaisar / Karin E Bornfeldt / Hyun Song / Jere P Segrest / Jay W Heinecke / Stephen G Aller / John J G Tesmer / W Sean Davidson / ![]() 要旨: Lecithin:cholesterol acyltransferase (LCAT) is a high-density lipoprotein (HDL) modifying protein that profoundly affects the composition and function of HDL subspecies. The cholesterol ...Lecithin:cholesterol acyltransferase (LCAT) is a high-density lipoprotein (HDL) modifying protein that profoundly affects the composition and function of HDL subspecies. The cholesterol esterification activity of LCAT is dramatically increased by apolipoprotein A-I (APOA1) on HDL, but the mechanism remains unclear. Using site-directed mutagenesis, cross-linking, mass spectrometry, electron microscopy, protein engineering, and molecular docking, we identified two LCAT binding sites formed by helices 4 and 6 from two antiparallel APOA1 molecules in HDL. Although the reciprocating APOA1 "belts" form two ostensibly symmetrical binding locations, LCAT can adopt distinct orientations at each site, as shown by our 9.8 Å cryoEM envelope. In one case, LCAT membrane binding domains align with the APOA1 belts and, in the other, the HDL phospholipids. By introducing disulfide bonds between the APOA1 helical domains, we demonstrated that LCAT does not require helical separation during its reaction cycle. This indicates that LCAT, anchored to APOA1 belts, accesses substrates and deposits products through interactions with the planar lipid surface. This model of the LCAT/APOA1 interaction provides insights into how LCAT and possibly other HDL-modifying factors engage the APOA1 scaffold, offering potential strategies to enhance LCAT activity in individuals with genetic defects. | |||||||||
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構造の表示
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-EMDBアーカイブ
マップデータ | ![]() | 5.5 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 21.1 KB 21.1 KB | 表示 表示 | ![]() |
画像 | ![]() | 32.8 KB | ||
Filedesc metadata | ![]() | 6.7 KB | ||
その他 | ![]() ![]() | 7 MB 7 MB | ||
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 | ![]() 9mxzMC 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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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: 1.96 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: #1
ファイル | emd_48724_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: #2
ファイル | emd_48724_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 : Complex of 2 Lecithin:Cholesterol Acyltransferase molecules bound...
全体 | 名称: Complex of 2 Lecithin:Cholesterol Acyltransferase molecules bound to Apolipoprotein dimer in HDL |
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要素 |
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-超分子 #1: Complex of 2 Lecithin:Cholesterol Acyltransferase molecules bound...
超分子 | 名称: Complex of 2 Lecithin:Cholesterol Acyltransferase molecules bound to Apolipoprotein dimer in HDL タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #2 |
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由来(天然) | 生物種: ![]() |
-分子 #1: Apolipoprotein A-I
分子 | 名称: Apolipoprotein A-I / タイプ: protein_or_peptide / ID: 1 詳細: molecular dynamics simulation containing 2 molecules of apolipoprotein A-I and 100 POPC コピー数: 2 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 28.120637 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: DEPPQSPWDR VKDLATVYVD VLKDSGRDYV SQFEGSALGK QLNLKLLDNW DSVTSTFSKL REQLGPVTQE FWDNLEKETE GLRQEMSKD LEEVKAKVQP YLDDFQKKWQ EEMELYRQKV EPLRAELQEG ARQKLHELQE KLSPLGEEMR DRARAHVDAL R THLAPYSD ...文字列: DEPPQSPWDR VKDLATVYVD VLKDSGRDYV SQFEGSALGK QLNLKLLDNW DSVTSTFSKL REQLGPVTQE FWDNLEKETE GLRQEMSKD LEEVKAKVQP YLDDFQKKWQ EEMELYRQKV EPLRAELQEG ARQKLHELQE KLSPLGEEMR DRARAHVDAL R THLAPYSD ELRQRLAARL EALKENGGAR LAEYHAKATE HLSTLSEKAK PALEDLRQGL LPVLESFKVS FLSALEEYTK KL NTQ UniProtKB: Apolipoprotein A-I |
-分子 #2: Phosphatidylcholine-sterol acyltransferase
分子 | 名称: Phosphatidylcholine-sterol acyltransferase / タイプ: protein_or_peptide / ID: 2 詳細: 4XWG Lecithin:Cholesterol Acyltransferase crystal structure of closed conformation コピー数: 2 / 光学異性体: LEVO / EC番号: phosphatidylcholine-sterol O-acyltransferase |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 44.879988 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: HTRPVILVPG YLGNQLEAKL DKPDVVNWMC YRKTEDFFTI WLDLNMFLPL GVDCWIDNTR VVYNRSSGLV SNAPGVQIRV PGFGKTYSV EYLDSSKLAG YLHTLVQNLV NNGYVRDETV RAAPYDWRLE PGQQEEYYRK LAGLVEEMHA AYGKPVFLIG H SLGCLHLL ...文字列: HTRPVILVPG YLGNQLEAKL DKPDVVNWMC YRKTEDFFTI WLDLNMFLPL GVDCWIDNTR VVYNRSSGLV SNAPGVQIRV PGFGKTYSV EYLDSSKLAG YLHTLVQNLV NNGYVRDETV RAAPYDWRLE PGQQEEYYRK LAGLVEEMHA AYGKPVFLIG H SLGCLHLL YFLLRQPQAW KDRFIDGFIS LGAPWGGSIK PMLVLASGDN QGIPIMSSIK LKEEQRITTT SPWMFPSRMA WP EDHVFIS TPSFNYTGRD FQRFFADLHF EEGWYMWLQS RDLLAGLPAP GVEVYCLYGV GLPTPRTYIY DHGFPYTDPV GVL YEDGDD TVATRSTELC GLWQGRQPQP VHLLPLHGIQ HLNMVFSNLT LEHINAILLG AYRQGPPASP TASPEPPPPE UniProtKB: Phosphatidylcholine-sterol acyltransferase |
-分子 #3: (4S,7R)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-...
分子 | 名称: (4S,7R)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSAN-1-AMINIUM 4-OXIDE タイプ: ligand / ID: 3 / コピー数: 158 / 式: 6PL |
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分子量 | 理論値: 763.1 Da |
Chemical component information | ![]() ChemComp-6PL: |
-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
緩衝液 | pH: 8 |
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グリッド | モデル: Quantifoil R2/2 / 材質: COPPER / メッシュ: 200 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: CONTINUOUS |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | TFS GLACIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 46.0 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: OTHER |
電子光学系 | 照射モード: OTHER / 撮影モード: OTHER / 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): 0.4 µm |
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画像解析
-原子モデル構築 1
精密化 | プロトコル: RIGID BODY FIT |
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得られたモデル | ![]() PDB-9mxz: |