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基本情報
登録情報 | データベース: PDB / ID: 9mxz | |||||||||||||||||||||
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タイトル | Lecithin:Cholesterol Acyltransferase Bound to Apolipoprotein A-I dimer in HDL | |||||||||||||||||||||
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![]() | LIPID TRANSPORT / Complex / Lecithin:Cholesterol Acyltransferase / Apolipoprotein A-I / HDL | |||||||||||||||||||||
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 / peptidyl-methionine modification / HDL clearance / sterol ester esterase activity / spherical high-density lipoprotein particle ...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 / peptidyl-methionine modification / HDL clearance / sterol ester esterase activity / spherical high-density lipoprotein particle / 1-alkyl-2-acetylglycerophosphocholine esterase / Scavenging by Class B Receptors / 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 / blood vessel endothelial cell migration / cholesterol import / 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 cell adhesion molecule production / negative regulation of cytokine production involved in immune response / phospholipase A2 activity / HDL assembly / negative regulation of very-low-density lipoprotein particle remodeling / phosphatidylcholine metabolic process / phosphatidylcholine biosynthetic process / aflatoxin metabolic process / glucocorticoid metabolic process / acylglycerol homeostasis / very-low-density lipoprotein particle remodeling / phosphatidylcholine-sterol O-acyltransferase activator activity / positive regulation of phospholipid efflux / Chylomicron remodeling / cellular response to lipoprotein particle stimulus / Chylomicron assembly / high-density lipoprotein particle clearance / phospholipid efflux / chylomicron / high-density lipoprotein particle remodeling / positive regulation of cholesterol metabolic process / lipid storage / reverse cholesterol transport / phospholipid homeostasis / high-density lipoprotein particle assembly / chemorepellent activity / low-density lipoprotein particle / lipoprotein biosynthetic process / cholesterol transfer activity / cholesterol transport / high-density lipoprotein particle / very-low-density lipoprotein particle / endothelial cell proliferation / regulation of Cdc42 protein signal transduction / HDL remodeling / cholesterol efflux / triglyceride homeostasis / Scavenging by Class A Receptors / negative regulation of interleukin-1 beta production / adrenal gland development / negative chemotaxis / cholesterol binding / response to copper ion / cholesterol biosynthetic process / positive regulation of Rho protein signal transduction / amyloid-beta formation / positive regulation of cholesterol efflux / endocytic vesicle / negative regulation of tumor necrosis factor-mediated signaling pathway / Scavenging of heme from plasma / Retinoid metabolism and transport / cholesterol metabolic process / positive regulation of stress fiber assembly / phospholipid metabolic process / heat shock protein binding / endocytic vesicle lumen / positive regulation of substrate adhesion-dependent cell spreading / response to glucocorticoid / positive regulation of phagocytosis / 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 / blood microparticle / secretory granule lumen 類似検索 - 分子機能 | |||||||||||||||||||||
生物種 | ![]() | |||||||||||||||||||||
手法 | 電子顕微鏡法 / 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, J.H. / Morris, J. / Manthei, K.A. / Hart, R.C. / He, Y. / Shah, A.S. / Jerome, W.G. / Vaisar, T. ...Coleman, B. / Bedi, S. / Hill, J.H. / Morris, J. / Manthei, K.A. / Hart, R.C. / He, Y. / Shah, A.S. / Jerome, W.G. / Vaisar, T. / Bornfeldt, K.E. / Song, H. / Segrest, J.P. / Heinecke, J.W. / Aller, S.G. / Tesmer, J.J.G. / 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
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 421.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 387.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 2.8 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 3.2 MB | 表示 | |
XML形式データ | ![]() | 126 KB | 表示 | |
CIF形式データ | ![]() | 155.3 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 | ![]() 48724MC M: このデータのモデリングに利用したマップデータ 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
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 28120.637 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: molecular dynamics simulation containing 2 molecules of apolipoprotein A-I and 100 POPC 由来: (組換発現) ![]() ![]() ![]() #2: タンパク質 | 分子量: 44879.988 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: 4XWG Lecithin:Cholesterol Acyltransferase crystal structure of closed conformation 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P04180, phosphatidylcholine-sterol O-acyltransferase, 1-alkyl-2-acetylglycerophosphocholine esterase #3: 化合物 | ChemComp-6PL / ( 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Complex of 2 Lecithin:Cholesterol Acyltransferase molecules bound to Apolipoprotein dimer in HDL タイプ: COMPLEX / Entity ID: #2 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/2 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS |
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電子銃 | 電子線源: OTHER / 加速電圧: 200 kV / 照射モード: OTHER |
電子レンズ | モード: OTHER / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 400 nm |
撮影 | 電子線照射量: 46 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
EMソフトウェア | 名称: HADDOCK / カテゴリ: モデルフィッティング |
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CTF補正 | タイプ: PHASE FLIPPING ONLY |
3次元再構成 | 解像度: 9.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 44391 / 対称性のタイプ: POINT |
原子モデル構築 | プロトコル: RIGID BODY FIT |