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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 8b7q | ||||||
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タイトル | Cryo-EM structure for the mouse LEPR-CRH2:Leptin:LEPR-Ig complex following symmetry expansion in combination with local refinement | ||||||
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![]() | CYTOKINE / leptin / LEP-R / obesity / metabolism / energy balance | ||||||
機能・相同性 | ![]() Synthesis, secretion, and deacylation of Ghrelin / regulation of lipoprotein lipid oxidation / cellular response to L-ascorbic acid / positive regulation of fat cell apoptotic process / negative regulation of glutamine transport / leptin receptor activity / regulation of transport / negative regulation of appetite by leptin-mediated signaling pathway / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / negative regulation of glucagon secretion ...Synthesis, secretion, and deacylation of Ghrelin / regulation of lipoprotein lipid oxidation / cellular response to L-ascorbic acid / positive regulation of fat cell apoptotic process / negative regulation of glutamine transport / leptin receptor activity / regulation of transport / negative regulation of appetite by leptin-mediated signaling pathway / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / negative regulation of glucagon secretion / regulation of endothelial cell proliferation / regulation of natural killer cell mediated cytotoxicity / regulation of natural killer cell proliferation / leptin receptor binding / positive regulation of luteinizing hormone secretion / bone growth / regulation of natural killer cell activation / glycerol biosynthetic process / elastin metabolic process / leptin-mediated signaling pathway / positive regulation of hepatic stellate cell activation / positive regulation of follicle-stimulating hormone secretion / regulation of steroid biosynthetic process / positive regulation of monoatomic ion transport / regulation of intestinal cholesterol absorption / regulation of bone remodeling / regulation of brown fat cell differentiation / positive regulation of peroxisome proliferator activated receptor signaling pathway / regulation of nitric-oxide synthase activity / adult feeding behavior / response to leptin / activation of protein kinase C activity / bone mineralization involved in bone maturation / regulation of lipid biosynthetic process / negative regulation of cartilage development / sexual reproduction / regulation of feeding behavior / ovulation from ovarian follicle / negative regulation of appetite / positive regulation of developmental growth / leukocyte tethering or rolling / energy reserve metabolic process / bile acid metabolic process / cellular response to leptin stimulus / negative regulation of D-glucose import / prostaglandin secretion / regulation of protein localization to nucleus / cardiac muscle hypertrophy / hormone metabolic process / positive regulation of p38MAPK cascade / intestinal absorption / regulation of fat cell differentiation / insulin secretion / regulation of metabolic process / aorta development / negative regulation of vasoconstriction / peptide hormone receptor binding / regulation of gluconeogenesis / glycogen metabolic process / eating behavior / fatty acid beta-oxidation / regulation of cytokine production involved in inflammatory response / central nervous system neuron development / response to dietary excess / negative regulation of lipid storage / T cell differentiation / response to vitamin E / cell surface receptor signaling pathway via JAK-STAT / positive regulation of TOR signaling / regulation of angiogenesis / adipose tissue development / negative regulation of gluconeogenesis / phagocytosis / positive regulation of insulin receptor signaling pathway / glial cell proliferation / positive regulation of T cell proliferation / energy homeostasis / cellular response to retinoic acid / positive regulation of interleukin-12 production / regulation of insulin secretion / negative regulation of autophagy / cholesterol metabolic process / response to activity / gluconeogenesis / positive regulation of interleukin-8 production / female pregnancy / positive regulation of receptor signaling pathway via JAK-STAT / determination of adult lifespan / response to insulin / placenta development / hormone activity / regulation of blood pressure / positive regulation of interleukin-6 production / lipid metabolic process / positive regulation of protein import into nucleus / cellular response to insulin stimulus / circadian rhythm / glucose metabolic process / positive regulation of reactive oxygen species metabolic process / positive regulation of tumor necrosis factor production 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: 4.02 Å | ||||||
![]() | Verstraete, K. / Savvides, S.N. / Verschueren, K.G. / Tsirigotaki, A. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Mechanism of receptor assembly via the pleiotropic adipokine Leptin. 著者: Alexandra Tsirigotaki / Ann Dansercoer / Koen H G Verschueren / Iva Marković / Christoph Pollmann / Maximillian Hafer / Jan Felix / Catherine Birck / Wouter Van Putte / Dominiek Catteeuw / ...著者: Alexandra Tsirigotaki / Ann Dansercoer / Koen H G Verschueren / Iva Marković / Christoph Pollmann / Maximillian Hafer / Jan Felix / Catherine Birck / Wouter Van Putte / Dominiek Catteeuw / Jan Tavernier / J Fernando Bazan / Jacob Piehler / Savvas N Savvides / Kenneth Verstraete / ![]() ![]() ![]() ![]() 要旨: The adipokine Leptin activates its receptor LEP-R in the hypothalamus to regulate body weight and exerts additional pleiotropic functions in immunity, fertility and cancer. However, the structure and ...The adipokine Leptin activates its receptor LEP-R in the hypothalamus to regulate body weight and exerts additional pleiotropic functions in immunity, fertility and cancer. However, the structure and mechanism of Leptin-mediated LEP-R assemblies has remained unclear. Intriguingly, the signaling-competent isoform of LEP-R is only lowly abundant amid several inactive short LEP-R isoforms contributing to a mechanistic conundrum. Here we show by X-ray crystallography and cryo-EM that, in contrast to long-standing paradigms, Leptin induces type I cytokine receptor assemblies featuring 3:3 stoichiometry and demonstrate such Leptin-induced trimerization of LEP-R on living cells via single-molecule microscopy. In mediating these assemblies, Leptin undergoes drastic restructuring that activates its site III for binding to the Ig domain of an adjacent LEP-R. These interactions are abolished by mutations linked to obesity. Collectively, our study provides the structural and mechanistic framework for how evolutionarily conserved Leptin:LEP-R assemblies with 3:3 stoichiometry can engage distinct LEP-R isoforms to achieve signaling. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 153.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 93.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 15899MC ![]() 7z3pC ![]() 7z3qC ![]() 7z3rC ![]() 8av2C ![]() 8avbC ![]() 8avcC ![]() 8avdC ![]() 8aveC ![]() 8avfC ![]() 8avoC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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: 18873.283 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Mouse leptin was produced with an N-terminal His-tag and refolded from inclusion bodies produced in E. coli 由来: (組換発現) ![]() ![]() ![]() ![]() | ||||||
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#2: タンパク質 | 分子量: 97479.391 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: The mLEP-R ectodomain was C-terminally fused to a trimeric GCN4 isoleucine zipper tag and secreted from HEK93 FreeStyle cells and complexed with refolded mouse leptin produced in E.coli. 由来: (組換発現) ![]() ![]() ![]() #3: 糖 | ChemComp-NAG / | 研究の焦点であるリガンドがあるか | Y | Has protein modification | Y | |
-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: Mouse leptin in complex with a trimerized form of the mouse Lep-R extracellular region タイプ: COMPLEX 詳細: The mLEP-R ectodomain was C-terminally fused to a trimeric GCN4 isoleucine zipper tag and secreted from HEK93 FreeStyle cells and complexed with refolded mouse leptin produced in E.coli. Entity ID: #1-#2 / 由来: RECOMBINANT | |||||||||||||||
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分子量 | 値: 0.444 MDa / 実験値: YES | |||||||||||||||
由来(天然) | 生物種: ![]() ![]() | |||||||||||||||
由来(組換発現) | 生物種: ![]() | |||||||||||||||
緩衝液 | pH: 7.4 / 詳細: 20 mM HEPES, 150 mM NaCl, pH 7.4 | |||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: This sample was monodisperse. | |||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: C-flat-1.2/1.3 | |||||||||||||||
急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE / 湿度: 99 % / 凍結前の試料温度: 295 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: OTHER / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1200 nm / Cs: 2.7 mm |
撮影 | 電子線照射量: 45 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 / 実像数: 13230 |
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解析
ソフトウェア |
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 141157 | |||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | |||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.02 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 163914 詳細: To address the breakage of symmetry in the ring-like core region of the complex and possibly revolve the mLEP-RCRH2:mLeptin:mLEP-RCRH1-IgCRH2 subcomplex at higher resolution, the pseudo-C3 ...詳細: To address the breakage of symmetry in the ring-like core region of the complex and possibly revolve the mLEP-RCRH2:mLeptin:mLEP-RCRH1-IgCRH2 subcomplex at higher resolution, the pseudo-C3 symmetric volume following consenus refinement was aligned to the pseudo-C3 symmetry axis via the Volume Alignment Tool job in cryoSPARC. The associated particle set was re-extracted without binning and symmetry expanded around the C3 axis resulting in 163,914 particles. Using the molmap function in Chimera, a volume blurred to 25 Angstrom around one mLEP-RCRH2:mLeptin:mLEP-RCRH1-IgCRH2 subcomplex was generated, and transformed into a mask with the Volume Tools job in cryoSPARC. Local refinement was performed by limiting the rotation and shift search extent around the original consensus refinement. The center of mass of the mask was used as a fulcrum point. This approach resulted in a cryo-EM map with an FSC0.143 resolution of 4.02 Angstrom in which the crystallographic model for the mLEP-RCRH2:mLeptin:mLEP-R_IgCRH2' complex was fitted using Chimera and real-space refined in Phenix using reference restraints to the starting model. 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL 詳細: The crystallographic model for the mLEP-RCRH2:mLeptin:mLEP-R_IgCRH2' complex (pdb 7z3r) was fitted in the cryo-EM map using Chimera and real-space refined in Phenix using reference restraints ...詳細: The crystallographic model for the mLEP-RCRH2:mLeptin:mLEP-R_IgCRH2' complex (pdb 7z3r) was fitted in the cryo-EM map using Chimera and real-space refined in Phenix using reference restraints to the starting model. | |||||||||||||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | |||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 101.59 Å2 | |||||||||||||||||||||||||||||||||||
拘束条件 |
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