+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8szf | ||||||
---|---|---|---|---|---|---|---|
タイトル | Cryo-EM structure of cinacalcet-bound active-state human calcium-sensing receptor CaSR in lipid nanodiscs | ||||||
要素 | (Extracellular calcium-sensing ...) x 2 | ||||||
キーワード | SIGNALING PROTEIN / Family C GPCR / Calcium-sensing Receptor (CaSR) / Lipid Nanodiscs / Positive Allosteric Modulator / Membrane Protein | ||||||
機能・相同性 | 機能・相同性情報 bile acid secretion / chemosensory behavior / response to fibroblast growth factor / cellular response to peptide / cellular response to vitamin D / phosphatidylinositol phospholipase C activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / calcium ion import / positive regulation of positive chemotaxis / fat pad development ...bile acid secretion / chemosensory behavior / response to fibroblast growth factor / cellular response to peptide / cellular response to vitamin D / phosphatidylinositol phospholipase C activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / calcium ion import / positive regulation of positive chemotaxis / fat pad development / cellular response to hepatocyte growth factor stimulus / amino acid binding / branching morphogenesis of an epithelial tube / positive regulation of calcium ion import / regulation of calcium ion transport / cellular response to low-density lipoprotein particle stimulus / detection of calcium ion / anatomical structure morphogenesis / axon terminus / positive regulation of vasoconstriction / JNK cascade / chloride transmembrane transport / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / ossification / response to ischemia / G protein-coupled receptor activity / cellular response to glucose stimulus / positive regulation of insulin secretion / intracellular calcium ion homeostasis / vasodilation / integrin binding / phospholipase C-activating G protein-coupled receptor signaling pathway / cellular response to hypoxia / G alpha (i) signalling events / basolateral plasma membrane / G alpha (q) signalling events / transmembrane transporter binding / positive regulation of ERK1 and ERK2 cascade / G protein-coupled receptor signaling pathway / apical plasma membrane / neuronal cell body / positive regulation of cell population proliferation / calcium ion binding / positive regulation of gene expression / protein kinase binding / cell surface / protein homodimerization activity / identical protein binding / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
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: 2.8 Å | ||||||
データ登録者 | He, F. / Wu, C. / Gao, Y. / Skiniotis, G. | ||||||
資金援助 | 米国, 1件
| ||||||
引用 | ジャーナル: Nature / 年: 2024 タイトル: Allosteric modulation and G-protein selectivity of the Ca-sensing receptor. 著者: Feng He / Cheng-Guo Wu / Yang Gao / Sabrina N Rahman / Magda Zaoralová / Makaía M Papasergi-Scott / Ting-Jia Gu / Michael J Robertson / Alpay B Seven / Lingjun Li / Jesper M Mathiesen / Georgios Skiniotis / 要旨: The calcium-sensing receptor (CaSR) is a family C G-protein-coupled receptor (GPCR) that has a central role in regulating systemic calcium homeostasis. Here we use cryo-electron microscopy and ...The calcium-sensing receptor (CaSR) is a family C G-protein-coupled receptor (GPCR) that has a central role in regulating systemic calcium homeostasis. Here we use cryo-electron microscopy and functional assays to investigate the activation of human CaSR embedded in lipid nanodiscs and its coupling to functional G versus G proteins in the presence and absence of the calcimimetic drug cinacalcet. High-resolution structures show that both G and G drive additional conformational changes in the activated CaSR dimer to stabilize a more extensive asymmetric interface of the seven-transmembrane domain (7TM) that involves key protein-lipid interactions. Selective G and G coupling by the receptor is achieved through substantial rearrangements of intracellular loop 2 and the C terminus, which contribute differentially towards the binding of the two G-protein subtypes, resulting in distinct CaSR-G-protein interfaces. The structures also reveal that natural polyamines target multiple sites on CaSR to enhance receptor activation by zipping negatively charged regions between two protomers. Furthermore, we find that the amino acid L-tryptophan, a well-known ligand of CaSR extracellular domains, occupies the 7TM bundle of the G-protein-coupled protomer at the same location as cinacalcet and other allosteric modulators. Together, these results provide a framework for G-protein activation and selectivity by CaSR, as well as its allosteric modulation by endogenous and exogenous ligands. | ||||||
履歴 |
|
-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
---|
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8szf.cif.gz | 345.9 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb8szf.ent.gz | 265.2 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8szf.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8szf_validation.pdf.gz | 1.3 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 8szf_full_validation.pdf.gz | 1.3 MB | 表示 | |
XML形式データ | 8szf_validation.xml.gz | 47.1 KB | 表示 | |
CIF形式データ | 8szf_validation.cif.gz | 71.4 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/sz/8szf ftp://data.pdbj.org/pub/pdb/validation_reports/sz/8szf | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
-Extracellular calcium-sensing ... , 2種, 2分子 AB
#1: タンパク質 | 分子量: 123820.969 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CASR, GPRC2A, PCAR1 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P41180 |
---|---|
#2: タンパク質 | 分子量: 108023.055 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CASR, GPRC2A, PCAR1 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P41180 |
-糖 , 2種, 8分子
#3: 多糖 | #4: 糖 | ChemComp-NAG / |
---|
-非ポリマー , 5種, 11分子
#5: 化合物 | #6: 化合物 | ChemComp-CA / #7: 化合物 | #8: 化合物 | #9: 化合物 | ChemComp-SPM / | |
---|
-詳細
研究の焦点であるリガンドがあるか | Y |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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 |
-試料調製
構成要素 | 名称: Cinacalcet-bound active-state human calcium-sensing receptor CaSR dimer in lipid nanodiscs タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
---|---|
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) |
緩衝液 | pH: 7.5 |
試料 | 濃度: 7 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 500 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3次元再構成 | 解像度: 2.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 234170 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 最高解像度: 2.8 Å | ||||||||||||||||||||||||
拘束条件 |
|