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Yorodumi- EMDB-40916: Cryo-EM structure of cinacalcet-bound human calcium-sensing recep... -
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Basic information
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| Title | Cryo-EM structure of cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs | |||||||||
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Keywords | Family C GPCR / Calcium-sensing Receptor (CaSR) / Heterotrimeric G protein / Cryo-EM / Lipid Nanodiscs / Positive Allosteric Modulator / Membrane Protein / SIGNALING PROTEIN | |||||||||
| Function / homology | Function and homology informationregulation of presynaptic membrane potential / bile acid secretion / response to fibroblast growth factor / chemosensory behavior / cellular response to peptide / cellular response to vitamin D / negative regulation of adenylate cyclase activity / cellular response to hepatocyte growth factor stimulus / Class C/3 (Metabotropic glutamate/pheromone receptors) / positive regulation of positive chemotaxis ...regulation of presynaptic membrane potential / bile acid secretion / response to fibroblast growth factor / chemosensory behavior / cellular response to peptide / cellular response to vitamin D / negative regulation of adenylate cyclase activity / cellular response to hepatocyte growth factor stimulus / Class C/3 (Metabotropic glutamate/pheromone receptors) / positive regulation of positive chemotaxis / GTP metabolic process / branching morphogenesis of an epithelial tube / fat pad development / amino acid binding / positive regulation of calcium ion import / regulation of calcium ion transport / positive regulation of NLRP3 inflammasome complex assembly / positive regulation of macroautophagy / cellular response to low-density lipoprotein particle stimulus / positive regulation of vasoconstriction / JNK cascade / anatomical structure morphogenesis / detection of calcium ion / ossification / Adenylate cyclase inhibitory pathway / response to ischemia / axon terminus / chloride transmembrane transport / cellular response to glucose stimulus / vasodilation / intracellular calcium ion homeostasis / integrin binding / G protein-coupled receptor binding / G protein-coupled receptor activity / positive regulation of insulin secretion / G-protein beta/gamma-subunit complex binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / GDP binding / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Glucagon-type ligand receptors / Sensory perception of sweet, bitter, and umami (glutamate) taste / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / G alpha (12/13) signalling events / G-protein beta-subunit binding / extracellular vesicle / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / GTPase binding / presynaptic membrane / midbody / cellular response to hypoxia / Ca2+ pathway / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / ciliary basal body / G alpha (s) signalling events / basolateral plasma membrane / G alpha (q) signalling events / transmembrane transporter binding / Ras protein signal transduction / positive regulation of ERK1 and ERK2 cascade / Extra-nuclear estrogen signaling / apical plasma membrane / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / neuronal cell body / GTPase activity / centrosome / positive regulation of gene expression Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
Authors | He F / Wu C / Gao Y / Skiniotis G | |||||||||
| Funding support | United States, 1 items
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Citation | Journal: Nature / Year: 2024Title: Allosteric modulation and G-protein selectivity of the Ca-sensing receptor. Authors: 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 / ![]() Abstract: 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. | |||||||||
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Structure visualization
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_40916.map.gz | 391.2 MB | EMDB map data format | |
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| Header (meta data) | emd-40916-v30.xml emd-40916.xml | 25.3 KB 25.3 KB | Display Display | EMDB header |
| Images | emd_40916.png | 100.3 KB | ||
| Filedesc metadata | emd-40916.cif.gz | 7.6 KB | ||
| Others | emd_40916_additional_1.map.gz emd_40916_additional_2.map.gz emd_40916_additional_3.map.gz | 209.6 MB 205.9 MB 206 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-40916 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-40916 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8szhMC ![]() 8szfC ![]() 8szgC ![]() 8sziC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_40916.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.8677 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: Local unsharpened refinement map of CaSR VFT and CRD domains
| File | emd_40916_additional_1.map | ||||||||||||
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| Annotation | Local unsharpened refinement map of CaSR VFT and CRD domains | ||||||||||||
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-Additional map: Local unsharpened refinement map of CaSR CRD and 7TM domains
| File | emd_40916_additional_2.map | ||||||||||||
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| Annotation | Local unsharpened refinement map of CaSR CRD and 7TM domains | ||||||||||||
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-Additional map: Local unsharpened refinement map of Gi3
| File | emd_40916_additional_3.map | ||||||||||||
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| Annotation | Local unsharpened refinement map of Gi3 | ||||||||||||
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Sample components
+Entire : Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex i...
+Supramolecule #1: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex i...
+Macromolecule #1: Extracellular calcium-sensing receptor
+Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-3
+Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+Macromolecule #6: N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]pr...
+Macromolecule #7: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
+Macromolecule #8: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #9: CALCIUM ION
+Macromolecule #10: TRYPTOPHAN
+Macromolecule #11: PHOSPHATE ION
+Macromolecule #12: SPERMINE
+Macromolecule #13: CHOLESTEROL
+Macromolecule #14: water
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
| Startup model | Type of model: OTHER |
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| Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 262847 |
| Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
| Final angle assignment | Type: MAXIMUM LIKELIHOOD |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United States, 1 items
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FIELD EMISSION GUN
