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Yorodumi- EMDB-40915: 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-Gq 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 / chemosensory behavior / Fatty Acids bound to GPR40 (FFAR1) regulate insulin secretion / Acetylcholine regulates insulin secretion / sensory perception of itch / response to fibroblast growth factor / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / cellular response to peptide / PLC beta mediated events ...regulation of presynaptic membrane potential / bile acid secretion / chemosensory behavior / Fatty Acids bound to GPR40 (FFAR1) regulate insulin secretion / Acetylcholine regulates insulin secretion / sensory perception of itch / response to fibroblast growth factor / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / cellular response to peptide / PLC beta mediated events / phospholipase C-activating serotonin receptor signaling pathway / regulation of platelet activation / entrainment of circadian clock / cellular response to vitamin D / positive regulation of positive chemotaxis / Class C/3 (Metabotropic glutamate/pheromone receptors) / regulation of canonical Wnt signaling pathway / fat pad development / cellular response to hepatocyte growth factor stimulus / glutamate receptor signaling pathway / amino acid binding / branching morphogenesis of an epithelial tube / mast cell degranulation / positive regulation of calcium ion import / regulation of calcium ion transport / positive regulation of NLRP3 inflammasome complex assembly / phototransduction, visible light / positive regulation of vasoconstriction / anatomical structure morphogenesis / photoreceptor outer segment / cellular response to low-density lipoprotein particle stimulus / detection of calcium ion / postsynaptic cytosol / cellular response to acidic pH / JNK cascade / hormone-mediated signaling pathway / ossification / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / axon terminus / response to ischemia / chloride transmembrane transport / GTPase activator activity / neuropeptide signaling pathway / cellular response to glucose stimulus / response to prostaglandin E / G protein-coupled receptor binding / integrin binding / vasodilation / G protein-coupled receptor activity / G-protein beta/gamma-subunit complex binding / intracellular calcium ion homeostasis / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / blood coagulation / positive regulation of insulin secretion / 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 / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / 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 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / adenylate cyclase-activating G protein-coupled receptor signaling pathway / retina development in camera-type eye / GTPase binding / fibroblast proliferation / G protein activity / presynaptic membrane / Ca2+ pathway / nuclear membrane Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.6 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
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Downloads & links
-EMDB archive
| Map data | emd_40915.map.gz | 391.7 MB | EMDB map data format | |
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| Header (meta data) | emd-40915-v30.xml emd-40915.xml | 27.5 KB 27.5 KB | Display Display | EMDB header |
| Images | emd_40915.png | 100.9 KB | ||
| Filedesc metadata | emd-40915.cif.gz | 7.9 KB | ||
| Others | emd_40915_additional_1.map.gz emd_40915_additional_2.map.gz emd_40915_additional_3.map.gz | 211.2 MB 210.4 MB 210.3 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-40915 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-40915 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8szgMC ![]() 8szfC ![]() 8szhC ![]() 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_40915.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_40915_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_40915_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 Gq
| File | emd_40915_additional_3.map | ||||||||||||
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| Annotation | Local unsharpened refinement map of Gq | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Cinacalcet-bound human calcium-sensing receptor CaSR-Gq complex i...
+Supramolecule #1: Cinacalcet-bound human calcium-sensing receptor CaSR-Gq complex i...
+Macromolecule #1: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+Macromolecule #3: Extracellular calcium-sensing receptor
+Macromolecule #4: Extracellular calcium-sensing receptor
+Macromolecule #5: Guanine nucleotide-binding protein G(q) subunit alpha
+Macromolecule #7: N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]pr...
+Macromolecule #8: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #9: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
+Macromolecule #10: SPERMINE
+Macromolecule #11: CALCIUM ION
+Macromolecule #12: TRYPTOPHAN
+Macromolecule #13: PHOSPHATE ION
+Macromolecule #14: CHOLESTEROL
+Macromolecule #15: 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: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 89192 |
| 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
