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- EMDB-33889: Cryo-EM structure of the DC591053-bound human relaxin family pept... -
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Basic information
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Title | Cryo-EM structure of the DC591053-bound human relaxin family peptide receptor 4 (RXFP4)-Gi complex | ||||||||||||||||||||||||||||||||||||
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![]() | human relaxin family peptide receptor 4 / G protein-coupled receptor / ligand recognition / STRUCTURAL PROTEIN | ||||||||||||||||||||||||||||||||||||
Function / homology | ![]() Relaxin receptors / positive regulation of feeding behavior / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis / G protein-coupled adenosine receptor signaling pathway / positive regulation of urine volume / negative regulation of adenylate cyclase activity / positive regulation of neural precursor cell proliferation / negative regulation of synaptic transmission / G protein-coupled peptide receptor activity ...Relaxin receptors / positive regulation of feeding behavior / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis / G protein-coupled adenosine receptor signaling pathway / positive regulation of urine volume / negative regulation of adenylate cyclase activity / positive regulation of neural precursor cell proliferation / negative regulation of synaptic transmission / G protein-coupled peptide receptor activity / gamma-aminobutyric acid signaling pathway / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / G alpha (q) signalling events / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / neuronal dense core vesicle / regulation of calcium ion transport / negative regulation of apoptotic signaling pathway / neuropeptide signaling pathway / positive regulation of insulin receptor signaling pathway / Adenylate cyclase inhibitory pathway / positive regulation of vascular associated smooth muscle cell proliferation / response to nutrient / hippocampal mossy fiber to CA3 synapse / positive regulation of superoxide anion generation / Regulation of insulin secretion / G protein-coupled receptor binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / 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 / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / cell body / GTPase binding / Ca2+ pathway / retina development in camera-type eye / midbody / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / G alpha (s) signalling events / G alpha (q) signalling events Similarity search - Function | ||||||||||||||||||||||||||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.75 Å | ||||||||||||||||||||||||||||||||||||
![]() | Chen Y / Zhou QT / Wang J / Xu YW / Wang Y / Yan JH / Wang YB / Zhu Q / Zhao FH / Li CH ...Chen Y / Zhou QT / Wang J / Xu YW / Wang Y / Yan JH / Wang YB / Zhu Q / Zhao FH / Li CH / Chen CW / Cai XQ / Bathgate RAD / Shen C / Xu HE / Yang DH / Liu H / Wang MW | ||||||||||||||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Ligand recognition mechanism of the human relaxin family peptide receptor 4 (RXFP4). Authors: Yan Chen / Qingtong Zhou / Jiang Wang / Youwei Xu / Yun Wang / Jiahui Yan / Yibing Wang / Qi Zhu / Fenghui Zhao / Chenghao Li / Chuan-Wei Chen / Xiaoqing Cai / Ross A D Bathgate / Chun Shen ...Authors: Yan Chen / Qingtong Zhou / Jiang Wang / Youwei Xu / Yun Wang / Jiahui Yan / Yibing Wang / Qi Zhu / Fenghui Zhao / Chenghao Li / Chuan-Wei Chen / Xiaoqing Cai / Ross A D Bathgate / Chun Shen / H Eric Xu / Dehua Yang / Hong Liu / Ming-Wei Wang / ![]() ![]() ![]() Abstract: Members of the insulin superfamily regulate pleiotropic biological processes through two types of target-specific but structurally conserved peptides, insulin/insulin-like growth factors and ...Members of the insulin superfamily regulate pleiotropic biological processes through two types of target-specific but structurally conserved peptides, insulin/insulin-like growth factors and relaxin/insulin-like peptides. The latter bind to the human relaxin family peptide receptors (RXFPs). Here, we report three cryo-electron microscopy structures of RXFP4-G protein complexes in the presence of the endogenous ligand insulin-like peptide 5 (INSL5) or one of the two small molecule agonists, compound 4 and DC591053. The B chain of INSL5 adopts a single α-helix that penetrates into the orthosteric pocket, while the A chain sits above the orthosteric pocket, revealing a peptide-binding mode previously unknown. Together with mutagenesis and functional analyses, the key determinants responsible for the peptidomimetic agonism and subtype selectivity were identified. Our findings not only provide insights into ligand recognition and subtype selectivity among class A G protein-coupled receptors, but also expand the knowledge of signaling mechanisms in the insulin superfamily. | ||||||||||||||||||||||||||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 56.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 23.9 KB 23.9 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.4 KB | Display | ![]() |
Images | ![]() | 104.5 KB | ||
Filedesc metadata | ![]() | 6.9 KB | ||
Others | ![]() ![]() | 59.5 MB 59.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 711.7 KB | Display | ![]() |
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Full document | ![]() | 711.3 KB | Display | |
Data in XML | ![]() | 16.2 KB | Display | |
Data in CIF | ![]() | 21.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7yk7MC ![]() 7yj4C ![]() 7yk6C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.071 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
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Projections & Slices |
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Density Histograms |
-Half map: #1
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Density Histograms |
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Sample components
+Entire : Cryo-EM structure of the human relaxin family peptide receptor 4 ...
+Supramolecule #1: Cryo-EM structure of the human relaxin family peptide receptor 4 ...
+Supramolecule #2: relaxin family peptide receptor 4
+Supramolecule #3: G protein
+Supramolecule #4: scFv16
+Macromolecule #1: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-2
+Macromolecule #3: Relaxin-3 receptor 2
+Macromolecule #4: scFv16
+Macromolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+Macromolecule #6: [(1S)-7-ethoxy-6-methoxy-1-[2-(5-methoxy-1H-indol-3-yl)ethyl]-3,4...
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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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 (6k x 4k) / Average electron dose: 80.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: OTHER |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |