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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-9912 | |||||||||
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Title | cryo-EM structure of alpha2BAR-Gi1 complex | |||||||||
![]() | alpha2BAR-Gi1 complex | |||||||||
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![]() | GPCR / Complex / cryo-EM / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() Activation of the phototransduction cascade / Olfactory Signaling Pathway / Sensory perception of sweet, bitter, and umami (glutamate) taste / negative regulation of uterine smooth muscle contraction / adenylate cyclase-inhibiting adrenergic receptor signaling pathway / alpha2-adrenergic receptor activity / Adrenaline signalling through Alpha-2 adrenergic receptor / alpha-2C adrenergic receptor binding / phospholipase C-activating adrenergic receptor signaling pathway / : ...Activation of the phototransduction cascade / Olfactory Signaling Pathway / Sensory perception of sweet, bitter, and umami (glutamate) taste / negative regulation of uterine smooth muscle contraction / adenylate cyclase-inhibiting adrenergic receptor signaling pathway / alpha2-adrenergic receptor activity / Adrenaline signalling through Alpha-2 adrenergic receptor / alpha-2C adrenergic receptor binding / phospholipase C-activating adrenergic receptor signaling pathway / : / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / regulation of vascular associated smooth muscle contraction / Prostacyclin signalling through prostacyclin receptor / negative regulation of epinephrine secretion / epinephrine binding / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G alpha (z) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / G beta:gamma signalling through BTK / positive regulation of uterine smooth muscle contraction / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Adenylate cyclase inhibitory pathway / Thromboxane signalling through TP receptor / negative regulation of norepinephrine secretion / alpha-1B adrenergic receptor binding / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / negative regulation of calcium ion transmembrane transporter activity / G-protein activation / G alpha (s) signalling events / G alpha (12/13) signalling events / Ca2+ pathway / G alpha (q) signalling events / Extra-nuclear estrogen signaling / heterotrimeric G-protein binding / Vasopressin regulates renal water homeostasis via Aquaporins / GPER1 signaling / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / negative regulation of calcium ion-dependent exocytosis / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / ADP signalling through P2Y purinoceptor 1 / activation of protein kinase activity / dopaminergic synapse / Surfactant metabolism / positive regulation of blood pressure / thermoception / positive regulation of potassium ion transport / fear response / thioesterase binding / negative regulation of insulin secretion involved in cellular response to glucose stimulus / response to alcohol / positive regulation of membrane protein ectodomain proteolysis / norepinephrine binding / intestinal absorption / Adrenoceptors / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / response to morphine / positive regulation of epidermal growth factor receptor signaling pathway / Extra-nuclear estrogen signaling / positive regulation of wound healing / G alpha (i) signalling events / spectrin binding / adrenergic receptor signaling pathway / alkylglycerophosphoethanolamine phosphodiesterase activity / negative regulation of calcium ion transport / phototransduction, visible light / photoreceptor outer segment / Rho protein signal transduction / regulation of vasoconstriction / negative regulation of lipid catabolic process / negative regulation of insulin secretion / cellular response to hormone stimulus / viral release from host cell by cytolysis / positive regulation of protein localization to cell cortex / activation of protein kinase B activity / adenylate cyclase-activating adrenergic receptor signaling pathway / presynaptic active zone membrane / G protein-coupled serotonin receptor binding / axon terminus / cardiac muscle cell apoptotic process / presynaptic modulation of chemical synaptic transmission / peptidoglycan catabolic process / cellular response to forskolin / positive regulation of MAP kinase activity / positive regulation of neuron differentiation / regulation of mitotic spindle organization / guanyl-nucleotide exchange factor activity / positive regulation of cytokine production / GABA-ergic synapse / female pregnancy / G protein-coupled receptor binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.1 Å | |||||||||
![]() | Yuan D / Liu Z | |||||||||
![]() | ![]() Title: Activation of the α adrenoceptor by the sedative sympatholytic dexmedetomidine. Authors: Daopeng Yuan / Zhongmin Liu / Jonas Kaindl / Shoji Maeda / Jiawei Zhao / Xiaoou Sun / Jun Xu / Peter Gmeiner / Hong-Wei Wang / Brian K Kobilka / ![]() ![]() ![]() Abstract: The α adrenergic receptors (αARs) are G protein-coupled receptors (GPCRs) that respond to adrenaline and noradrenaline and couple to the Gi/o family of G proteins. αARs play important roles in ...The α adrenergic receptors (αARs) are G protein-coupled receptors (GPCRs) that respond to adrenaline and noradrenaline and couple to the Gi/o family of G proteins. αARs play important roles in regulating the sympathetic nervous system. Dexmedetomidine is a highly selective αAR agonist used in post-operative patients as an anxiety-reducing, sedative medicine that decreases the requirement for opioids. As is typical for selective αAR agonists, dexmedetomidine consists of an imidazole ring and a substituted benzene moiety lacking polar groups, which is in contrast to βAR-selective agonists, which share an ethanolamine group and an aromatic system with polar, hydrogen-bonding substituents. To better understand the structural basis for the selectivity and efficacy of adrenergic agonists, we determined the structure of the αAR in complex with dexmedetomidine and Go at a resolution of 2.9 Å by single-particle cryo-EM. The structure reveals the mechanism of αAR-selective activation and provides insights into Gi/o coupling specificity. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 3.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.7 KB 15.7 KB | Display Display | ![]() |
Images | ![]() | 48.3 KB | ||
Filedesc metadata | ![]() | 6.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 336.6 KB | Display | ![]() |
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Full document | ![]() | 336.2 KB | Display | |
Data in XML | ![]() | 5.9 KB | Display | |
Data in CIF | ![]() | 6.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6k42MC ![]() 9911C ![]() 6k41C C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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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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Annotation | alpha2BAR-Gi1 complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.401 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : alpha2BAR-Gi1 complex
Entire | Name: alpha2BAR-Gi1 complex |
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Components |
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-Supramolecule #1: alpha2BAR-Gi1 complex
Supramolecule | Name: alpha2BAR-Gi1 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 150 KDa |
-Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1
Macromolecule | Name: Guanine nucleotide-binding protein G(i) subunit alpha-1 type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 40.415031 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKDCGLF UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1 |
-Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 38.530992 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: HHHHHHGSSG QSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKL IIWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC R FLDDNQIV ...String: HHHHHHGSSG QSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKL IIWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC R FLDDNQIV TSSGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD IN AICFFPN GNAFATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAG HDNRVS CLGVTDDGMA VATGSWDSFL KIWN UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 7.861143 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #4: Alpha-2A adrenergic receptor,Endolysin,Alpha-2B adrenergic recept...
Macromolecule | Name: Alpha-2A adrenergic receptor,Endolysin,Alpha-2B adrenergic receptor,Alpha-2B adrenergic receptor type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: lysozyme |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 58.156211 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: DDDDAHHHHH HMGSLQPDAG NASWNGTEAP GGGARATPEN LYFQGNIFEM LRIDEGLRLK IYKDTEGYYT IGIGHLLTKS PSLNAAKSE LDKAIGRNTN GVITKDEAEK LFNQDVDAAV RGILRNAKLK PVYDSLDAVR RAALINMVFQ MGETGVAGFT N SLRMLQQK ...String: DDDDAHHHHH HMGSLQPDAG NASWNGTEAP GGGARATPEN LYFQGNIFEM LRIDEGLRLK IYKDTEGYYT IGIGHLLTKS PSLNAAKSE LDKAIGRNTN GVITKDEAEK LFNQDVDAAV RGILRNAKLK PVYDSLDAVR RAALINMVFQ MGETGVAGFT N SLRMLQQK RWDEAAVNLA KSRWYNQTPN RAKRVITTFR TGTWDAYYSV QATAAIAAAI TFLILFTIFG NALVILAVLT SR SLRAPQN LFLVSLAAAD ILVATLIIPF SLANELLGYW YFRRTWCEVY LALDVLFCTS SIVHLCAISL DRYWAVSRAL EYN SKRTPR RIKCIILTVW LIAAVISLPP LIYKGDQGPQ PRGRPQCKLN QEAWYILASS IGSFFAPCLI MILVYLRIYL IAKR SNRRG PRAKGGPGQG EQWWRRRAQL TREKRFTFVL AVVIGVFVLC WFPFFFSYSL GAICPKHCKV PHGLFQFFFW IGYCN SSLN PVIYTIFNQD FRRAFRRILC RPWTQTAW UniProtKB: Alpha-2A adrenergic receptor, Endolysin, Alpha-2B adrenergic receptor, Alpha-2B adrenergic receptor |
-Macromolecule #5: scFv
Macromolecule | Name: scFv / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 32.898781 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFADV QLVESGGGLV QPGGSRKLSC SASGFAFSSF GMHWVRQAPE KGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSEDT AMYYCVRSIY YYGSSPFDFW GQGTTLTVSS G GGGSGGGG ...String: MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFADV QLVESGGGLV QPGGSRKLSC SASGFAFSSF GMHWVRQAPE KGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSEDT AMYYCVRSIY YYGSSPFDFW GQGTTLTVSS G GGGSGGGG SGGGGSDIVM TQATSSVPVT PGESVSISCR SSKSLLHSNG NTYLYWFLQR PGQSPQLLIY RMSNLASGVP DR FSGSGSG TAFTLTISRL EAEDVGVYYC MQHLEYPLTF GAGTKLELKG SLEVLFQGPA AAHHHHHHHH |
-Macromolecule #6: 4-[(1~{S})-1-(2,3-dimethylphenyl)ethyl]-1~{H}-imidazole
Macromolecule | Name: 4-[(1~{S})-1-(2,3-dimethylphenyl)ethyl]-1~{H}-imidazole type: ligand / ID: 6 / Number of copies: 1 / Formula: CZX |
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Molecular weight | Theoretical: 200.28 Da |
Chemical component information | ![]() ChemComp-CZX: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | 3D array |
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Sample preparation
Concentration | 10 mg/mL |
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Buffer | pH: 7.5 |
Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 400 |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: PDB ENTRY |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 235982 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |