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- PDB-7ul3: CryoEM Structure of Inactive H2R Bound to Famotidine, Nb6M, and NabFab -

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Basic information

Entry
Database: PDB / ID: 7ul3
TitleCryoEM Structure of Inactive H2R Bound to Famotidine, Nb6M, and NabFab
Components
  • Histamine H2 receptor
  • NabFab HC
  • NabFab LC
  • Nanobody 6M
KeywordsMEMBRANE PROTEIN / Antagonist / Complex
Function / homology
Function and homology information


gastric acid secretion / Histamine receptors / histamine receptor activity / G protein-coupled serotonin receptor activity / neurotransmitter receptor activity / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / positive regulation of vasoconstriction / G alpha (s) signalling events / chemical synaptic transmission / immune response ...gastric acid secretion / Histamine receptors / histamine receptor activity / G protein-coupled serotonin receptor activity / neurotransmitter receptor activity / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / positive regulation of vasoconstriction / G alpha (s) signalling events / chemical synaptic transmission / immune response / synapse / dendrite / plasma membrane
Similarity search - Function
Histamine H2 receptor / Kappa opioid receptor / Opioid receptor / Serpentine type 7TM GPCR chemoreceptor Srsx / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family)
Similarity search - Domain/homology
famotidine / Kappa-type opioid receptor / Histamine H2 receptor
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsRobertson, M.J. / Skiniotis, G.
Funding support United States, 1items
OrganizationGrant numberCountry
The G. Harold and Leila Y. Mathers Foundation United States
CitationJournal: Nat Struct Mol Biol / Year: 2022
Title: Structure determination of inactive-state GPCRs with a universal nanobody.
Authors: Michael J Robertson / Makaía M Papasergi-Scott / Feng He / Alpay B Seven / Justin G Meyerowitz / Ouliana Panova / Maria Claudia Peroto / Tao Che / Georgios Skiniotis /
Abstract: Cryogenic electron microscopy (cryo-EM) has widened the field of structure-based drug discovery by allowing for routine determination of membrane protein structures previously intractable. Despite ...Cryogenic electron microscopy (cryo-EM) has widened the field of structure-based drug discovery by allowing for routine determination of membrane protein structures previously intractable. Despite representing one of the largest classes of therapeutic targets, most inactive-state G protein-coupled receptors (GPCRs) have remained inaccessible for cryo-EM because their small size and membrane-embedded nature impedes projection alignment for high-resolution map reconstructions. Here we demonstrate that the same single-chain camelid antibody (nanobody) recognizing a grafted intracellular loop can be used to obtain cryo-EM structures of inactive-state GPCRs at resolutions comparable or better than those obtained by X-ray crystallography. Using this approach, we obtained structures of neurotensin 1 receptor bound to antagonist SR48692, μ-opioid receptor bound to alvimopan, apo somatostatin receptor 2 and histamine receptor 2 bound to famotidine. We expect this rapid, straightforward approach to facilitate the broad exploration of GPCR inactive states without the need for extensive engineering and crystallization.
History
DepositionApr 3, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 29, 2022Provider: repository / Type: Initial release
Revision 1.1Nov 23, 2022Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.year
Revision 1.2Nov 30, 2022Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.3Dec 28, 2022Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Histamine H2 receptor
C: Nanobody 6M
H: NabFab HC
L: NabFab LC
hetero molecules


Theoretical massNumber of molelcules
Total (without water)108,4725
Polymers108,1324
Non-polymers3391
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Histamine H2 receptor / / H2R / HH2R / Gastric receptor I / kappa-type opioid receptor isoform X1


Mass: 44770.184 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HRH2, OPRK1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P25021, UniProt: A0A8B8VNB6
#2: Antibody Nanobody 6M


Mass: 14418.919 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#3: Antibody NabFab HC


Mass: 25684.463 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#4: Antibody NabFab LC


Mass: 23258.783 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#5: Chemical ChemComp-FO9 / famotidine / Famotidine


Mass: 339.461 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H17N7O2S3 / Feature type: SUBJECT OF INVESTIGATION / Comment: medication, antagonist*YM
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1Complex of H2R, Nb6M, and NabFabCOMPLEX#1-#40RECOMBINANT
2H2RCOMPLEX#11RECOMBINANT
3Nb6MCOMPLEX#41RECOMBINANT
4NabFabCOMPLEX#3-#41RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
33Lama glama (llama)9844
44synthetic construct (others)32630
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Spodoptera frugiperda (fall armyworm)7108
22Spodoptera frugiperda (fall armyworm)7108
33Escherichia coli (E. coli)562
44Escherichia coli (E. coli)562
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1200 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 58.58 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 365068 / Symmetry type: POINT

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