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- PDB-7knt: CryoEM structure of the apo-CGRP receptor in a detergent micelle -

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Basic information

Entry
Database: PDB / ID: 7knt
TitleCryoEM structure of the apo-CGRP receptor in a detergent micelle
Components
  • Calcitonin gene-related peptide type 1 receptor
  • Receptor activity-modifying protein 1
KeywordsSIGNALING PROTEIN / GPCR / CGRP receptor / apo receptor / MEMBRANE PROTEIN
Function / homology
Function and homology information


calcitonin gene-related peptide binding / CGRP receptor complex / calcitonin gene-related peptide receptor signaling pathway / positive regulation of protein glycosylation / adrenomedullin binding / cellular response to sucrose stimulus / adrenomedullin receptor activity / adrenomedullin receptor complex / adrenomedullin receptor signaling pathway / amylin receptor activity ...calcitonin gene-related peptide binding / CGRP receptor complex / calcitonin gene-related peptide receptor signaling pathway / positive regulation of protein glycosylation / adrenomedullin binding / cellular response to sucrose stimulus / adrenomedullin receptor activity / adrenomedullin receptor complex / adrenomedullin receptor signaling pathway / amylin receptor activity / calcitonin receptor activity / vascular associated smooth muscle cell proliferation / calcitonin gene-related peptide receptor activity / amylin receptor signaling pathway / Calcitonin-like ligand receptors / regulation of G protein-coupled receptor signaling pathway / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / coreceptor activity / cellular response to hormone stimulus / positive regulation of vascular associated smooth muscle cell proliferation / G protein-coupled receptor activity / protein localization to plasma membrane / intracellular protein transport / adenylate cyclase-activating G protein-coupled receptor signaling pathway / receptor internalization / calcium ion transport / protein transport / heart development / G alpha (s) signalling events / angiogenesis / lysosome / cell surface receptor signaling pathway / receptor complex / endosome / G protein-coupled receptor signaling pathway / cell surface / endoplasmic reticulum / plasma membrane / cytoplasm
Similarity search - Function
GPCR, family 2, calcitonin gene-related peptide, type 1 receptor / Receptor activity modifying protein / RAMP domain superfamily / Receptor activity modifying family / GPCR, family 2, calcitonin receptor family / G-protein coupled receptors family 2 signature 1. / Hormone receptor domain / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors ...GPCR, family 2, calcitonin gene-related peptide, type 1 receptor / Receptor activity modifying protein / RAMP domain superfamily / Receptor activity modifying family / GPCR, family 2, calcitonin receptor family / G-protein coupled receptors family 2 signature 1. / Hormone receptor domain / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors / GPCR family 2, extracellular hormone receptor domain superfamily / G-protein coupled receptors family 2 signature 2. / GPCR, family 2, secretin-like, conserved site / GPCR, family 2, secretin-like / 7 transmembrane receptor (Secretin family) / GPCR, family 2-like / G-protein coupled receptors family 2 profile 2.
Similarity search - Domain/homology
Receptor activity-modifying protein 1 / Calcitonin gene-related peptide type 1 receptor
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.15 Å
AuthorsBelousoff, M.J. / Danev, R.
Funding support Australia, 4items
OrganizationGrant numberCountry
National Health and Medical Research Council (NHMRC, Australia)1061044 Australia
National Health and Medical Research Council (NHMRC, Australia)1065410 Australia
National Health and Medical Research Council (NHMRC, Australia)1126857 Australia
National Health and Medical Research Council (NHMRC, Australia)1055134 Australia
CitationJournal: Science / Year: 2021
Title: Structure and dynamics of the CGRP receptor in apo and peptide-bound forms.
Authors: Tracy M Josephs / Matthew J Belousoff / Yi-Lynn Liang / Sarah J Piper / Jianjun Cao / Daniel J Garama / Katie Leach / Karen J Gregory / Arthur Christopoulos / Debbie L Hay / Radostin Danev / ...Authors: Tracy M Josephs / Matthew J Belousoff / Yi-Lynn Liang / Sarah J Piper / Jianjun Cao / Daniel J Garama / Katie Leach / Karen J Gregory / Arthur Christopoulos / Debbie L Hay / Radostin Danev / Denise Wootten / Patrick M Sexton /
Abstract: G protein-coupled receptors (GPCRs) are key regulators of information transmission between cells and organs. Despite this, we have only a limited understanding of the behavior of GPCRs in the apo ...G protein-coupled receptors (GPCRs) are key regulators of information transmission between cells and organs. Despite this, we have only a limited understanding of the behavior of GPCRs in the apo state and the conformational changes upon agonist binding that lead to G protein recruitment and activation. We expressed and purified unmodified apo and peptide-bound calcitonin gene-related peptide (CGRP) receptors from insect cells to determine their cryo-electron microscopy (cryo-EM) structures, and we complemented these with analysis of protein conformational dynamics using hydrogen-deuterium exchange mass spectrometry and three-dimensional variance analysis of the cryo-EM data. Together with our previously published structure of the active, Gs-bound CGRP receptor complex, our work provides insight into the mechanisms of class B1 GPCR activation.
History
DepositionNov 6, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 24, 2021Provider: repository / Type: Initial release
Revision 1.1Mar 3, 2021Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Apr 21, 2021Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation_author.identifier_ORCID

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Structure visualization

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Assembly

Deposited unit
E: Receptor activity-modifying protein 1
R: Calcitonin gene-related peptide type 1 receptor


Theoretical massNumber of molelcules
Total (without water)73,3412
Polymers73,3412
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area4150 Å2
ΔGint-37 kcal/mol
Surface area24390 Å2

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Components

#1: Protein Receptor activity-modifying protein 1 / Calcitonin-receptor-like receptor activity-modifying protein 1 / CRLR activity-modifying protein 1


Mass: 17066.701 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RAMP1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: O60894
#2: Protein Calcitonin gene-related peptide type 1 receptor / CGRP type 1 receptor / Calcitonin receptor-like receptor


Mass: 56274.520 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CALCRL, CGRPR / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q16602

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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

ComponentName: apo CGRP receptor / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.4
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: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 57.3 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.18.2_3874: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.15 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 542650 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0033823
ELECTRON MICROSCOPYf_angle_d0.6055207
ELECTRON MICROSCOPYf_dihedral_angle_d20.477491
ELECTRON MICROSCOPYf_chiral_restr0.038585
ELECTRON MICROSCOPYf_plane_restr0.004637

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