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- EMDB-22962: CryoEM structure of the apo-CGRP receptor in a detergent micelle -

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Basic information

Entry
Database: EMDB / ID: EMD-22962
TitleCryoEM structure of the apo-CGRP receptor in a detergent micelle
Map dataMain map output from cryoSPARC, non-uniform refinement
Sample
  • Complex: apo CGRP receptor
    • Protein or peptide: Receptor activity-modifying protein 1
    • Protein or peptide: Calcitonin gene-related peptide type 1 receptor
Function / homology
Function and homology information


calcitonin gene-related peptide binding / CGRP receptor complex / calcitonin gene-related peptide receptor signaling pathway / adrenomedullin binding / positive regulation of protein glycosylation / 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 / adrenomedullin binding / positive regulation of protein glycosylation / 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)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.15 Å
AuthorsBelousoff MJ / Danev R
Funding support Australia, 4 items
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, 2020-
Header (metadata) releaseFeb 24, 2021-
Map releaseFeb 24, 2021-
UpdateApr 21, 2021-
Current statusApr 21, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.277
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.277
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7knt
  • Surface level: 0.277
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7knt
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22962.png

Downloads & links

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Map

FileDownload / File: emd_22962.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMain map output from cryoSPARC, non-uniform refinement
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 240 pix.
= 199.2 Å		0.83 Å/pix.
x 240 pix.
= 199.2 Å		0.83 Å/pix.
x 240 pix.
= 199.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.277 / Movie #1: 0.277
Minimum - Maximum-0.7466571 - 1.1903777
Average (Standard dev.)-0.0004136011 (±0.03664197)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 199.2 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.830.830.83
M x/y/z240240240
origin x/y/z0.0000.0000.000
length x/y/z199.200199.200199.200
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS240240240
D min/max/mean-0.7471.190-0.000

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Supplemental data

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Mask #1

Fileemd_22962_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Map refined using the SIDESPLITTER reconstruction in combination...

Fileemd_22962_additional_1.map
AnnotationMap refined using the SIDESPLITTER reconstruction in combination with RELION 3.1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map1

Fileemd_22962_half_map_1.map
AnnotationHalf map1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map2

Fileemd_22962_half_map_2.map
AnnotationHalf map2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : apo CGRP receptor

EntireName: apo CGRP receptor
Components
  • Complex: apo CGRP receptor
    • Protein or peptide: Receptor activity-modifying protein 1
    • Protein or peptide: Calcitonin gene-related peptide type 1 receptor

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Supramolecule #1: apo CGRP receptor

SupramoleculeName: apo CGRP receptor / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)

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Macromolecule #1: Receptor activity-modifying protein 1

MacromoleculeName: Receptor activity-modifying protein 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 17.066701 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MKTIIALSYI FCLVFADYKD DDDKHGSCQE ANYGALLREL CLTQFQVDME AVGETLWCDW GRTIRSYREL ADCTWHMAEK LGCFWPNAE VDRFFLAVHG RYFRSCPISG RAVRDPPGSI LYPFIVVPIT VTLLVTALVV WQSKRTEGIV

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Macromolecule #2: Calcitonin gene-related peptide type 1 receptor

MacromoleculeName: Calcitonin gene-related peptide type 1 receptor / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 56.27452 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MKTIIALSYI FCLVFADYKD DDDLEVLFQG PAELEESPED SIQLGVTRNK IMTAQYECYQ KIMQDPIQQA EGVYCNRTWD GWLCWNDVA AGTESMQLCP DYFQDFDPSE KVTKICDQDG NWFRHPASNR TWTNYTQCNV NTHEKVKTAL NLFYLTIIGH G LSIASLLI ...String:
MKTIIALSYI FCLVFADYKD DDDLEVLFQG PAELEESPED SIQLGVTRNK IMTAQYECYQ KIMQDPIQQA EGVYCNRTWD GWLCWNDVA AGTESMQLCP DYFQDFDPSE KVTKICDQDG NWFRHPASNR TWTNYTQCNV NTHEKVKTAL NLFYLTIIGH G LSIASLLI SLGIFFYFKS LSCQRITLHK NLFFSFVCNS VVTIIHLTAV ANNQALVATN PVSCKVSQFI HLYLMGCNYF WM LCEGIYL HTLIVVAVFA EKQHLMWYYF LGWGFPLIPA CIHAIARSLY YNDNCWISSD THLLYIIHGP ICAALLVNLF FLL NIVRVL ITKLKVTHQA ESNLYMKAVR ATLILVPLLG IEFVLIPWRP EGKIAEEVYD YIMHILMHFQ GLLVSTIFCF FNGE VQAIL RRNWNQYKIQ FGNSFSNSEA LRSASYTVST ISDGPGYSHD CPSEHLNGKS IHDIENVLLK PENLYNPAGL EVLFQ GPHH HHHHHH

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 57.3 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.15 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 542650

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