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- EMDB-0940: Cryo-EM structure of the human PAC1 receptor coupled to an engine... -

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Entry
Database: EMDB / ID: EMD-0940
TitleCryo-EM structure of the human PAC1 receptor coupled to an engineered heterotrimeric G protein
Map dataNone
Sample
  • Complex: PAC1R-Gs trimer
    • Protein or peptide: Pituitary adenylate cyclase-activating polypeptide
    • Protein or peptide: Pituitary adenylate cyclase-activating polypeptide type I receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: nanobody Nb35
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
KeywordsCLASS B GPCR / PACAP / PAC1R / SIGNALING PROTEIN-HORMONE COMPLEX
Function / homology
Function and homology information


negative regulation of response to reactive oxygen species / development of primary female sexual characteristics / pituitary adenylate cyclase activating polypeptide activity / type 1 vasoactive intestinal polypeptide receptor binding / type 2 vasoactive intestinal polypeptide receptor binding / pituitary adenylate cyclase-activating polypeptide receptor activity / vasoactive intestinal polypeptide receptor activity / positive regulation of growth hormone secretion / positive regulation of chemokine (C-C motif) ligand 5 production / NGF-independant TRKA activation ...negative regulation of response to reactive oxygen species / development of primary female sexual characteristics / pituitary adenylate cyclase activating polypeptide activity / type 1 vasoactive intestinal polypeptide receptor binding / type 2 vasoactive intestinal polypeptide receptor binding / pituitary adenylate cyclase-activating polypeptide receptor activity / vasoactive intestinal polypeptide receptor activity / positive regulation of growth hormone secretion / positive regulation of chemokine (C-C motif) ligand 5 production / NGF-independant TRKA activation / neuropeptide hormone activity / regulation of G protein-coupled receptor signaling pathway / neuropeptide binding / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / positive regulation of small GTPase mediated signal transduction / G alpha (z) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G protein-coupled peptide receptor activity / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / insulin secretion / 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 / photoreceptor outer segment membrane / G alpha (s) signalling events / G alpha (q) signalling events / spectrin binding / peptide hormone receptor binding / positive regulation of inositol phosphate biosynthetic process / 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 / alkylglycerophosphoethanolamine phosphodiesterase activity / negative regulation of cell cycle / positive regulation of cAMP/PKA signal transduction / positive regulation of protein kinase activity / peptide hormone binding / positive regulation of calcium ion transport into cytosol / adenylate cyclase binding / cAMP/PKA signal transduction / PKA activation in glucagon signalling / positive regulation of GTPase activity / developmental growth / hair follicle placode formation / photoreceptor outer segment / bicellular tight junction / neuropeptide signaling pathway / D1 dopamine receptor binding / multicellular organismal response to stress / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / activation of adenylate cyclase activity / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / cardiac muscle cell apoptotic process / photoreceptor inner segment / cellular response to glucagon stimulus / regulation of insulin secretion / adenylate cyclase activator activity / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / female pregnancy / bone development / caveola / adenylate cyclase-modulating G protein-coupled receptor signaling pathway
Similarity search - Function
GPCR, family 2, pituitary adenylate cyclase activating polypeptide type 1 receptor / : / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / G-protein coupled receptors family 2 signature 1. / : / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. ...GPCR, family 2, pituitary adenylate cyclase activating polypeptide type 1 receptor / : / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / G-protein coupled receptors family 2 signature 1. / : / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors / Hormone receptor domain / 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. / G-protein alpha subunit, group S / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Pituitary adenylate cyclase-activating polypeptide / Pituitary adenylate cyclase-activating polypeptide type I receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesHomo sapiens (human) / Rattus norvegicus (Norway rat) / unidentified (others) / Bos taurus (domestic cattle)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsKobayashi K / Shihoya W
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: Cryo-EM structure of the human PAC1 receptor coupled to an engineered heterotrimeric G protein.
Authors: Kazuhiro Kobayashi / Wataru Shihoya / Tomohiro Nishizawa / Francois Marie Ngako Kadji / Junken Aoki / Asuka Inoue / Osamu Nureki /
Abstract: Pituitary adenylate cyclase-activating polypeptide (PACAP) is a pleiotropic neuropeptide hormone. The PACAP receptor PAC1R, which belongs to the class B G-protein-coupled receptors (GPCRs), is a drug ...Pituitary adenylate cyclase-activating polypeptide (PACAP) is a pleiotropic neuropeptide hormone. The PACAP receptor PAC1R, which belongs to the class B G-protein-coupled receptors (GPCRs), is a drug target for mental disorders and dry eye syndrome. Here, we present a cryo-EM structure of human PAC1R bound to PACAP and an engineered G heterotrimer. The structure revealed that transmembrane helix TM1 plays an essential role in PACAP recognition. The extracellular domain (ECD) of PAC1R tilts by ~40° compared with that of the glucagon-like peptide-1 receptor (GLP-1R) and thus does not cover the peptide ligand. A functional analysis demonstrated that the PAC1R ECD functions as an affinity trap and is not required for receptor activation, whereas the GLP-1R ECD plays an indispensable role in receptor activation, illuminating the functional diversity of the ECDs in class B GPCRs. Our structural information will facilitate the design and improvement of better PAC1R agonists for clinical applications.
History
DepositionJan 9, 2020-
Header (metadata) releaseMar 11, 2020-
Map releaseMar 11, 2020-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
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  • Surface view colored by cylindrical radius
  • Surface level: 0.05
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  • Surface view with fitted model
  • Atomic models: PDB-6lpb
  • Surface level: 0.05
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-6lpb
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_0940.png

Downloads & links

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Map

FileDownload / File: emd_0940.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationNone
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.3 Å/pix.
x 192 pix.
= 250.38 Å		1.3 Å/pix.
x 192 pix.
= 250.38 Å		1.3 Å/pix.
x 192 pix.
= 250.38 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.30406 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.21909365 - 0.3387776
Average (Standard dev.)0.00044986952 (±0.008806638)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 250.38 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.30406251.30406251.3040625
M x/y/z192192192
origin x/y/z0.0000.0000.000
length x/y/z250.380250.380250.380
α/β/γ90.00090.00090.000
start NX/NY/NZ-200-200-200
NX/NY/NZ401401401
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS192192192
D min/max/mean-0.2190.3390.000

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Supplemental data

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Half map: None

Fileemd_0940_half_map_1.map
AnnotationNone
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: None

Fileemd_0940_half_map_2.map
AnnotationNone
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : PAC1R-Gs trimer

EntireName: PAC1R-Gs trimer
Components
  • Complex: PAC1R-Gs trimer
    • Protein or peptide: Pituitary adenylate cyclase-activating polypeptide
    • Protein or peptide: Pituitary adenylate cyclase-activating polypeptide type I receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: nanobody Nb35
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Supramolecule #1: PAC1R-Gs trimer

SupramoleculeName: PAC1R-Gs trimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Pituitary adenylate cyclase-activating polypeptide

MacromoleculeName: Pituitary adenylate cyclase-activating polypeptide / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 4.547336 KDa
SequenceString:
HSDGIFTDSY SRYRKQMAVK KYLAAVLGKR YKQRVKNK

UniProtKB: Pituitary adenylate cyclase-activating polypeptide

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Macromolecule #2: Pituitary adenylate cyclase-activating polypeptide type I receptor

MacromoleculeName: Pituitary adenylate cyclase-activating polypeptide type I receptor
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 46.67552 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MHSDCIFKKE QAMCLEKIQR ANELMGFNDS SPGCPGMWDN ITCWKPAHVG EMVLVSCPEL FRIFNPDQVW ETETIGESDF GDSNSLDLS DMGVVSRNCT EDGWSEPFPH YFDACGFDEY ESETGDQDYY YLSVKALYTV GYSTSLVTLT TAMVILCRFR K LHCTRNFI ...String:
MHSDCIFKKE QAMCLEKIQR ANELMGFNDS SPGCPGMWDN ITCWKPAHVG EMVLVSCPEL FRIFNPDQVW ETETIGESDF GDSNSLDLS DMGVVSRNCT EDGWSEPFPH YFDACGFDEY ESETGDQDYY YLSVKALYTV GYSTSLVTLT TAMVILCRFR K LHCTRNFI HMNLFVSFML RAISVFIKDW ILYAEQDSNH CFISTVECKA VMVFFHYCVV SNYFWLFIEG LYLFTLLVET FF PERRYFY WYTIIGWGTP TVCVTVWATL RLYFDDTGCW DMNDSTALWW VIKGPVVGSI MVNFVLFIGI IVILVQKLQS PDM GGNESS IYLRLARSTL LLIPLFGIHY TVFAFSPENV SKRERLVFEL GLGSFQGFVV AVLYCFLNGE VQAEIKRKWR SENL YFQ

UniProtKB: Pituitary adenylate cyclase-activating polypeptide type I receptor

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 38.744371 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI ...String:
MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI VTSSGDTTCA LWDIETGQQT TTFTGHTGDV MSLSLAPDTR LFVSGACDAS AKLWDVREGM CRQTFTGHES DI NAICFFP NGNAFATGSD DATCRLFDLR ADQELMTYSH DNIICGITSV SFSKSGRLLL AGYDDFNCNV WDALKADRAG VLA GHDNRV SCLGVTDDGM AVATGSWDSF LKIWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #4: Guanine nucleotide-binding protein G(s) subunit alpha isoforms sh...

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.964734 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: GNSKTEDQRN EEKAQREANK KIEKQLQKDK QVYRATHRLL LLGADNSGKS TIVKQMRILH GGSGGSGGTS GIFETKFQVD KVNFHMFDV GGQRDERRKW IQCFNDVTAI IFVVDSSDYN RLQEALNLFK SIWNNRWLRT ISVILFLNKQ DLLAEKVLAG K SKIEDYFP ...String:
GNSKTEDQRN EEKAQREANK KIEKQLQKDK QVYRATHRLL LLGADNSGKS TIVKQMRILH GGSGGSGGTS GIFETKFQVD KVNFHMFDV GGQRDERRKW IQCFNDVTAI IFVVDSSDYN RLQEALNLFK SIWNNRWLRT ISVILFLNKQ DLLAEKVLAG K SKIEDYFP EFARYTTPED ATPEPGEDPR VTRAKYFIRD EFLRISTASG DGRHYCYPHF TCAVDTENAR RIFNDCRDII QR MHLRQYE LL

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Macromolecule #5: nanobody Nb35

MacromoleculeName: nanobody Nb35 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: unidentified (others)
Molecular weightTheoretical: 15.015728 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MGQVQLQESG GGLVQPGGSL RLSCAASGFT FSNYKMNWVR QAPGKGLEWV SDISQSGASI SYTGSVKGRF TISRDNAKNT LYLQMNSLK PEDTAVYYCA RCPAPFTRDC FDVTSTTYAY RGQGTQVTVS SLHHHHHH

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Macromolecule #6: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 7.547685 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFS

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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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
GridModel: Quantifoil R1.2/1.3 / Material: COPPER/RHODIUM / Mesh: 300
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 64.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 132808
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

5vai


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementProtocol: OTHER
Output model

PDB-6lpb:
Cryo-EM structure of the human PAC1 receptor coupled to an engineered heterotrimeric G protein

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