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- EMDB-21972: Human secretin receptor Gs complex -

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Basic information

Entry
Database: EMDB / ID: EMD-21972
TitleHuman secretin receptor Gs complex
Map datapost-processed consensus refinement
Sample
  • Complex: Gs coupled secretin complex with secretin peptide
    • Complex: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2, Secretin receptor
      • Protein or peptide: Secretin receptor
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: Nanobody35
      • Protein or peptide: Nanobody35
    • Complex: Secretin
      • Protein or peptide: Secretin
KeywordsGPCR / Gs coupled / Complex / MEMBRANE PROTEIN
Function / homology
Function and homology information


secretin receptor activity / digestive hormone activity / positive regulation of somatostatin secretion / negative regulation of gastrin-induced gastric acid secretion / positive regulation of pancreatic juice secretion / regulation of appetite / pancreatic juice secretion / intracellular water homeostasis / positive regulation of lipid catabolic process / embryonic digestive tract development ...secretin receptor activity / digestive hormone activity / positive regulation of somatostatin secretion / negative regulation of gastrin-induced gastric acid secretion / positive regulation of pancreatic juice secretion / regulation of appetite / pancreatic juice secretion / intracellular water homeostasis / positive regulation of lipid catabolic process / embryonic digestive tract development / G protein-coupled peptide receptor activity / diet induced thermogenesis / peptide hormone binding / positive regulation of cAMP/PKA signal transduction / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / Hedgehog 'off' state / cytoplasmic microtubule / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / regulation of insulin secretion / cellular response to glucagon stimulus / adenylate cyclase activator activity / hippocampus development / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / G protein-coupled receptor binding / response to nutrient levels / brain development / hormone activity / bone development / regulation of synaptic plasticity / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / platelet aggregation / Olfactory Signaling Pathway / cognition / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / sensory perception of smell / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / positive regulation of cold-induced thermogenesis / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / basolateral plasma membrane / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / cell surface receptor signaling pathway / G protein-coupled receptor signaling pathway / signaling receptor binding
Similarity search - Function
GPCR, family 2, secretin receptor / Secretin precursor / : / 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 ...GPCR, family 2, secretin receptor / Secretin precursor / : / 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 / 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. / WD domain, G-beta repeat / 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
Secretin / Secretin receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Similarity search - Component
Biological speciesHomo sapiens (human) / Lama glama (llama)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.3 Å
AuthorsPiper SJ / Belousoff MJ
Funding support United States, Australia, United Kingdom, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)GM-132095 United States
National Health and Medical Research Council (NHMRC, Australia)1120919 Australia
National Health and Medical Research Council (NHMRC, Australia)1150083 Australia
Royal SocietyBB/M006883/1 United Kingdom
CitationJournal: Nat Commun / Year: 2020
Title: Structure and dynamics of the active Gs-coupled human secretin receptor.
Authors: Maoqing Dong / Giuseppe Deganutti / Sarah J Piper / Yi-Lynn Liang / Maryam Khoshouei / Matthew J Belousoff / Kaleeckal G Harikumar / Christopher A Reynolds / Alisa Glukhova / Sebastian G B ...Authors: Maoqing Dong / Giuseppe Deganutti / Sarah J Piper / Yi-Lynn Liang / Maryam Khoshouei / Matthew J Belousoff / Kaleeckal G Harikumar / Christopher A Reynolds / Alisa Glukhova / Sebastian G B Furness / Arthur Christopoulos / Radostin Danev / Denise Wootten / Patrick M Sexton / Laurence J Miller /
Abstract: The class B secretin GPCR (SecR) has broad physiological effects, with target potential for treatment of metabolic and cardiovascular disease. Molecular understanding of SecR binding and activation ...The class B secretin GPCR (SecR) has broad physiological effects, with target potential for treatment of metabolic and cardiovascular disease. Molecular understanding of SecR binding and activation is important for its therapeutic exploitation. We combined cryo-electron microscopy, molecular dynamics, and biochemical cross-linking to determine a 2.3 Å structure, and interrogate dynamics, of secretin bound to the SecR:Gs complex. SecR exhibited a unique organization of its extracellular domain (ECD) relative to its 7-transmembrane (TM) core, forming more extended interactions than other family members. Numerous polar interactions formed between secretin and the receptor extracellular loops (ECLs) and TM helices. Cysteine-cross-linking, cryo-electron microscopy multivariate analysis and molecular dynamics simulations revealed that interactions between peptide and receptor were dynamic, and suggested a model for initial peptide engagement where early interactions between the far N-terminus of the peptide and SecR ECL2 likely occur following initial binding of the peptide C-terminus to the ECD.
History
DepositionMay 13, 2020-
Header (metadata) releaseAug 12, 2020-
Map releaseAug 12, 2020-
UpdateOct 23, 2024-
Current statusOct 23, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.023
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.023
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6wzg
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_21972.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationpost-processed consensus refinement
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 288 pix.
= 239.04 Å
0.83 Å/pix.
x 288 pix.
= 239.04 Å
0.83 Å/pix.
x 288 pix.
= 239.04 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
Contour LevelBy AUTHOR: 0.01 / Movie #1: 0.023
Minimum - Maximum-0.13152742 - 0.2494202
Average (Standard dev.)0.000102510414 (±0.0038642788)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 239.04 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.830.830.83
M x/y/z288288288
origin x/y/z0.0000.0000.000
length x/y/z239.040239.040239.040
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ250250250
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS288288288
D min/max/mean-0.1320.2490.000

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Supplemental data

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Mask #1

Fileemd_21972_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Additional map: wider mask post-processed consensus refinement

Fileemd_21972_additional_1.map
Annotationwider mask post-processed consensus refinement
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Additional map: Focussed receptor refinement, post-processed

Fileemd_21972_additional_2.map
AnnotationFocussed receptor refinement, post-processed
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Additional map: unsharpened map

Fileemd_21972_additional_3.map
Annotationunsharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Secretin receptor Gs complex half volume map 1

Fileemd_21972_half_map_1.map
AnnotationSecretin receptor Gs complex half volume map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Secretin receptor Gs complex half volume map 2

Fileemd_21972_half_map_2.map
AnnotationSecretin receptor Gs complex half volume map 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Sample components

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Entire : Gs coupled secretin complex with secretin peptide

EntireName: Gs coupled secretin complex with secretin peptide
Components
  • Complex: Gs coupled secretin complex with secretin peptide
    • Complex: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2, Secretin receptor
      • Protein or peptide: Secretin receptor
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: Nanobody35
      • Protein or peptide: Nanobody35
    • Complex: Secretin
      • Protein or peptide: Secretin

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Supramolecule #1: Gs coupled secretin complex with secretin peptide

SupramoleculeName: Gs coupled secretin complex with secretin peptide / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all

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Supramolecule #2: Guanine nucleotide-binding protein G(s) subunit alpha isoforms sh...

SupramoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit ...Name: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2, Secretin receptor
type: complex / ID: 2 / Parent: 1 / Macromolecule list: #2-#5
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: Nanobody35

SupramoleculeName: Nanobody35 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #6
Source (natural)Organism: Lama glama (llama)

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Supramolecule #4: Secretin

SupramoleculeName: Secretin / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Secretin

MacromoleculeName: Secretin / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 3.045436 KDa
SequenceString:
HSDGTFTSEL SRLREGARLQ RLLQGLV

UniProtKB: Secretin

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Macromolecule #2: Secretin receptor

MacromoleculeName: Secretin receptor / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 51.928855 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: DYKDDDDLEV LFQGPAHSTG ALPRLCDVLQ VLWEEQDQCL QELSREQTGD LGTEQPVPGC EGMWDNISCW PSSVPGRMVE VECPRFLRM LTSRNGSLFR NCTQDGWSET FPRPNLACGV NVNDSSNEKR HSYLLKLKVM YTVGYSSSLV MLLVALGILC A FRRLHCTR ...String:
DYKDDDDLEV LFQGPAHSTG ALPRLCDVLQ VLWEEQDQCL QELSREQTGD LGTEQPVPGC EGMWDNISCW PSSVPGRMVE VECPRFLRM LTSRNGSLFR NCTQDGWSET FPRPNLACGV NVNDSSNEKR HSYLLKLKVM YTVGYSSSLV MLLVALGILC A FRRLHCTR NYIHMHLFVS FILRALSNFI KDAVLFSSDD VTYCDAHRAG CKLVMVLFQY CIMANYSWLL VEGLYLHTLL AI SFFSERK YLQGFVAFGW GSPAIFVALW AIARHFLEDV GCWDINANAS IWWIIRGPVI LSILINFILF INILRILMRK LRT QETRGN EVSHYKRLAR STLLLIPLFG IHYIVFAFSP EDAMEIQLFF ELALGSFQGL VVAVLYCFLN GEVQLEVQKK WQQW HLREF PLHPVASFSN STKASHLEQS QGTCRTSIIP AGLEVLFQGP HHHHHHHH

UniProtKB: Secretin receptor

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Macromolecule #3: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 45.699434 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKNTIVKQM RILHVNGFNG EGGEEDPQAA RSNSDGEKA TKVQDIKNNL KEAIETIVAA MSNLVPPVEL ANPENQFRVD YILSVMNVPD FDFPPEFYEH AKALWEDEGV R ACYERSNE ...String:
MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKNTIVKQM RILHVNGFNG EGGEEDPQAA RSNSDGEKA TKVQDIKNNL KEAIETIVAA MSNLVPPVEL ANPENQFRVD YILSVMNVPD FDFPPEFYEH AKALWEDEGV R ACYERSNE YQLIDCAQYF LDKIDVIKQA DYVPSDQDLL RCRVLTSGIF ETKFQVDKVN FHMFDVGAQR DERRKWIQCF ND VTAIIFV VASSSYNMVI REDNQTNRLQ AALKLFDSIW NNKWLRDTSV ILFLNKQDLL AEKVLAGKSK IEDYFPEFAR YTT PEDATP EPGEDPRVTR AKYFIRDEFL RISTASGDGR HYCYPHFTCS VDTENIRRVF NDCRDIIQRM HLRQYELL

UniProtKB: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

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Macromolecule #4: 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: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.41693 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...String:
MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWN

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

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Macromolecule #5: 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: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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

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Macromolecule #6: Nanobody35

MacromoleculeName: Nanobody35 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 15.140742 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
QVQLQESGGG LVQPGGSLRL SCAASGFTFS NYKMNWVRQA PGKGLEWVSD ISQSGASISY TGSVKGRFTI SRDNAKNTLY LQMNSLKPE DTAVYYCARC PAPFTRDCFD VTSTTYAYRG QGTQVTVSSH HHHHHEPEA

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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

Concentration8.1 mg/mL
BufferpH: 7.4
GridMaterial: GOLD
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Detector mode: COUNTING / Average electron dose: 52.9 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 349811
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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