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- EMDB-33304: CryoEM structure of somatostatin receptor 4 (SSTR4) with Gi1 and ... -

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Entry
Database: EMDB / ID: EMD-33304
TitleCryoEM structure of somatostatin receptor 4 (SSTR4) with Gi1 and J-2156
Map data
Sample
  • Complex: Complex structure of somatostatin receptor 4 (SSTR4) with Gi and J-2156
    • Protein or peptide: Somatostatin receptor type 4
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: single chain variable fragment of antibody
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
  • Ligand: (2~{S})-2-[[(2~{S})-4-azanyl-2-[(4-methylnaphthalen-1-yl)sulfonylamino]butanoyl]amino]-3-phenyl-propanimidic acid
KeywordsG protein-coupled receptor / somatostatin receptor 2 / cryo-EM / STRUCTURAL PROTEIN
Function / homology
Function and homology information


somatostatin receptor activity / neuropeptide binding / cellular response to glucocorticoid stimulus / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / regulation of eating behavior / adenylate cyclase inhibitor activity / T cell migration / positive regulation of protein localization to cell cortex / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway ...somatostatin receptor activity / neuropeptide binding / cellular response to glucocorticoid stimulus / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / regulation of eating behavior / adenylate cyclase inhibitor activity / T cell migration / positive regulation of protein localization to cell cortex / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / cellular response to forskolin / regulation of mitotic spindle organization / Peptide ligand-binding receptors / mast cell degranulation / chemokine-mediated signaling pathway / neuropeptide signaling pathway / Regulation of insulin secretion / response to prostaglandin E / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / response to peptide hormone / G-protein beta/gamma-subunit complex binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / GDP binding / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Glucagon-type ligand receptors / Sensory perception of sweet, bitter, and umami (glutamate) taste / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / G alpha (12/13) signalling events / G-protein beta-subunit binding / extracellular vesicle / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / adenylate cyclase-activating G protein-coupled receptor signaling pathway / GTPase binding / G protein activity / midbody / Ca2+ pathway / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / ciliary basal body / G alpha (s) signalling events / G alpha (q) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / Ras protein signal transduction / Extra-nuclear estrogen signaling / neuron projection / G protein-coupled receptor signaling pathway / negative regulation of cell population proliferation / cell division / lysosomal membrane / GTPase activity / centrosome / synapse / GTP binding / protein-containing complex binding / magnesium ion binding / signal transduction / extracellular exosome / membrane / nucleus / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Somatostatin receptor 4 / Somatostatin receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit / G-protein alpha subunit / G-alpha domain profile. / G-protein, gamma subunit ...Somatostatin receptor 4 / Somatostatin receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit / G-protein alpha subunit / G-alpha domain profile. / 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 coupled receptors family 1 signature. / 7 transmembrane receptor (rhodopsin family) / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 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
Somatostatin receptor type 4 / 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(i) subunit alpha-1
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsWenli Z / Shuo H / Na Q / Wenbo Z / Mengjie L / Dehua Y / Ming-Wei W / Wu B / Zhao Q
Funding support China, 8 items
OrganizationGrant numberCountry
National Science Foundation (NSF, China)32161133011 China
National Science Foundation (NSF, China)31825010 China
National Science Foundation (NSF, China)82121005 China
National Science Foundation (NSF, China)81872915 China
National Science Foundation (NSF, China)82073904 China
National Science Foundation (NSF, China)81773792 China
National Science Foundation (NSF, China)81973373 China
National Science Foundation (NSF, China)21704064 China
CitationJournal: Cell Res / Year: 2022
Title: Structural insights into ligand recognition and selectivity of somatostatin receptors.
Authors: Wenli Zhao / Shuo Han / Na Qiu / Wenbo Feng / Mengjie Lu / Wenru Zhang / Mu Wang / Qingtong Zhou / Shutian Chen / Wei Xu / Juan Du / Xiaojing Chu / Cuiying Yi / Antao Dai / Liaoyuan Hu / ...Authors: Wenli Zhao / Shuo Han / Na Qiu / Wenbo Feng / Mengjie Lu / Wenru Zhang / Mu Wang / Qingtong Zhou / Shutian Chen / Wei Xu / Juan Du / Xiaojing Chu / Cuiying Yi / Antao Dai / Liaoyuan Hu / Michelle Y Shen / Yaping Sun / Qing Zhang / Yingli Ma / Wenge Zhong / Dehua Yang / Ming-Wei Wang / Beili Wu / Qiang Zhao /
Abstract: Somatostatin receptors (SSTRs) play versatile roles in inhibiting the secretion of multiple hormones such as growth hormone and thyroid-stimulating hormone, and thus are considered as targets for ...Somatostatin receptors (SSTRs) play versatile roles in inhibiting the secretion of multiple hormones such as growth hormone and thyroid-stimulating hormone, and thus are considered as targets for treating multiple tumors. Despite great progress made in therapeutic development against this diverse receptor family, drugs that target SSTRs still show limited efficacy with preferential binding affinity and conspicuous side-effects. Here, we report five structures of SSTR2 and SSTR4 in different states, including two crystal structures of SSTR2 in complex with a selective peptide antagonist and a non-peptide agonist, respectively, a cryo-electron microscopy (cryo-EM) structure of G-bound SSTR2 in the presence of the endogenous ligand SST-14, as well as two cryo-EM structures of G-bound SSTR4 in complex with SST-14 and a small-molecule agonist J-2156, respectively. By comparison of the SSTR structures in different states, molecular mechanisms of agonism and antagonism were illustrated. Together with computational and functional analyses, the key determinants responsible for ligand recognition and selectivity of different SSTR subtypes and multiform binding modes of peptide and non-peptide ligands were identified. Insights gained in this study will help uncover ligand selectivity of various SSTRs and accelerate the development of new molecules with better efficacy by targeting SSTRs.
History
DepositionApr 26, 2022-
Header (metadata) releaseAug 3, 2022-
Map releaseAug 3, 2022-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33304.png

Downloads & links

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Map

FileDownload / File: emd_33304.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 256 pix.
= 267.52 Å		1.05 Å/pix.
x 256 pix.
= 267.52 Å		1.05 Å/pix.
x 256 pix.
= 267.52 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.045 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.025
Minimum - Maximum-0.19749762 - 0.25723502
Average (Standard dev.)0.0000017855992 (±0.0050810534)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 267.52 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_33304_half_map_1.map
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Half map: #1

Fileemd_33304_half_map_2.map
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Sample components

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Entire : Complex structure of somatostatin receptor 4 (SSTR4) with Gi and ...

EntireName: Complex structure of somatostatin receptor 4 (SSTR4) with Gi and J-2156
Components
  • Complex: Complex structure of somatostatin receptor 4 (SSTR4) with Gi and J-2156
    • Protein or peptide: Somatostatin receptor type 4
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: single chain variable fragment of antibody
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
  • Ligand: (2~{S})-2-[[(2~{S})-4-azanyl-2-[(4-methylnaphthalen-1-yl)sulfonylamino]butanoyl]amino]-3-phenyl-propanimidic acid

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Supramolecule #1: Complex structure of somatostatin receptor 4 (SSTR4) with Gi and ...

SupramoleculeName: Complex structure of somatostatin receptor 4 (SSTR4) with Gi and J-2156
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Somatostatin receptor type 4

MacromoleculeName: Somatostatin receptor type 4 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.667375 KDa
Recombinant expressionOrganism: Insecta environmental sample (insect)
SequenceString: DYKDDDDGAP SAPSTLPPGG EEGLGTAWPS AANASSAPAE AEEAVAGPGD ARAAGMVAIQ CIYALVCLVG LVGNALVIFV ILRYAKMKT ATNIYLLNLA VADELFMLSV PFVASSAALR HWPFGSVLCR AVLSVDGLNM FTSVFCLTVL SVDRYVAVVH P LRAATYRR ...String:
DYKDDDDGAP SAPSTLPPGG EEGLGTAWPS AANASSAPAE AEEAVAGPGD ARAAGMVAIQ CIYALVCLVG LVGNALVIFV ILRYAKMKT ATNIYLLNLA VADELFMLSV PFVASSAALR HWPFGSVLCR AVLSVDGLNM FTSVFCLTVL SVDRYVAVVH P LRAATYRR PSVAKLINLG VWLASLLVTL PIAIFADTRP ARGGQAVACN LQWPHPAWSA VFVVYTFLLG FLLPVLAIGL CY LLIVGKM RAVALRAGWQ QRRRSEKKIT RLVLMFVVVF VLCWMPFYVV QLLNLFVTSL DATVNHVSLI LSYANSCANP ILY GFLSDN FRRFFQRVLC LEFLEVLFQG PWSHPQFEKG GGSGGGSGGS AWSHPQFEK

UniProtKB: Somatostatin receptor type 4

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Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-1

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.447141 KDa
Recombinant expressionOrganism: Insecta environmental sample (insect)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKCTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKCTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVTAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHASM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKDCGLF

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1

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Macromolecule #3: single chain variable fragment of antibody

MacromoleculeName: single chain variable fragment of antibody / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 31.549107 KDa
Recombinant expressionOrganism: Insecta environmental sample (insect)
SequenceString: MKTIIALSYI FCLVFADYKD DDDGAPSEPD VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS SGGGGSGGGG S GGGGSDIV ...String:
MKTIIALSYI FCLVFADYKD DDDGAPSEPD VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS SGGGGSGGGG S GGGGSDIV MTQATSSVPV TPGESVSISC RSSKSLLHSN GNTYLYWFLQ RPGQSPQLLI YRMSNLASGV PDRFSGSGSG TA FTLTISR LEAEDVGVYY CMQHLEYPLT FGAGTKLELE FLEVLFQGPH HHHHH

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Macromolecule #4: 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: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Insecta environmental sample (insect)
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 #5: 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: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.744371 KDa
Recombinant expressionOrganism: Insecta environmental sample (insect)
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 #6: (2~{S})-2-[[(2~{S})-4-azanyl-2-[(4-methylnaphthalen-1-yl)sulfonyl...

MacromoleculeName: (2~{S})-2-[[(2~{S})-4-azanyl-2-[(4-methylnaphthalen-1-yl)sulfonylamino]butanoyl]amino]-3-phenyl-propanimidic acid
type: ligand / ID: 6 / Number of copies: 1 / Formula: I8B
Molecular weightTheoretical: 468.569 Da
Chemical component information

ChemComp-I8B:
(2~{S})-2-[[(2~{S})-4-azanyl-2-[(4-methylnaphthalen-1-yl)sulfonylamino]butanoyl]amino]-3-phenyl-propanimidic acid

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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: 7.5
GridMaterial: NICKEL/TITANIUM
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.3000000000000003 µm / Nominal defocus min: 1.3 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 600908
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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