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- EMDB-60650: Cryo-EM Structure of SSTR1-Gi SST analogs complex -

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Entry
Database: EMDB / ID: EMD-60650
TitleCryo-EM Structure of SSTR1-Gi SST analogs complex
Map data
Sample
  • Complex: Cryo-EM structure of SSTR1-Gi complex
    • Protein or peptide: Somatostatin receptor type 1
    • Protein or peptide: scFv16
    • 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
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
  • Protein or peptide: DTR-LYS-TY5-PHA-A1D5E-004
KeywordsSSTR1 / SST analogs / MEMBRANE PROTEIN
Function / homology
Function and homology information


somatostatin receptor activity / neuropeptide binding / glutamate receptor signaling pathway / response to starvation / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / positive regulation of protein localization to cell cortex / Adenylate cyclase inhibitory pathway / T cell migration / forebrain development ...somatostatin receptor activity / neuropeptide binding / glutamate receptor signaling pathway / response to starvation / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / positive regulation of protein localization to cell cortex / Adenylate cyclase inhibitory pathway / T cell migration / forebrain development / D2 dopamine receptor binding / response to prostaglandin E / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cellular response to forskolin / cerebellum development / regulation of mitotic spindle organization / cellular response to leukemia inhibitory factor / Peptide ligand-binding receptors / Regulation of insulin secretion / cellular response to estradiol stimulus / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / response to peptide hormone / G-protein beta/gamma-subunit complex binding / centriolar satellite / Olfactory Signaling Pathway / 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 / 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 / GDP binding / 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 / 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) / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / midbody / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / 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 / spermatogenesis / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / neuron projection / ciliary basal body / G protein-coupled receptor signaling pathway / lysosomal membrane / negative regulation of cell population proliferation / cell division / GTPase activity / synapse / centrosome / protein-containing complex binding / GTP binding / nucleolus / magnesium ion binding / Golgi apparatus / signal transduction
Similarity search - Function
Somatostatin receptor 1 / Somatostatin receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 ...Somatostatin receptor 1 / Somatostatin receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / 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
Somatostatin receptor type 1 / 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) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.82 Å
AuthorsWong TS / Zeng ZC / Xiong TT / Gan SY / Du Y
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Acta Pharm Sin B / Year: 2025
Title: Structural insights into the binding modes of lanreotide and pasireotide with somatostatin receptor 1
Authors: Zeng Z / Liao Q / Gan S / Li X / Xiong T / Xu L / Li D / Jiang Y / Chen J / Ye R / Du Y / Wong T
History
DepositionJun 26, 2024-
Header (metadata) releaseApr 30, 2025-
Map releaseApr 30, 2025-
UpdateApr 30, 2025-
Current statusApr 30, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_60650.png

Downloads & links

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Map

FileDownload / File: emd_60650.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 384 pix.
= 318.72 Å		0.83 Å/pix.
x 384 pix.
= 318.72 Å		0.83 Å/pix.
x 384 pix.
= 318.72 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: 0.12
Minimum - Maximum-2.2216468 - 3.1809382
Average (Standard dev.)-0.00024996157 (±0.03692378)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 318.72 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_60650_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_60650_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Cryo-EM structure of SSTR1-Gi complex

EntireName: Cryo-EM structure of SSTR1-Gi complex
Components
  • Complex: Cryo-EM structure of SSTR1-Gi complex
    • Protein or peptide: Somatostatin receptor type 1
    • Protein or peptide: scFv16
    • 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
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
  • Protein or peptide: DTR-LYS-TY5-PHA-A1D5E-004

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Supramolecule #1: Cryo-EM structure of SSTR1-Gi complex

SupramoleculeName: Cryo-EM structure of SSTR1-Gi complex / 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 1

MacromoleculeName: Somatostatin receptor type 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 42.960273 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MFPNGTASSP SSSPSPSPGS CGEGGGSRGP GAGAADGMEE PGRNASQNGT LSEGQGSAIL ISFIYSVVCL VGLCGNSMVI YVILRYAKM KTATNIYILN LAIADELLML SVPFLVTSTL LRHWPFGALL CRLVLSVDAV NMFTSIYCLT VLSVDRYVAV V HPIKAARY ...String:
MFPNGTASSP SSSPSPSPGS CGEGGGSRGP GAGAADGMEE PGRNASQNGT LSEGQGSAIL ISFIYSVVCL VGLCGNSMVI YVILRYAKM KTATNIYILN LAIADELLML SVPFLVTSTL LRHWPFGALL CRLVLSVDAV NMFTSIYCLT VLSVDRYVAV V HPIKAARY RRPTVAKVVN LGVWVLSLLV ILPIVVFSRT AANSDGTVAC NMLMPEPAQR WLVGFVLYTF LMGFLLPVGA IC LCYVLII AKMRMVALKA GWQQRKRSER KITLMVMMVV MVFVICWMPF YVVQLVNVFA EQDDATVSQL SVILGYANSC ANP ILYGFL SDNFKRSFQR ILCLSWMDNA AEEPVDYYAT ALKSRAYSVE DFQPENLESG GVFRNGTCTS RITTLLE

UniProtKB: Somatostatin receptor type 1

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Macromolecule #2: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 36.399676 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS SGGGGSGGGG SGGGGSDIVM TQATSSVPVT PGESVSISCR S SKSLLHSN ...String:
VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS SGGGGSGGGG SGGGGSDIVM TQATSSVPVT PGESVSISCR S SKSLLHSN GNTYLYWFLQ RPGQSPQLLI YRMSNLASGV PDRFSGSGSG TAFTLTISRL EAEDVGVYYC MQHLEYPLTF GA GTKLELS ISCRSSKSLL HSNGNTYLYW FLQRPGQSPQ LLIYRMSNLA SGVPDRFSGS GSGTAFTLTI SRLEAEDVGV YYC MQHLEY PLTFGAGTKL EL

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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: Homo sapiens (human)
Molecular weightTheoretical: 41.276254 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHHHH HLEVLFQGPG SSGSELDQLR QEAEQLKNQI RDARKACADA TLSQITNNID PVGRIQMRTR RTLRGHLAKI YAMHWGTDS RLLVSASQDG KLIIWDSYTT NKVHAIPLRS SWVMTCAYAP SGNYVACGGL DNICSIYNLK TREGNVRVSR E LAGHTGYL ...String:
MHHHHHHHHH HLEVLFQGPG SSGSELDQLR QEAEQLKNQI RDARKACADA TLSQITNNID PVGRIQMRTR RTLRGHLAKI YAMHWGTDS RLLVSASQDG KLIIWDSYTT NKVHAIPLRS SWVMTCAYAP SGNYVACGGL DNICSIYNLK TREGNVRVSR E LAGHTGYL SCCRFLDDNQ IVTSSGDTTC ALWDIETGQQ TTTFTGHTGD VMSLSLAPDT RLFVSGACDA SAKLWDVREG MC RQTFTGH ESDINAICFF PNGNAFATGS DDATCRLFDL RADQELMTYS HDNIICGITS VSFSKSGRLL LAGYDDFNCN VWD ALKADR AGVLAGHDNR VSCLGVTDDG MAVATGSWDS FLKIWNVSGW RLFKKIS

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(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: Spodoptera frugiperda (fall armyworm)
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) subunit alpha-1

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.022543 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: LSAEDKAAVE RSKMIDRNLR EDGEKAAREV KLLLLGAGES GKSTIVKQMK IIHEAGYSEE ECKQYKAVVY SNTIQSIIAI IRAMGRLKI DFGDSARADD ARQLFVLAGA AEEGFMTAEL AGVIKRLWKD SGVQACFNRS REYQLNDSAA YYLNDLDRIA Q PNYIPTQQ ...String:
LSAEDKAAVE RSKMIDRNLR EDGEKAAREV KLLLLGAGES GKSTIVKQMK IIHEAGYSEE ECKQYKAVVY SNTIQSIIAI IRAMGRLKI DFGDSARADD ARQLFVLAGA AEEGFMTAEL AGVIKRLWKD SGVQACFNRS REYQLNDSAA YYLNDLDRIA Q PNYIPTQQ DVLRTRVKTT GIVETHFTFK DLHFKMFDVG GQRSERKKWI HCFEGVTAII FCVALSDYDL VLAEDEEMNR MH ESMKLFD SICNNKWFTD TSIILFLNKK DLFEEKIKKS PLTICYPEYA GSNTYEEAAA YIQCQFEDLN KRKDTKEIYT HFT CATDTK NVQFVFDAVT DVIIKNNLKD CGLF

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

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Macromolecule #6: DTR-LYS-TY5-PHA-A1D5E-004

MacromoleculeName: DTR-LYS-TY5-PHA-A1D5E-004 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 1.05023 KDa
SequenceString:
(DTR)K(TY5)(PHA)(A1D5E)(004)

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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
Sugar embeddingMaterial: vitreous ice
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Average electron dose: 53.5 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: OTHER
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.4000000000000001 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.82 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 722906
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
FSC plot (resolution estimation)

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