6WZG

Human secretin receptor Gs complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure and dynamics of the active Gs-coupled human secretin receptor.

Dong, M.Deganutti, G.Piper, S.J.Liang, Y.L.Khoshouei, M.Belousoff, M.J.Harikumar, K.G.Reynolds, C.A.Glukhova, A.Furness, S.G.B.Christopoulos, A.Danev, R.Wootten, D.Sexton, P.M.Miller, L.J.

(2020) Nat Commun 11: 4137-4137

  • DOI: 10.1038/s41467-020-17791-4
  • Primary Citation of Related Structures:  
    6WZG, 6WI9

  • PubMed 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 is important for its therapeutic exploitation. We combined cryo-electron microscopy, molecular dynamics, and biochemical cross-linking to determine a 2 ...

    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.


    Organizational Affiliation

    Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Scottsdale, AZ, 85259, USA. miller@mayo.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SecretinA [auth P]27Homo sapiensMutation(s): 0 
Gene Names: SCT
Membrane Entity: Yes 
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PHAROS:  P09683
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Secretin receptorB [auth R]453Homo sapiensMutation(s): 0 
Gene Names: SCTR
Membrane Entity: Yes 
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Find proteins for P47872 (Homo sapiens)
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PHAROS:  P47872
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms shortC [auth A]394Homo sapiensMutation(s): 0 
Gene Names: GNASGNAS1GSP
Membrane Entity: Yes 
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Find proteins for P63092 (Homo sapiens)
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PHAROS:  P63092
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1D [auth B]340Homo sapiensMutation(s): 0 
Gene Names: GNB1
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Find proteins for P62873 (Homo sapiens)
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PHAROS:  P62873
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2E [auth G]71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Find proteins for P59768 (Homo sapiens)
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody35F [auth N]138Lama glamaMutation(s): 0 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesGM-132095
National Health and Medical Research Council (NHMRC, Australia)Australia1120919
National Health and Medical Research Council (NHMRC, Australia)Australia1150083
Royal SocietyUnited KingdomBB/M006883/1

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-12
    Type: Initial release
  • Version 1.1: 2020-09-02
    Changes: Database references