6LML

Cryo-EM structure of the human glucagon receptor in complex with Gi1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis of Gsand Girecognition by the human glucagon receptor.

Qiao, A.Han, S.Li, X.Li, Z.Zhao, P.Dai, A.Chang, R.Tai, L.Tan, Q.Chu, X.Ma, L.Thorsen, T.S.Reedtz-Runge, S.Yang, D.Wang, M.W.Sexton, P.M.Wootten, D.Sun, F.Zhao, Q.Wu, B.

(2020) Science 367: 1346-1352

  • DOI: 10.1126/science.aaz5346
  • Primary Citation of Related Structures:  
    6LML, 6LMK

  • PubMed Abstract: 
  • Class B G protein-coupled receptors, an important class of therapeutic targets, signal mainly through the G s class of heterotrimeric G proteins, although they do display some promiscuity in G protein binding. Using cryo-electron microscopy, we determined the structures of the human glucagon receptor (GCGR) bound to glucagon and distinct classes of heterotrimeric G proteins, G s or G i1 These two structures adopt a similar open binding cavity to accommodate G s and G i1 The G s binding selectivity of GCGR is explained by a larger interaction interface, but there are specific interactions that affect G i more than G s binding ...

    Class B G protein-coupled receptors, an important class of therapeutic targets, signal mainly through the G s class of heterotrimeric G proteins, although they do display some promiscuity in G protein binding. Using cryo-electron microscopy, we determined the structures of the human glucagon receptor (GCGR) bound to glucagon and distinct classes of heterotrimeric G proteins, G s or G i1 These two structures adopt a similar open binding cavity to accommodate G s and G i1 The G s binding selectivity of GCGR is explained by a larger interaction interface, but there are specific interactions that affect G i more than G s binding. Conformational differences in the receptor intracellular loops were found to be key selectivity determinants. These distinctions in transducer engagement were supported by mutagenesis and functional studies.


    Organizational Affiliation

    CAS Center for Excellence in Biomacromolecules, Chinese Academy of Sciences, Beijing 100101, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1A354Homo sapiensMutation(s): 4 
Gene Names: GNAI1
Membrane Entity: Yes 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B351Homo sapiensMutation(s): 0 
Gene Names: GNB1
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
scFv16D247Mus musculusMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
GlucagonE29Homo sapiensMutation(s): 0 
Gene Names: GCG
Membrane Entity: Yes 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Glucagon receptorF [auth R]422Homo sapiensMutation(s): 3 
Gene Names: GCGR
Membrane Entity: Yes 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2018YFA0507000
Ministry of Science and Technology (MoST, China)China2017YFA0504703
National Science Foundation (NSF, China)China31825010
National Science Foundation (NSF, China)China81525024
National Science Foundation (NSF, China)China31830020
Chinese Academy of SciencesChinaQYZDB-SSW-SMC024
Chinese Academy of SciencesChinaQYZDB-SSW-SMC054
Ministry of Science and Technology (MoST, China)China2018ZX09711002

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-01
    Type: Initial release