6UUN

CryoEM Structure of the active Adrenomedullin 1 receptor G protein complex with adrenomedullin peptide

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.1 of the entry. See complete history. 


Literature

Structure and Dynamics of Adrenomedullin Receptors AM1and AM2Reveal Key Mechanisms in the Control of Receptor Phenotype by Receptor Activity-Modifying Proteins.

Liang, Y.L., Belousoff, M.J., Fletcher, M.M., Zhang, X., Khoshouei, M., Deganutti, G., Koole, C., Furness, S.G.B., Miller, L.J., Hay, D.L., Christopoulos, A., Reynolds, C.A., Danev, R., Wootten, D., Sexton, P.M.

(2020) Acs Pharmacol Transl Sci 3: 263-284

  • DOI: 10.1021/acsptsci.9b00080
  • Primary Citation of Related Structures:  
    6UUN, 6UUS, 6UVA

  • PubMed Abstract: 

    • Adrenomedullin (AM) and calcitonin gene-related peptide (CGRP) receptors are critically important for metabolism, vascular tone, and inflammatory response. AM receptors are also required for normal lymphatic and blood vascular development and angiogenesis ...

    Adrenomedullin (AM) and calcitonin gene-related peptide (CGRP) receptors are critically important for metabolism, vascular tone, and inflammatory response. AM receptors are also required for normal lymphatic and blood vascular development and angiogenesis. They play a pivotal role in embryo implantation and fertility and can provide protection against hypoxic and oxidative stress. CGRP and AM receptors are heterodimers of the calcitonin receptor-like receptor (CLR) and receptor activity-modifying protein 1 (RAMP1) (CGRPR), as well as RAMP2 or RAMP3 (AM 1 R and AM 2 R, respectively). However, the mechanistic basis for RAMP modulation of CLR phenotype is unclear. In this study, we report the cryo-EM structure of the AM 1 R in complex with AM and Gs at a global resolution of 3.0 Å, and structures of the AM 2 R in complex with either AM or intermedin/adrenomedullin 2 (AM2) and Gs at 2.4 and 2.3 Å, respectively. The structures reveal distinctions in the primary orientation of the extracellular domains (ECDs) relative to the receptor core and distinct positioning of extracellular loop 3 (ECL3) that are receptor-dependent. Analysis of dynamic data present in the cryo-EM micrographs revealed additional distinctions in the extent of mobility of the ECDs. Chimeric exchange of the linker region of the RAMPs connecting the TM helix and the ECD supports a role for this segment in controlling receptor phenotype. Moreover, a subset of the motions of the ECD appeared coordinated with motions of the G protein relative to the receptor core, suggesting that receptor ECD dynamics could influence G protein interactions. This work provides fundamental advances in our understanding of GPCR function and how this can be allosterically modulated by accessory proteins.

    Organizational Affiliation: 

    School of Pharmacy, Fudan University, Shanghai 201203, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms shortA394Homo sapiensMutation(s): 0 
Gene Names: GNAS, GNAS1, GSP
Membrane Entity: Yes 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B350Homo sapiensMutation(s): 0 
Gene Names: GNB1
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Receptor activity-modifying protein 2C [auth E]156Homo sapiensMutation(s): 0 
Gene Names: RAMP2
Membrane Entity: Yes 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2D [auth G]71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody 35E [auth N]138Lama glamaMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
ADMF [auth P]53Homo sapiensMutation(s): 1 
Gene Names: ADM, AM
Membrane Entity: Yes 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Calcitonin gene-related peptide type 1 receptorG [auth R]490Homo sapiensMutation(s): 0 
Gene Names: CALCRL, CGRPR
Membrane Entity: Yes 
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Find proteins for Q16602 (Homo sapiens)
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia1120919
National Health and Medical Research Council (NHMRC, Australia)Australia1159006
National Health and Medical Research Council (NHMRC, Australia)Australia1150083
Japan Society for the Promotion of Science (JSPS)JapanKAKENHI #18H06043
Japan Science and TechnologyJapan#18069571

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-25
    Type: Initial release
  • Version 1.1: 2020-04-29
    Changes: Database references