8UHB

Cryo-EM Structure of the Ro5256390-bound hTA1-Gs heterotrimer signaling complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.35 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

Molecular basis of human trace amine-associated receptor 1 activation.

Zilberg, G.Parpounas, A.K.Warren, A.L.Yang, S.Wacker, D.

(2024) Nat Commun 15: 108-108

  • DOI: https://doi.org/10.1038/s41467-023-44601-4
  • Primary Citation of Related Structures:  
    8UHB

  • PubMed Abstract: 

    The human trace amine-associated receptor 1 (hTAAR1, hTA1) is a key regulator of monoaminergic neurotransmission and the actions of psychostimulants. Despite preclinical research demonstrating its tractability as a drug target, its molecular mechanisms of activation remain unclear. Moreover, poorly understood pharmacological differences between rodent and human TA1 complicate the translation of findings from preclinical disease models into novel pharmacotherapies. To elucidate hTA1's mechanisms on the molecular scale and investigate the underpinnings of its divergent pharmacology from rodent orthologs, we herein report the structure of the human TA1 receptor in complex with a Gαs heterotrimer. Our structure reveals shared structural elements with other TAARs, as well as with its closest monoaminergic orthologue, the serotonin receptor 5-HT4R. We further find that a single mutation dramatically shifts the selectivity of hTA1 towards that of its rodent orthologues, and report on the effects of substituting residues to those found in serotonin and dopamine receptors. Strikingly, we also discover that the atypical antipsychotic medication and pan-monoaminergic antagonist asenapine potently and efficaciously activates hTA1. Together our studies provide detailed insight into hTA1 structure and function, contrast its molecular pharmacology with that of related receptors, and uncover off-target activities of monoaminergic drugs at hTA1.


  • Organizational Affiliation

    Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA. greg.zilberg@icahn.mssm.edu.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Soluble cytochrome b562,Beta-2 adrenergic receptor,Trace amine-associated receptor 1524Homo sapiensMutation(s): 4 
Gene Names: cybCADRB2TAAR1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Find proteins for P07550 (Homo sapiens)
Explore P07550 
Go to UniProtKB:  P07550
PHAROS:  P07550
GTEx:  ENSG00000169252 
Find proteins for Q96RJ0 (Homo sapiens)
Explore Q96RJ0 
Go to UniProtKB:  Q96RJ0
PHAROS:  Q96RJ0
GTEx:  ENSG00000146399 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0ABE7P07550Q96RJ0
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1358Homo sapiensMutation(s): 0 
Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens)
Explore P62873 
Go to UniProtKB:  P62873
PHAROS:  P62873
GTEx:  ENSG00000078369 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62873
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short394Rattus norvegicusMutation(s): 11 
Gene Names: Gnas
Membrane Entity: Yes 
UniProt
Find proteins for P63095 (Rattus norvegicus)
Explore P63095 
Go to UniProtKB:  P63095
Entity Groups  
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UniProt GroupP63095
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Entity ID: 4
MoleculeChains Sequence 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 
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens)
Explore P59768 
Go to UniProtKB:  P59768
PHAROS:  P59768
GTEx:  ENSG00000186469 
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UniProt GroupP59768
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Nanobody 35E [auth N]134Lama glamaMutation(s): 0 
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
WV8 (Subject of Investigation/LOI)
Query on WV8

Download Ideal Coordinates CCD File 
F [auth A](2R,4S)-4-[(2S)-2-phenylbutyl]-1,3-oxazolidin-2-amine
C13 H18 N2 O
IXDKFUBXESWHSL-JQWIXIFHSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
WV8 BindingDB:  8UHB EC50: 18 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM133504
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)United StatesMH132317
National Institutes of Health/National Institute on Drug Abuse (NIH/NIDA)United StatesDA053558
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM062754

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-10
    Type: Initial release
  • Version 1.1: 2024-05-01
    Changes: Database references