8UTD image
Entry Detail
PDB ID:
8UTD
EMDB ID:
Title:
CryoEM Structure of HCA2-Gi1 in complex with MK-1903
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-10-30
Release Date:
2025-02-26
Method Details:
Experimental Method:
Resolution:
3.24 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(i) subunit alpha-1
Chain IDs:C (auth: A)
Chain Length:354
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Chain IDs:D (auth: B)
Chain Length:358
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Chain IDs:E (auth: C)
Chain Length:71
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:scFv16
Chain IDs:B (auth: D)
Chain Length:267
Number of Molecules:1
Biological Source:Lama glama
Polymer Type:polypeptide(L)
Description:Hydroxycarboxylic acid receptor 2
Mutations:D124A
Chain IDs:A (auth: R)
Chain Length:368
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structure-guided design of a peripherally restricted chemogenetic system.
Cell 187 7433 7449.e20 (2024)
PMID: 39631393 DOI: 10.1016/j.cell.2024.11.001

Abstact

Designer receptors exclusively activated by designer drugs (DREADDs) are chemogenetic tools for remotely controlling cellular signaling, neural activity, behavior, and physiology. Using a structure-guided approach, we provide a peripherally restricted Gi-DREADD, hydroxycarboxylic acid receptor DREADD (HCAD), whose native receptor is minimally expressed in the brain, and a chemical actuator that does not cross the blood-brain barrier (BBB). This was accomplished by combined mutagenesis, analoging via an ultra-large make-on-demand library, structural determination of the designed DREADD receptor via cryoelectron microscopy (cryo-EM), and validation of HCAD function. Expression and activation of HCAD in dorsal root ganglion (DRG) neurons inhibit action potential (AP) firing and reduce both acute and tissue-injury-induced inflammatory pain. The HCAD chemogenetic system expands the possibilities for studying numerous peripheral systems with little adverse effects on the central nervous system (CNS). The structure-guided approach used to generate HCAD also has the potential to accelerate the development of emerging chemogenetic tools for basic and translational sciences.

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Primary Citation of related structures