8BVT image
Entry Detail
PDB ID:
8BVT
EMDB ID:
Title:
Cryo-EM structure of rat SLC22A6 bound to probenecid
Biological Source:
PDB Version:
Deposition Date:
2022-12-06
Release Date:
2023-07-19
Method Details:
Experimental Method:
Resolution:
3.94 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Solute carrier family 22 member 6
Chain IDs:A
Chain Length:547
Number of Molecules:1
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Synthetic nanobody (Sybody)
Chain IDs:B
Chain Length:146
Number of Molecules:1
Biological Source:synthetic construct
Ligand Molecules
Primary Citation
Molecular basis for selective uptake and elimination of organic anions in the kidney by OAT1.
Nat.Struct.Mol.Biol. 30 1786 1793 (2023)
PMID: 37482561 DOI: 10.1038/s41594-023-01039-y

Abstact

In mammals, the kidney plays an essential role in maintaining blood homeostasis through the selective uptake, retention or elimination of toxins, drugs and metabolites. Organic anion transporters (OATs) are responsible for the recognition of metabolites and toxins in the nephron and their eventual urinary excretion. Inhibition of OATs is used therapeutically to improve drug efficacy and reduce nephrotoxicity. The founding member of the renal organic anion transporter family, OAT1 (also known as SLC22A6), uses the export of α-ketoglutarate (α-KG), a key intermediate in the Krebs cycle, to drive selective transport and is allosterically regulated by intracellular chloride. However, the mechanisms linking metabolite cycling, drug transport and intracellular chloride remain obscure. Here, we present cryogenic-electron microscopy structures of OAT1 bound to α-KG, the antiviral tenofovir and clinical inhibitor probenecid, used in the treatment of Gout. Complementary in vivo cellular assays explain the molecular basis for α-KG driven drug elimination and the allosteric regulation of organic anion transport in the kidney by chloride.

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