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TitleCryo-EM structures of human organic anion transporting polypeptide OATP1B1.
Journal, issue, pagesCell Res, Vol. 33, Issue 12, Page 940-951, Year 2023
Publish dateSep 6, 2023
AuthorsZiyang Shan / Xuemei Yang / Huihui Liu / Yafei Yuan / Yuan Xiao / Jing Nan / Wei Zhang / Wenqi Song / Jufang Wang / Feiwen Wei / Yanqing Zhang /
PubMed AbstractMembers of the solute carrier organic anion transporting polypeptide (OATPs) family function as transporters for a large variety of amphipathic organic anions including endogenous metabolites and ...Members of the solute carrier organic anion transporting polypeptide (OATPs) family function as transporters for a large variety of amphipathic organic anions including endogenous metabolites and clinical drugs, such as bile salts, steroids, thyroid hormones, statins, antibiotics, antivirals, and anticancer drugs. OATP1B1 plays a vital role in transporting such substances into the liver for hepatic clearance. FDA and EMA recommend conducting in vitro testing of drug-drug interactions (DDIs) involving OATP1B1. However, the structure and working mechanism of OATPs still remains elusive. In this study, we determined cryo-EM structures of human OATP1B1 bound with representative endogenous metabolites (bilirubin and estrone-3-sulfate), a clinical drug (simeprevir), and a fluorescent indicator (2',7'-dichlorofluorescein), in both outward- and inward-open states. These structures reveal major and minor substrate binding pockets and conformational changes during transport. In combination with mutagenesis studies and molecular dynamics simulations, our work comprehensively elucidates the transport mechanism of OATP1B1 and provides the structural basis for DDI predictions involving OATP1B1, which will greatly promote our understanding of OATPs.
External linksCell Res / PubMed:37674011 / PubMed Central
MethodsEM (single particle)
Resolution2.92 - 3.73 Å
Structure data

EMDB-34909, PDB-8hnb:
Cryo-EM structure of human OATP1B1 in apo state
Method: EM (single particle) / Resolution: 3.53 Å

EMDB-34910, PDB-8hnc:
Cryo-EM structure of human OATP1B1 in complex with bilirubin
Method: EM (single particle) / Resolution: 3.73 Å

EMDB-34911, PDB-8hnd:
Cryo-EM structure of human OATP1B1 in complex with estrone-3-sulfate
Method: EM (single particle) / Resolution: 3.19 Å

EMDB-34913, PDB-8hnh:
Cryo-EM structure of human OATP1B1 in complex with simeprevir
Method: EM (single particle) / Resolution: 3.73 Å

EMDB-36922, PDB-8k6l:
Cryo-EM structure of human OATP1B1 in complex with DCF
Method: EM (single particle) / Resolution: 2.92 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

ChemComp-BLR:
3-[5-[(Z)-(4-ethenyl-3-methyl-5-oxidanylidene-pyrrol-2-ylidene)methyl]-2-[[5-[(Z)-(3-ethenyl-4-methyl-5-oxidanylidene-pyrrol-2-ylidene)methyl]-3-(3-hydroxy-3-oxopropyl)-4-methyl-1H-pyrrol-2-yl]methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid / Bilirubin

ChemComp-FY5:
estrone 3-sulfate / medication, hormone*YM / Estrone sulfate

ChemComp-30B:
(2R,3aR,10Z,11aS,12aR,14aR)-N-(cyclopropylsulfonyl)-2-({7-methoxy-8-methyl-2-[4-(1-methylethyl)-1,3-thiazol-2-yl]quinolin-4-yl}oxy)-5-methyl-4,14-dioxo-2,3,3a,4,5,6,7,8,9,11a,12,13,14,14a-tetradecahydrocyclopenta[c]cyclopropa[g][1,6]diazacyclotetradecine-12a(1H)-carboxamide / medication*YM / Simeprevir

ChemComp-IOQ:
2',7'-bis(chloranyl)-3',6'-bis(oxidanyl)spiro[2-benzofuran-3,9'-xanthene]-1-one

Source
  • homo sapiens (human)
KeywordsMEMBRANE PROTEIN / transporter / OATP1B1 / organic anion transporting peptide

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