General Information and Variability Data of DT
Gene Name SLCO4C1
Protein Name Organic anion transporting polypeptide 4C1
Synonyms OATP-H; OATP-M1; OATP4C1; OATPX; Organic anion transporter M1; PRO2176; SLC21A20; SLCO4C1; Solute carrier family 21 member 20
Gene ID
UniProt ID
DT Family Organo Anion Transporter (OAT) Family ;
Tissue Specificity Predominantly expressed in kidney but also weakly expressed in both fetal liver and kidney.
Function This organic anion transporter mediates the transport of pharmacological substances such as digoxin, ouabain, thyroxine, methotrexate and cAMP. May participate in the regulation of membrane transport of ouabain. Involved in the uptake of the dipeptidyl peptidase-4 inhibitor sitagliptin and hence may play a role in its transport into and out of renal proximal tubule cells. May be involved in the first step of the transport pathway of digoxin and various compounds into the urine in the kidney. May be involved in sperm maturation by enabling directed movement of organic anions and compounds within or between cells. This ion-transporting process is important to maintain the strict epididymal homeostasis necessary for sperm maturation. May have a role in secretory functions since seminal vesicle epithelial cells are assumed to secrete proteins involved in decapacitation by modifying surface proteins to facilitate the acquisition of the ability to fertilize the egg.
Disease(s) Hypothyroidism [ICD-11: 5A00.2]
Type 2 diabetes [ICD-11: 5A11]
Genetic Polymorphisms & Epigenetic Regulations of DT
Species-, Tissue- and Disease-specific Protein Abundances of DT
Exogenous Factor Altering DT Activity
Approved Drug(s) Transported by This DT Digoxin Drug Info Arrhythmias [ICD-11: BC60-BC9Z] Approved [1]
Estrone sulfate Drug Info Menopausal symptoms [ICD-11: MF32] Approved [2]
Liothyronine Drug Info Hypothyroidism [ICD-11: 5A00.2] Approved [1]
Ouabain Drug Info Heart failure [ICD-11: BD1Z] Approved [1]
Saxagliptin Drug Info Type 2 diabetes [ICD-11: 5A11] Approved [3]
Endogenous Substrate(s) Cardiac glycosides; Ouabain; Thyroxine; Triiodothyronine
Endogenous Metabolites (EMs) Handled by This DT Indoxyl sulfate EM Info Identified using hSLCO4C1-expressing rat [4]
Drug-DT Affinity Assessed by Cell Line
Drug(s) with Drug-DT Affinity Data Digoxin Drug Info Madin-Darby canine kidney (MDCK) cells-OATP4C1 Km = 7.8 microM [1]
Liothyronine Drug Info Madin-Darby canine kidney (MDCK) cells-OATP4C1 Km = 5.9 microM [1]
Ouabain Drug Info Madin-Darby canine kidney (MDCK) cells-OATP4C1 Km = 0.38 microM [1]
1 Isolation and characterization of a digoxin transporter and its rat homologue expressed in the kidney. Proc Natl Acad Sci U S A. 2004 Mar 9;101(10):3569-74.
2 Transport of estrone 3-sulfate mediated by organic anion transporter OATP4C1: estrone 3-sulfate binds to the different recognition site for digoxin in OATP4C1. Drug Metab Pharmacokinet. 2010;25(3):314-7.
3 Comparative clinical pharmacokinetics of dipeptidyl peptidase-4 inhibitors. Clin Pharmacokinet. 2012 Aug 1;51(8):501-14.
4 SLCO4C1 transporter eliminates uremic toxins and attenuates hypertension and renal inflammation. J Am Soc Nephrol. 2009 Dec;20(12):2546-55.

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