SLC22A13
Chr 3solute carrier family 22 member 13
Also known as: OAT10, OCTL1, OCTL3, ORCTL-3, ORCTL3
This transmembrane anion antiporter mediates transport of urate, orotate, and nicotinate across cell membranes, particularly in renal proximal tubule cells where it facilitates urate reabsorption. Mutations cause autosomal recessive hypouricemia, which can present with exercise-induced acute kidney injury and nephrolithiasis. The gene is not highly constrained against loss-of-function variants, consistent with the recessive inheritance pattern of associated disease.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Mild missense constraint
This gene has evidence for multiple mechanisms of pathogenicity (dominant-negative and gain-of-function). Both the Badonyi & Marsh prediction and the broader genomic evidence point to dominant-negative as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.
Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.
Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.
ClinVar Variant Classifications
105 submitted variants in ClinVar
Classification Summary
Curated Variants Distribution
Classified variants from ClinVar · 5 ACMG categories
| Classification | LoF | Missense + Inframe | Non-coding | Synonymous | Total |
|---|---|---|---|---|---|
Pathogenic | 0 | 0 | 10 | 0 | 10 |
Likely Pathogenic | 0 | 0 | 1 | 0 | 1 |
VUS | 0 | 72 | 7 | 0 | 79 |
Likely Benign | 0 | 9 | 1 | 2 | 12 |
Benign | 0 | 1 | 0 | 0 | 1 |
| Total | 0 | 82 | 19 | 2 | 103 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
SLC22A13 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
3D Protein StructureAlphaFold
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
External Resources
Links to major genomics databases and tools