8jf1

Structural highlights

Function

S23A1_HUMAN Sodium:ascorbate cotransporter. Mediates electrogenic uptake of vitamin C, with a stoichiometry of 2 Na(+) for each ascorbate (PubMed:10556483, PubMed:10556521, PubMed:10631088, PubMed:36749388). Has retained some ancestral activity toward nucleobases such as urate, an oxidized purine. Low-affinity high-capacity sodium:urate cotransporter, may regulate serum urate levels by serving as a renal urate re-absorber (PubMed:36749388).^{[1] [2] [3] [4]} Inactive transporter.^[5]

References

1. ↑ Wang H, Dutta B, Huang W, Devoe LD, Leibach FH, Ganapathy V, Prasad PD. Human Na(+)-dependent vitamin C transporter 1 (hSVCT1): primary structure, functional characteristics and evidence for a non-functional splice variant. Biochim Biophys Acta. 1999 Nov 9;1461(1):1-9. PMID:10556483 doi:10.1016/s0005-2736(99)00182-0
2. ↑ Daruwala R, Song J, Koh WS, Rumsey SC, Levine M. Cloning and functional characterization of the human sodium-dependent vitamin C transporters hSVCT1 and hSVCT2. FEBS Lett. 1999 Nov 5;460(3):480-4. PMID:10556521 doi:10.1016/s0014-5793(99)01393-9
3. ↑ Wang Y, Mackenzie B, Tsukaguchi H, Weremowicz S, Morton CC, Hediger MA. Human vitamin C (L-ascorbic acid) transporter SVCT1. Biochem Biophys Res Commun. 2000 Jan 19;267(2):488-94. PMID:10631088 doi:10.1006/bbrc.1999.1929
4. ↑ Toyoda Y, Miyata H, Uchida N, Morimoto K, Shigesawa R, Kassai H, Nakao K, Tomioka NH, Matsuo H, Ichida K, Hosoyamada M, Aiba A, Suzuki H, Takada T. Vitamin C transporter SVCT1 serves a physiological role as a urate importer: functional analyses and in vivo investigations. Pflugers Arch. 2023 Apr;475(4):489-504. PMID:36749388 doi:10.1007/s00424-023-02792-1
5. ↑ Wang H, Dutta B, Huang W, Devoe LD, Leibach FH, Ganapathy V, Prasad PD. Human Na(+)-dependent vitamin C transporter 1 (hSVCT1): primary structure, functional characteristics and evidence for a non-functional splice variant. Biochim Biophys Acta. 1999 Nov 9;1461(1):1-9. PMID:10556483 doi:10.1016/s0005-2736(99)00182-0