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2.A.40.6.2
Ca2+/Mg2+-dependent L-ascorbate:Na+ symporter, SVCT2; Na+:ascorbate = 2:1; binding order: Na+, ascorbate, Na+ (Na+ increases the affinity for ascorbate); Ca2+/Mg2+ are required for function) (Godoy et al., 2007; Bürzle et al. 2013). SVCT2-GLUT1-mediated ascorbic acid transport pathway in rat dental pulp has been studied, and its effects during wound healing have been described (Ohkura et al. 2023). SVCT2 and ascorbate in modulate the microglial response to mTBI and suggests a potential role for both in response to neuroinflammatory challenges (Marino et al. 2024).  MmSLC23A2 functions to inhibit apoptosis via ROS scavenging in hard clam (Mercenaria mercenaria) under acute hypo-salinity stress (Zhou et al. 2025).

Accession Number:Q9UGH3
Protein Name:SVCT2 aka SLC23A2
Length:650
Molecular Weight:70337.00
Species:Homo sapiens (Human) [9606]
Number of TMSs:12
Location1 / Topology2 / Orientation3: Membrane1 / Multi-pass membrane protein2
Substrate calcium(2+), magnesium(2+), sodium(1+), L-ascorbic acid

Cross database links:

RefSeq: NP_005107.4    NP_976072.1   
Entrez Gene ID: 9962   
Pfam: PF00860   
OMIM: 603791  gene
KEGG: hsa:9962    hsa:9962   

Gene Ontology

GO:0016324 C:apical plasma membrane
GO:0016323 C:basolateral plasma membrane
GO:0005887 C:integral to plasma membrane
GO:0005624 C:membrane fraction
GO:0015205 F:nucleobase transmembrane transporter activity
GO:0070890 F:sodium-dependent L-ascorbate transmembrane ...
GO:0008523 F:sodium-dependent multivitamin transmembrane...
GO:0019852 P:L-ascorbic acid metabolic process
GO:0015993 P:molecular hydrogen transport
GO:0015851 P:nucleobase transport
GO:0006139 P:nucleobase, nucleoside, nucleotide and nucl...
GO:0006814 P:sodium ion transport
GO:0070904 P:transepithelial L-ascorbic acid transport
GO:0009925 C:basal plasma membrane
GO:0005737 C:cytoplasm
GO:0008520 F:L-ascorbate:sodium symporter activity
GO:0070890 F:sodium-dependent L-ascorbate transmembrane transporter activity
GO:0008523 F:sodium-dependent multivitamin transmembrane transporter activity
GO:0006139 P:nucleobase-containing compound metabolic process
GO:0006979 P:response to oxidative stress

References (20)

[1] “Molecular characterization of two novel transporters from human and mouse kidney and from LLC-PK1 cells reveals a novel conserved family that is homologous to bacterial and Aspergillus nucleobase transporters.”  Faaland C.A.et.al.   9804989
[2] “Human placental sodium-dependent vitamin C transporter (SVCT2): molecular cloning and transport function.”  Rajan D.P.et.al.   10471399
[3] “Cloning and functional characterization of the human sodium-dependent vitamin C transporters hSVCT1 and hSVCT2.”  Daruwala R.C.et.al.   10556521
[4] “A human nucleobase transporter-like cDNA (SLC23A1): member of a transporter family conserved from bacteria to mammals.”  Hogue D.L.et.al.   10395795
[5] “Vitamin C transport systems of mammalian cells.”  Liang W.J.et.al.   11396616
[6] “Prediction of the coding sequences of unidentified human genes. VI. The coding sequences of 80 new genes (KIAA0201-KIAA0280) deduced by analysis of cDNA clones from cell line KG-1 and brain.”  Nagase T.et.al.   9039502
[7] “Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones.”  Nakajima D.et.al.   12168954
[8] “The DNA sequence and comparative analysis of human chromosome 20.”  Deloukas P.et.al.   11780052
[9] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334
[10] “Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions.”  Mayya V.et.al.   19690332
[11] “Molecular characterization of two novel transporters from human and mouse kidney and from LLC-PK1 cells reveals a novel conserved family that is homologous to bacterial and Aspergillus nucleobase transporters.”  Faaland C.A.et.al.   9804989
[12] “Human placental sodium-dependent vitamin C transporter (SVCT2): molecular cloning and transport function.”  Rajan D.P.et.al.   10471399
[13] “Cloning and functional characterization of the human sodium-dependent vitamin C transporters hSVCT1 and hSVCT2.”  Daruwala R.C.et.al.   10556521
[14] “A human nucleobase transporter-like cDNA (SLC23A1): member of a transporter family conserved from bacteria to mammals.”  Hogue D.L.et.al.   10395795
[15] “Vitamin C transport systems of mammalian cells.”  Liang W.J.et.al.   11396616
[16] “Prediction of the coding sequences of unidentified human genes. VI. The coding sequences of 80 new genes (KIAA0201-KIAA0280) deduced by analysis of cDNA clones from cell line KG-1 and brain.”  Nagase T.et.al.   9039502
[17] “Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones.”  Nakajima D.et.al.   12168954
[18] “The DNA sequence and comparative analysis of human chromosome 20.”  Deloukas P.et.al.   11780052
[19] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334
[20] “Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions.”  Mayya V.et.al.   19690332

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MMGIGKNTTS KSMEAGSSTE GKYEDEAKHP AFFTLPVVIN GGATSSGEQD NEDTELMAIY 
61:	TTENGIAEKS SLAETLDSTG SLDPQRSDMI YTIEDVPPWY LCIFLGLQHY LTCFSGTIAV 
121:	PFLLADAMCV GYDQWATSQL IGTIFFCVGI TTLLQTTFGC RLPLFQASAF AFLAPARAIL 
181:	SLDKWKCNTT DVSVANGTAE LLHTEHIWYP RIREIQGAII MSSLIEVVIG LLGLPGALLK 
241:	YIGPLTITPT VALIGLSGFQ AAGERAGKHW GIAMLTIFLV LLFSQYARNV KFPLPIYKSK 
301:	KGWTAYKLQL FKMFPIILAI LVSWLLCFIF TVTDVFPPDS TKYGFYARTD ARQGVLLVAP 
361:	WFKVPYPFQW GLPTVSAAGV IGMLSAVVAS IIESIGDYYA CARLSCAPPP PIHAINRGIF 
421:	VEGLSCVLDG IFGTGNGSTS SSPNIGVLGI TKVGSRRVIQ CGAALMLALG MIGKFSALFA 
481:	SLPDPVLGAL FCTLFGMITA VGLSNLQFID LNSSRNLFVL GFSIFFGLVL PSYLRQNPLV 
541:	TGITGIDQVL NVLLTTAMFV GGCVAFILDN TIPGTPEERG IRKWKKGVGK GNKSLDGMES 
601:	YNLPFGMNII KKYRCFSYLP ISPTFVGYTW KGLRKSDNSR SSDEDSQATG