Gene Information
Gene NameSIT1
OrganismHomo sapiens (Human)
Gene Length592
Protein NamesSodium- and chloride-dependent transporter XTRP3 (Sodium/imino-acid transporter 1) (Solute carrier family 6 member 20) (Transporter rB21A homolog)
Target NameNA
Target TypeNA
Gene Age168 ( ENSG00000137078 )
Evolutionary StageMammalia
AlphaFoldDBQ9NP91
Gene CardSLC6A20
Uniprot IDQ9NP91
PfamPF00209
In ASDno
Allosteric Predictionno (-1.195155679)
Ortholog in AnimalsAlpaca_ SIT1 ( ortholog_one2one )
Dog_ SIT1 ( ortholog_one2one )
GuineaPig_ SIT1 ( ortholog_one2one )
Macaque_ SIT1 ( ortholog_one2one )
Mouse_ Sit1 ( ortholog_one2one )
Pig_ SIT1 ( ortholog_one2one )
Rat_ Sit1 ( ortholog_one2one )
Rabbit_ SIT1 ( ortholog_one2one )
OhnologsNA
ParalogsNA
Tissueappendix, lymph.node, spleen, tonsil
Tissue SpecificityKidney and small intestine. Expressed in the S3 segment of the proximal tubule. Expressed in neurons (PubMed:33428810). {ECO:0000269|PubMed:19033659, ECO:0000269|PubMed:33428810, ECO:0000269|PubMed:9932288}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB NA 
DBSNP rs2271615  rs17279437 
Subcellular location [CC]Apical cell membrane {ECO:0000250|UniProtKB:Q8VDB9};
Multi-pass membrane protein {ECO:0000250|UniProtKB:Q8VDB9}. Note=Located in the apical brush border membrane of kidney proximal tubule cells and in the apical membrane of enterocytes lining the intestinal villi. {ECO:0000250|UniProtKB:Q8VDB9}.
Mouse PG classificationNA
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