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2.A.53.2.6
Basolateral kidney cortical collecting duct and parietal cell chloride/sulfate/oxalate permease or channel, SLC26A7 [substrate preference: NO3- >> Cl- = Br- = I- > SO42- = Glucarate-] (minimal OH- and HCO3- transport; regulated by cytoplasmic pH) (Hwan et al., 2005).  May function as a channel (Ohana et al., 2008).  Thyroglobulin regulates the expression and localization of the iodide transporter solute carrier, SLC26A7, in thyrocytes (Kiriya et al. 2022).  It is also regulated by thyroid stimulating hormone in thyrocytes (Tanimura et al. 2021). SLC26 mainly mediates transmembrane transport of various anions, including chloride and other halide ions, bicarbonate, oxalate, and sulfate. Several severe hereditary human diseases are caused by SLC26 protein mutations. Li et al. 2025 reported cryo-EM structures of SLC26A7 in apo and iodide binding states. 

Accession Number:Q8TE54
Protein Name:Anion exchange transporter
Length:656
Molecular Weight:72213.00
Species: [9606]
Number of TMSs:8
Location1 / Topology2 / Orientation3: Recycling endosome membrane1 / Multi-pass membrane protein2
Substrate chloride, bromide, iodide, glucarate(2-), hydrogencarbonate, sulfate, oxalate(2-), nitrate, hydroxide

Cross database links:

RefSeq: NP_439897.1    NP_599028.1   
Entrez Gene ID: 115111   
Pfam: PF01740    PF00916   
OMIM: 608479  gene
KEGG: hsa:115111    hsa:115111   

Gene Ontology

GO:0016323 C:basolateral plasma membrane
GO:0016021 C:integral to membrane
GO:0055038 C:recycling endosome membrane
GO:0015380 F:anion exchanger activity
GO:0015106 F:bicarbonate transmembrane transporter activity
GO:0005254 F:chloride channel activity
GO:0019531 F:oxalate transmembrane transporter activity
GO:0015116 F:sulfate transmembrane transporter activity
GO:0015701 P:bicarbonate transport
GO:0006821 P:chloride transport
GO:0019532 P:oxalate transport
GO:0008272 P:sulfate transport
GO:0055085 P:transmembrane transport
GO:0005768 C:endosome
GO:0015301 F:anion:anion antiporter activity

References (14)

[1] “Molecular cloning of SLC26A7, a novel member of the SLC26 sulfate/anion transporter family, from high endothelial venules and kidney.”  Vincourt J.-B.et.al.   11829495
[2] “Functional characterization of three novel tissue-specific anion exchangers SLC26A7, -A8, and -A9.”  Lohi H.et.al.   11834742
[3] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334
[4] “Identification of a basolateral Cl-/HCO3- exchanger specific to gastric parietal cells.”  Petrovic S.et.al.   12736153
[5] “SLC26A6 and SLC26A7 anion exchangers have a distinct distribution in human kidney.”  Kujala M.et.al.   15956810
[6] “Chloride/bicarbonate exchanger SLC26A7 is localized in endosomes in medullary collecting duct cells and is targeted to the basolateral membrane in hypertonicity and potassium depletion.”  Xu J.et.al.   16524946
[7] “Expression of ion transport-associated proteins in human efferent and epididymal ducts.”  Kujala M.et.al.   17504921
[8] “Molecular cloning of SLC26A7, a novel member of the SLC26 sulfate/anion transporter family, from high endothelial venules and kidney.”  Vincourt J.-B.et.al.   11829495
[9] “Functional characterization of three novel tissue-specific anion exchangers SLC26A7, -A8, and -A9.”  Lohi H.et.al.   11834742
[10] “The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).”  The MGC Project Teamet.al.   15489334
[11] “Identification of a basolateral Cl-/HCO3- exchanger specific to gastric parietal cells.”  Petrovic S.et.al.   12736153
[12] “SLC26A6 and SLC26A7 anion exchangers have a distinct distribution in human kidney.”  Kujala M.et.al.   15956810
[13] “Chloride/bicarbonate exchanger SLC26A7 is localized in endosomes in medullary collecting duct cells and is targeted to the basolateral membrane in hypertonicity and potassium depletion.”  Xu J.et.al.   16524946
[14] “Expression of ion transport-associated proteins in human efferent and epididymal ducts.”  Kujala M.et.al.   17504921

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MTGAKRKKKS MLWSKMHTPQ CEDIIQWCRR RLPILDWAPH YNLKENLLPD TVSGIMLAVQ 
61:	QVTQGLAFAV LSSVHPVFGL YGSLFPAIIY AIFGMGHHVA TGTFALTSLI SANAVERIVP 
121:	QNMQNLTTQS NTSVLGLSDF EMQRIHVAAA VSFLGGVIQV AMFVLQLGSA TFVVTEPVIS 
181:	AMTTGAATHV VTSQVKYLLG MKMPYISGPL GFFYIYAYVF ENIKSVRLEA LLLSLLSIVV 
241:	LVLVKELNEQ FKRKIKVVLP VDLVLIIAAS FACYCTNMEN TYGLEVVGHI PQGIPSPRAP 
301:	PMNILSAVIT EAFGVALVGY VASLALAQGS AKKFKYSIDD NQEFLAHGLS NIVSSFFFCI 
361:	PSAAAMGRTA GLYSTGAKTQ VACLISCIFV LIVIYAIGPL LYWLPMCVLA SIIVVGLKGM 
421:	LIQFRDLKKY WNVDKIDWGI WVSTYVFTIC FAANVGLLFG VVCTIAIVIG RFPRAMTVSI 
481:	KNMKEMEFKV KTEMDSETLQ QVKIISINNP LVFLNAKKFY TDLMNMIQKE NACNQPLDDI 
541:	SKCEQNTLLN SLSNGNCNEE ASQSCPNEKC YLILDCSGFT FFDYSGVSML VEVYMDCKGR 
601:	SVDVLLAHCT ASLIKAMTYY GNLDSEKPIF FESVSAAISH IHSNKNLSKL SDHSEV