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The SLC4 family of bicarbonate transporters

Open access
Romero, Michael F., Chen, An-Ping, Parker, Mark D., Boron, Walter F.·2013·Molecular Aspects of Medicine

Abstract

The SLC4 family consists of ten genes (SLC4A1-5; SLC4A7-11). All encode integral membrane proteins with very similar hydropathy plots—consistent with 10 – 14 transmembrane segments. Nine SLC4 members encode proteins that transport HCO3− (or a related species, such as CO3=) across the plasma membrane. Functionally, eight of these proteins fall into two major groups: three Cl-HCO3 exchangers (AE1 – 3) and five Na+-coupled HCO3− transporters (NBCe1, NBCe2, NBCn1, NBCn2, NDCBE). Two of the Na+ - coupled transporters (NBCe1, NBCe2) are electrogenic; the other three Na+-coupled HCO3− transporters and all three AEs are electroneutral. In addition, two other SLC4 members (AE4, SLC4A9 and BTR1, SLC4A11) do not yet have a firmly established function. Most, though not all, SLC4 members are functionally inhibited by 4,4′-diisothiocyanatostilbene-2,2′-disulfonate (DIDS). SLC4 proteins play important roles many modes of acid-base homeostasis: the carriage of CO2 by erythrocytes, the transport of H+ or HCO3− by several epithelia, as well as the regulation of cell volume and intracellular pH.

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Metadata

Authors
Romero, M. F., Chen, A.-P., Parker, M. D., & Boron, W. F.
Venue
Molecular Aspects of Medicine
Publisher
Elsevier BV
Published
2013-04
Volume
34
Issue
2-3
Pages
159-182
ISSN
0098-2997 (ISSN-L)
OpenAlex
W1983930192
Cited by
326
References
2
FWCI
11.16
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The SLC4 family of bicarbonate transporters. https://app.cochat.ai/papers/10.1016/j.mam.2012.10.008
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Romero, M. F., Chen, A.-P., Parker, M. D., & Boron, W. F. (2013). The SLC4 family of bicarbonate transporters. Molecular Aspects of Medicine. https://doi.org/10.1016/j.mam.2012.10.008

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