Protein Domain : IPR018409

Type:  Family Name:  Na+/H+ exchanger, isoform 8
Description:  Sodium proton exchangers (NHEs) constitute a large family of integral membrane protein transporters that are responsible for the counter-transport of protons and sodium ions across lipid bilayers [, ]. These proteins are found in organisms across all domains of life. In archaea, bacteria, yeast and plants, these exchangers provide increased salt tolerance by removing sodium in exchanger for extracellular protons. In mammals they participate in the regulation of cell pH, volume, and intracellular sodium concentration, as well as for the reabsorption of NaCl across renal, intestinal, and other epithelia [, , , ]. Human NHE is also involved in heart disease, cell growth and in cell differentiation []. The removal of intracellular protons in exchange for extracellular sodium effectively eliminates excess acid from actively metabolising cells. In mammalian cells, NHE activity is found in both the plasma membrane and inner mitochondrial membrane. To date, nine mammalian isoforms have been identified (designated NHE1-NHE9) [, ]. These exchangers are highly-regulated (glyco)phosphoproteins, which, based on their primary structure, appear to contain 10-12 membrane-spanning regions (M) at the N terminus and a large cytoplasmic region at the C terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family. There is some evidence that the exchangers may exist in the cell membrane as homodimers, but little is currently known about the mechanism of their antiport [].This entry represents Na+/H+ exchanger protein isoform 8 []. Short Name:  Na/H_exchanger_8

0 Child Features

0 Contains

1 Cross References

Identifier
PTHR10110:SF88

0 Found In

4 GO Annotations

GO Term Gene Name
GO:0015385 IPR018409
GO:0006814 IPR018409
GO:0006885 IPR018409
GO:0016021 IPR018409

4 Ontology Annotations

GO Term Gene Name
GO:0015385 IPR018409
GO:0006814 IPR018409
GO:0006885 IPR018409
GO:0016021 IPR018409

1 Parent Features

DB identifier Type Name
IPR004709 Family Na+/H+ exchanger

0 Proteins

11 Publications

First Author Title Year Journal Volume Pages PubMed ID
            9537504
            9278382
            9507001
            12027219
            12502567
            16734752
            17071327
            16513813
            11187762
            17218973
            15522866