nhx-4 encodes two isoforms of a sodium/proton exchanger expressed in the plasma membrane of nearly all cells and cell types; in polarized epithelial cells, NHX-4::GFP appears specifically located in the basolateral membrane, like human SLC9A1 ('NHE1'; OMIM:107310); nhx-4 has no reported mutant or RNAi phenotype, but, given its ubiquitous expression, may represent a housekeeping exchanger generally required for cellular viability; transgenic NHX-4A, when expressed in cell culture, mediates Na[+]-dependent pH recovery after intracellular acidification, independently of extracellular Cl[-].
Predicted to enable potassium:proton antiporter activity and sodium:proton antiporter activity. Predicted to be involved in potassium ion transmembrane transport; regulation of intracellular pH; and sodium ion import across plasma membrane. Predicted to be located in plasma membrane. Expressed widely.
Map position created from combination of previous interpolated map position (based on known location of sequence) and allele information. Therefore this is not a genetic map position based on recombination frequencies or genetic experiments. This was done on advice of the CGC.
CGC_data_submission
nxh-2 nxh-3 nxh-4 nxh-5 nxh-6 nxh-7 nxh-8 nxh-9 published in cgc5421 actually refer to nhx genes