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XB-ART-15989
J Clin Invest October 1, 1997; 100 (7): 1693-707.
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Familial distal renal tubular acidosis is associated with mutations in the red cell anion exchanger (Band 3, AE1) gene.

Bruce LJ , Cope DL , Jones GK , Schofield AE , Burley M , Povey S , Unwin RJ , Wrong O , Tanner MJ .


Abstract
All affected patients in four families with autosomal dominant familial renal tubular acidosis (dRTA) were heterozygous for mutations in their red cell HCO3-/Cl- exchanger, band 3 (AE1, SLC4A1) genes, and these mutations were not found in any of the nine normal family members studied. The mutation Arg589--> His was present in two families, while Arg589--> Cys and Ser613--> Phe changes were found in the other families. Linkage studies confirmed the co-segregation of the disease with a genetic marker close to AE1. The affected individuals with the Arg589 mutations had reduced red cell sulfate transport and altered glycosylation of the red cell band 3 N-glycan chain. The red cells of individuals with the Ser613--> Phe mutation had markedly increased red cell sulfate transport but almost normal red cell iodide transport. The erythroid and kidney isoforms of the mutant band 3 proteins were expressed in Xenopus oocytes and all showed significant chloride transport activity. We conclude that dominantly inherited dRTA is associated with mutations in band 3; but both the disease and its autosomal dominant inheritance are not related simply to the anion transport activity of the mutant proteins.

PubMed ID: 9312167
PMC ID: PMC508352
Article link: J Clin Invest
Grant support: [+]

Species referenced: Xenopus
Genes referenced: slc4a1

References [+] :
, Unravelling of the molecular mechanisms of kidney stones. Report of a Meeting of Physicians and Scientists. 1997, Pubmed