Title : Cyclophilin A is involved in functional expression of the Na(+)-Ca(2+) exchanger NCX1.

Pub. Date : 2010 Sep 7

PMID : 20681522






2 Functional Relationships(s)
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1 In this work, we show that knockdown of cell CypA using targeting siRNA (without any CsA treatment) results in a reduction in the level of NCX1 surface expression, a decrease in the level of Na(+)-dependent Ca(2+) uptake, and no change in the total amount of cell NCX1 protein in NCX1.5-transfected HEK 293 cells and nontransfected H9c2 cells that express NCX1.1 naturally. Cyclosporine peptidylprolyl isomerase A Homo sapiens
2 Overexpression of CypA or its R55A mutant, which exhibits a substantially reduced PPIase activity, alleviated the reduction of NCX1 surface expression caused by CsA treatment, suggesting that the PPIase domain was probably not mandatory for NCX1 functional expression. Cyclosporine peptidylprolyl isomerase A Homo sapiens