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Débora E Rinaldi, Gerardo R Corradi, Lucía Martínez Cuesta, Hugo P Adamo, Felicitas de Tezanos Pinto
P-type ion pumps are membrane transporters that have been classified into five subfamilies termed P1-P5. The ion transported by the P5-ATPases is not known. Five genes named ATP13A1-ATP13A5 that belong to the P5-ATPase group are present in humans. Loss-of-function mutations in the ATP13A2 gene (PARK9, OMIM 610513) underlay a form of Parkinson's disease (PD) known as the Kufor-Rakeb syndrome (KRS), which belongs to the group of syndromes of neurodegeneration with brain iron accumulation (NBIA). Here we report that the cytotoxicity induced by iron exposure was two-fold reduced in CHO cells stably expressing the ATP13A2 recombinant protein (ATP13A2)...
August 2015: Biochimica et Biophysica Acta
Yifat Cohen, Márton Megyeri, Oscar C W Chen, Giuseppe Condomitti, Isabelle Riezman, Ursula Loizides-Mangold, Alaa Abdul-Sada, Nitzan Rimon, Howard Riezman, Frances M Platt, Anthony H Futerman, Maya Schuldiner
The endoplasmic reticulum (ER) is a large, multifunctional and essential organelle. Despite intense research, the function of more than a third of ER proteins remains unknown even in the well-studied model organism Saccharomyces cerevisiae. One such protein is Spf1, which is a highly conserved, ER localized, putative P-type ATPase. Deletion of SPF1 causes a wide variety of phenotypes including severe ER stress suggesting that this protein is essential for the normal function of the ER. The closest homologue of Spf1 is the vacuolar P-type ATPase Ypk9 that influences Mn(2+) homeostasis...
2013: PloS One
Lisa S Weingarten, Hardi Dave, Hongyan Li, Dorota A Crawford
P(5) ATPases (ATP13A1 through ATP13A5) are found in all eukaryotes. They are currently poorly characterized and have unknown substrate specificity. Recent evidence has linked two P(5) ATPases to diseases of the nervous system, suggesting possible importance of these proteins within the nervous system. In this study we determined the relative expression of mouse P5 ATPases in development using quantitative real time PCR. We have shown that ATP13A1 and ATP13A2 were both expressed similarly during development, with the highest expression levels at the peak of neurogenesis...
March 2012: Cellular & Molecular Biology Letters
Patrick J Schultheis, Tamara T Hagen, Kate K O'Toole, Akiko Tachibana, Charles R Burke, Diana L McGill, Gbolahan W Okunade, Gary E Shull
In mammals, the most poorly understood P-type ATPases are those of the P(5) subfamily. To begin characterization of the mammalian P(5)-ATPases, BLAST searches of DNA sequence databases were performed. Five genes were identified in the mouse, human, dog, and rat genomes, and the coding sequences of the mouse genes, termed Atp13a1-Atp13a5, were determined. The intron/exon organization of Atp13a1 differs entirely from those of Atp13a2-5, which are closely related. Amino acid sequence comparisons between the five mouse and two yeast P(5)-ATPases suggest that Atp13a1 is orthologous to the yeast Cod1 gene and that Atp13a2-5 are orthologous to yeast Yor291w...
October 22, 2004: Biochemical and Biophysical Research Communications
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