Reference: Uccelletti D, et al. (1999) The KlPMR1 gene of Kluyveromyces lactis encodes for a P-type Ca(2+)-ATPase. Yeast 15(7):593-9

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Abstract


A novel P-type Ca(2+)-ATPase gene has been cloned and sequenced in the yeast Kluyveromyces lactis. The gene has been named KlPMR1 and is localized on chromosome I. The putative gene product contains 936 residues and has a calculated molecular weight of 102,437 Da. Analysis of deduced amino acid sequence (KlPmr1p) indicated that the encoded protein retains all the highly conserved domains characterizing the P-type ATPases. KlPmr1p shares 71% amino acid identity with Pmr1p of S. cerevisiae, 62% with HpPmr1p of Hansenula polymorpha, 56% with Y1Pmr1p of Yarrowia lipolytica and 52% with the Ca(2+)-ATPase encoded for by the SPCA1 gene of Rattus norvegicus; these similarities place KlPmr1p in the SPCA group (secretory pathway Ca(2+)-ATPase) of the P-type ATPases. The K. lactis strain harbouring the Klpmr1 disrupted gene is not able to grow in presence of low calcium concentrations and shows hypersensitivity to high concentrations of EGTA in the medium. These defects are relieved by PMR1 of S. cerevisiae on a centromeric plasmid, demonstrating that KlPMR1 encodes for a functional Pmr1p homologue.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Uccelletti D, Farina F, Palleschi C
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