Abstract
TheSaccharomyces cerevisiae genome contains three genes encoding alkali metal cation/H+ antiporters (Nha1p, Nhx1p, Kha1p) that differ in cell localization, substrate specificity and physiological function. Systematic genome sequencing of other yeast species revealed highly conserved homologous ORFs in all of them. We compared the yeast sequences both at DNA and protein levels. The subfamily of yeast endosomal/prevacuolar Nhx1 antiporters is closely related to mammalian plasma membrane NHE proteins and to both plasma membrane and vacuolar plant antiporters. The high sequence conservation within this subfamily of yeast antiporters suggests that Nhx1p is of great importance in cell physiology. Yeast Kha1 proteins probably belong to the same subfamily as bacterial antiporters, whereas Nha1 proteins form a distinct subfamily.
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Abbreviations
- aa:
-
amino acid
- ORF:
-
open reading frame
- tmd(s):
-
transmembrane domain(s)
- Cal :
-
Candida albicans
- Cgl :
-
Candida glabrata
- Ctr :
-
Candida tropicalis
- Dha :
-
Debaryomyces hansenii var.hansenii
- Kla :
-
Kluyveromyces lactis
- Pan :
-
Pichia (Hansenula) anomala
- Pso :
-
Pichia sorbitophila
- Sba :
-
Saccharomyces bayanus
- Sca :
-
Saccharomyces castellii
- Sce :
-
Saccharomyces cerevisiae
- Sku :
-
Saccharomyces kudriavzevii
- Smi :
-
Saccharomyces mikatae
- Spa :
-
Saccharomyces paradoxus
- Spo :
-
Schizosaccharomyces pombe
- Yli :
-
Yarrowia lipolytica
- Zro :
-
Zygosaccharomyces rouxii
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This work was supported by theMinistry of Education, Youth and Sports of the Czech Republic (grant MŠMT LC531), by theGrant Agency of the Czech Republic (grant GA ČR 204/03/H066) and byInstitutional research project of theInstitute of Physiology (AV 0Z 501 1922). A. Kotyk and O. Kinclová-Zimmermannová are gratefully acknowledged for critical reading of the manuscript.
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Přibylová, L., Papoušková, K., Zavřel, M. et al. Exploration of yeast alkali metal cation/H+ antiporters: Sequence and structure comparison. Folia Microbiol 51, 413–424 (2006). https://doi.org/10.1007/BF02931585
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DOI: https://doi.org/10.1007/BF02931585