Cloning and expression of two genes coding for sodium pumps in the salt-tolerant yeast Debaryomyces hansenii.
Two genes encoding Na(+)-ATPases from Debaryomyces hansenii were cloned and sequenced. The genes, designated ENA1 from D. hansenii (DhENA1) and DhENA2, exhibited high homology with the corresponding genes from Schwanniomyces occidentalis. DhENA1 was expressed in the presence of high Na(+) concentrations, while the expression of DhENA2 also required high pH. A mutant of Saccharomyces cerevisiae lacking the Na(+) efflux systems and sensitive to Na(+), when transformed with DhENA1 or DhENA2, recovered Na(+) tolerance and also the ability to extrude Na(+).
Almagro
A
A
Departamento de Microbiología, Escuela Técnica Superior de Ingenieros Agrónomos, E-14071 Córdoba, Spain.
Prista
C
C
Benito
B
B
Loureiro-Dias
M C
MC
Ramos
J
J
D000251:Adenosine Triphosphatases / Q000235:genetics / Q000378:metabolism*; D027682:Cation Transport Proteins; D003001:Cloning, Molecular; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D029701:Saccharomyces cerevisiae Proteins; D004718:Saccharomycetales / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D012965:Sodium Chloride / Q000378:metabolism*; D000254:Sodium-Potassium-Exchanging ATPase / Q000235:genetics / Q000378:metabolism*
D027682:Cation Transport Proteins; C086375:ENA1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D012965:Sodium Chloride; D000251:Adenosine Triphosphatases; D000254:Sodium-Potassium-Exchanging ATPase