A cloned prokaryotic Cd2+ P-type ATPase increases yeast sensitivity to Cd2+.
Biochem Biophys Res Commun
; 324(3): 1034-40, 2004 Nov 19.
Article
en En
| MEDLINE
| ID: mdl-15485658
ABSTRACT
CadA, the P1-type ATPase involved in Listeria monocytogenes resistance to Cd(2+), was expressed in Saccharomyces cerevisiae and did just the opposite to what was expected, as it strikingly decreased the Cd(2+) tolerance of these cells. Yeast cells expressing the non-functional mutant Asp(398)Ala could grow on selective medium containing up to 100 microM Cd(2+), whereas those expressing the functional protein could not grow in the presence of 1 microM Cd(2+). The CadA-GFP fusion protein was localized in the endoplasmic reticulum membrane, suggesting that yeast hyper-sensitivity was due to Cd(2+) accumulation in the reticulum lumen. CadA is also known to transport Zn(2+), but Zn(2+) did not protect the cells against Cd(2+) poisoning. In the presence of 10 microM Cd(2+), transformed yeasts survived by rapid loss of their expression vector.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Adenosina Trifosfatasas
/
Listeria monocytogenes
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2004
Tipo del documento:
Article
País de afiliación:
Francia