Resumen
Several transporters suspected to be involved in tellurite uptake in Escherichia coli were analyzed. Results showed that the PitA phosphate transporter was related to tellurite uptake. Escherichia coli ΔpitA was approximately four-fold more tolerant to tellurite, and cell viability remained almost unchanged during prolonged exposure to the toxicant as compared with wild type or ΔpitB cells. Notably, reduced thiols (toxicant targets) as well as superoxide dismutase, catalase, and fumarase C activities did not change when exposing the ΔpitA strain to tellurite, suggesting that tellurite-triggered oxidative damage is attenuated in the absence of PitA. After toxicant exposure, remaining extracellular tellurite was higher in E. coli ΔpitA than in control cells. Whereas inductively coupled plasma atomic emission spectrometric studies confirmed that E. coli ΔpitA accumulates ~50% less tellurite than the other strains under study, tellurite strongly inhibited 32Pi uptake suggesting that the PitA transporter is one of the main responsible for tellurite uptake in this bacterium.
| Idioma original | English |
|---|---|
| Páginas (desde-hasta) | 259-267 |
| Número de páginas | 9 |
| Publicación | MicrobiologyOpen |
| Volumen | 1 |
| N.º | 3 |
| DOI | |
| Estado | Published - sep 2012 |
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ASJC Scopus subject areas
- Microbiology
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Tellurite enters Escherichia coli mainly through the PitA phosphate transporter. / Elías, Alex O.; Abarca, María José; Montes, Rebecca A.; Chasteen, Thomas G.; Pérez-Donoso, José M.; Vásquez, Claudio C.
En: MicrobiologyOpen, Vol. 1, N.º 3, 09.2012, p. 259-267.Resultado de la investigación: Article
TY - JOUR
T1 - Tellurite enters Escherichia coli mainly through the PitA phosphate transporter
AU - Elías, Alex O.
AU - Abarca, María José
AU - Montes, Rebecca A.
AU - Chasteen, Thomas G.
AU - Pérez-Donoso, José M.
AU - Vásquez, Claudio C.
PY - 2012/9
Y1 - 2012/9
N2 - Several transporters suspected to be involved in tellurite uptake in Escherichia coli were analyzed. Results showed that the PitA phosphate transporter was related to tellurite uptake. Escherichia coli ΔpitA was approximately four-fold more tolerant to tellurite, and cell viability remained almost unchanged during prolonged exposure to the toxicant as compared with wild type or ΔpitB cells. Notably, reduced thiols (toxicant targets) as well as superoxide dismutase, catalase, and fumarase C activities did not change when exposing the ΔpitA strain to tellurite, suggesting that tellurite-triggered oxidative damage is attenuated in the absence of PitA. After toxicant exposure, remaining extracellular tellurite was higher in E. coli ΔpitA than in control cells. Whereas inductively coupled plasma atomic emission spectrometric studies confirmed that E. coli ΔpitA accumulates ~50% less tellurite than the other strains under study, tellurite strongly inhibited 32Pi uptake suggesting that the PitA transporter is one of the main responsible for tellurite uptake in this bacterium.
AB - Several transporters suspected to be involved in tellurite uptake in Escherichia coli were analyzed. Results showed that the PitA phosphate transporter was related to tellurite uptake. Escherichia coli ΔpitA was approximately four-fold more tolerant to tellurite, and cell viability remained almost unchanged during prolonged exposure to the toxicant as compared with wild type or ΔpitB cells. Notably, reduced thiols (toxicant targets) as well as superoxide dismutase, catalase, and fumarase C activities did not change when exposing the ΔpitA strain to tellurite, suggesting that tellurite-triggered oxidative damage is attenuated in the absence of PitA. After toxicant exposure, remaining extracellular tellurite was higher in E. coli ΔpitA than in control cells. Whereas inductively coupled plasma atomic emission spectrometric studies confirmed that E. coli ΔpitA accumulates ~50% less tellurite than the other strains under study, tellurite strongly inhibited 32Pi uptake suggesting that the PitA transporter is one of the main responsible for tellurite uptake in this bacterium.
KW - Escherichia coli
KW - Phosphate transport
KW - PitA
KW - Tellurite uptake
UR - http://www.scopus.com/inward/record.url?scp=84878020523&partnerID=8YFLogxK
U2 - 10.1002/mbo3.26
DO - 10.1002/mbo3.26
M3 - Article
C2 - 23189244
AN - SCOPUS:84878020523
VL - 1
SP - 259
EP - 267
JO - MicrobiologyOpen
JF - MicrobiologyOpen
SN - 2045-8827
IS - 3
ER -