Oxyanions | Transport systems | Bacterial species | Method used to define the transport system | Results observed | Refs. |
---|---|---|---|---|---|
Tellurite | PitA (low-affinity Pi transporter) | E.coli | pitA gene deletion | ΔpitA mutant: increased tolerance to Te | [66] |
 | ActP (acetate permeases ActP1, ActP2) | R.capsulatus | actP gene deletion | ΔactP mutant: increased resistance to Te | |
 | ActP2 | R.capsulatus, E.coli | Expression of ActP2 from R. capsulatus into E.coli | E.coli actP2::lacZ mutant: 4-times higher Te-uptake than w.t | [72] |
 | ActP | E.coli | actP gene deletion | #Active at short-times of exposure to Te | [63] |
 | PitA + PitB (low-affinity + putative Pi transporters) | E.coli | pitA + pitB gene deletion | #Active at long-times of exposure to Te | [63] |
 | PstA, PstD (high-affinity Pi transporter) | L.lactis | §Insertions into pstA + pstD genes | Strong increase in resistance to Te | [71] |
Selenite | Pi transporters | E.coli | Addition of Pi to growth medium | Large decrease of Se uptake in Pi amended cultures | [92] |
 | * Undefined sulphate permease | E.coli | Kinetic analysis of sulphate, selenate and Se uptake | Se and selenate compete for a common sulphate carrier | [79] |
 | PitA (low-affinity Pi transporter) | E.coli | pitA gene deletion | ΔpitA mutant: large decrease of Se-reduction rate | [92] |
 | PstA (high-affinity Pi transporter) | E.coli | pstA gene deletion | ΔpstA mutant: decrease of Se-reduction rate | [92] |
 | SmoK protein (ABC transporter like) | R.sphaeroides | smoK gene deletion | ΔsmoK mutant: tenfold increase of MIC for Se | [46] |
 | Pi transporters | C.reinhardtii | Addition of Pi to growth medium | Decrease of Se- uptake in Pi amended cultures | [94] |
 | Mono-carboxylates transporters | C.reinhardtii | Addition of lactate to growth medium | Increase of Se-uptake in lactate amended cultures | [94] |