Sucrose- and H-dependent charge movements associated with the gating of sucrose transporter ZmSUT1.

ABSTRACT:

Background

In contrast to man the majority of higher plants use sucrose as mobile carbohydrate. Accordingly proton-driven sucrose transporters are crucial for cell-to-cell and long-distance distribution within the plant body. Generally very negative plant membrane potentials and the ability to accumulate sucrose quantities of more than 1 M document that plants must have evolved transporters with unique structural and functional features.

Methodology/principal findings

To unravel the functional properties of one specific high capacity plasma membrane sucrose transporter in detail, we expressed the sucrose/H(+) co-transporter from maize ZmSUT1 in Xenopus oocytes. Application of sucrose in an acidic pH environment elicited inward proton currents. Interestingly the sucrose-depen

SUBMITTER: Carpaneto A 

PROVIDER: S-EPMC2935479 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature