Data from: Detailed characterization of the UMAMITs proteins provides insight into their evolution, amino acid transport properties, and role in the plant

Amino acid transporters play a critical role in distributing amino acids
within the cell compartments and between the plant organs. Despite this
importance, relatively few amino acid transporter genes have been
characterized and their role elucidated with certainty. Two main families
of proteins encode amino acid transporters in plants: the Amino
Acid-Polyamine-Organocation superfamily, containing mostly importers, and
the Usually Multiple Acids Move In and out Transporter family, apparently
encoding exporters, totaling 63 and 44 genes in Arabidopsis, respectively.
Knowledge on UMAMITs is scarce, based on six Arabidopsis genes and a
handful of genes from other species. To get insight into the role of the
members of this family and provide data to be used for future
characterization, we studied the evolution of the UMAMITs in plants, and
determined the functional properties, the structure, and the localization
of the 47 Arabidopsis UMAMITs. Our analysis showed that the AtUMAMITs are
essentially localized at the tonoplast or the plasma membrane, and that
most of them are able to export amino acids from the cytosol, confirming a
role in intra- and inter-cellular amino acid transport. As an example,
this set of data was used to hypothesize the role of a few AtUMAMITs in
the plant and the cell.