<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Gournas, Christos</style></author><author><style face="normal" font="default" size="100%">Papageorgiou, Ioannis</style></author><author><style face="normal" font="default" size="100%">Diallinas, George</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The nucleobase-ascorbate transporter (NAT) family: genomics, evolution, structure-function relationships and physiological role.</style></title><secondary-title><style face="normal" font="default" size="100%">Mol Biosyst</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Amino Acid Sequence</style></keyword><keyword><style  face="normal" font="default" size="100%">Animals</style></keyword><keyword><style  face="normal" font="default" size="100%">Ascorbic acid</style></keyword><keyword><style  face="normal" font="default" size="100%">Biological</style></keyword><keyword><style  face="normal" font="default" size="100%">Evolution</style></keyword><keyword><style  face="normal" font="default" size="100%">Genomics</style></keyword><keyword><style  face="normal" font="default" size="100%">Humans</style></keyword><keyword><style  face="normal" font="default" size="100%">Models</style></keyword><keyword><style  face="normal" font="default" size="100%">Molecular</style></keyword><keyword><style  face="normal" font="default" size="100%">Molecular Sequence Data</style></keyword><keyword><style  face="normal" font="default" size="100%">Nucleobase Transport Proteins</style></keyword><keyword><style  face="normal" font="default" size="100%">Sequence Alignment</style></keyword><keyword><style  face="normal" font="default" size="100%">Structure-Activity Relationship</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2008 May</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">4</style></volume><pages><style face="normal" font="default" size="100%">404-16</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">This review summarizes knowledge concerning a ubiquitous plasma transmembrane protein family that mediates nucleobase or ascorbate secondary active transport (NAT). We show that prototype bacterial and mostly fungal members have become unique model systems to unravel structure-function relationships and regulation of expression, using classical and reverse genetics, as well as biochemical approaches. We discuss the importance of NAT-mediated ascorbate transport in mammals and how changes in substrate specificity, from different nucleobases to ascorbate, might have evolved at the molecular level. Finally, we also discuss how modelling NAT-purine interactions might constitute a step towards the use of NAT proteins as specific gateways for targeting pathogenic microbes.</style></abstract></record></records></xml>