title: L-aspartate transport in the photosynthetic bacterium Chromatium vinosum.
abstract: The photosynthetic purple sulfur bacterium Chromatium vinosum appears to contain two active transport systems for L-aspartate. The higher affinity system (S0.5 = 60 microM) appears to be an electrogenic aspartate/H+ symport and the lower affinity system (S0.5 = 220 microM) appears to involve an aspartate/Na+ symport. In addition to a possible role in providing the driving force for aspartate uptake, transmembrane Na+ gradients may also have allosteric effects on aspartate transport in C. vinosum.
mesh_terms: D001224:Aspartic Acid / Q000378:metabolism*; D001693:Biological Transport, Active; D002844:Chromatium / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008027:Light; D010788:Photosynthesis; D012964:Sodium / Q000502:physiology
chemical_list: D001224:Aspartic Acid; D012964:Sodium