Energy-linked Sulfate Uptake by Corn Mitochondria via the Phosphate Transporter 1
AUTOR(ES)
Abou-Khalil, Samir
RESUMO
Corn shoot mitochondria possess an energy-linked transport system for sulfate uptake as demonstrated by osmotic swelling and [35S]SO42− accumulation. Maximum uptake is secured in the presence of Mg2+ and oligomycin with sucrose for osmotic support. Neither phosphate nor dicarboxylate anions are required. When added simultaneously, millimolar concentrations of phosphate block [35S]SO42− uptake after the initial minute. Mersalyl, N-ethylmaleimide, and 2,4-dinitrophenol are strong inhibitors of sulfate uptake; n-butylmalonate is a weak inhibitor. These inhibitors act in the same fashion on phosphate uptake. It is concluded that sulfate uptake in the absence of phosphate is by the phosphate transporter.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542886Documentos Relacionados
- Energy-linked Adenosine Diphosphate Accumulation by Corn Mitochondria: II. Phosphate and Divalent Cation Requirement 1
- Energy-linked Adenosine Diphosphate Accumulation by Corn Mitochondria: I. General Characteristics and Effect of Inhibitors 1
- Energy-linked potassium uptake by mitochondria from wild-type and poky strains of Neurospora crassa.
- Energy-linked Functions of Submitochondrial Particles Prepared from Mung Bean Mitochondria 1
- Energy-linked Potassium Influx as Related to Cell Potential in Corn Roots 1