Why isoforms of the plant plasma membrane H(+)-ATPase?
The significance of different isoforms of the plant plasma membrane H(+)-ATPase is essentially unknown. At least some of the isoforms exhibit a tissue-specific and developmental pattern of expression. The three major isoforms of Arabidopsis thaliana plasma membrane H(+)-ATPase have been expressed in a functional form in yeast internal membranes. The isoforms differ significantly from each other in several kinetic parameters. Thus, the isoform diversity of plasma membrane H(+)-ATPase might provide the individual cell with enzymes specifically adapted to that cell.
Palmgren
M G
MG
Department of Plant Biology, Royal Veterinary and Agricultural University, Frederiksberg, Copenhagen, Denmark.
D002462:Cell Membrane / Q000201:enzymology*; D017343:Genes, Plant; D007527:Isoenzymes; D010944:Plants / Q000201:enzymology*; D006180:Proton-Translocating ATPases / Q000737:chemistry* / Q000235:genetics; D013329:Structure-Activity Relationship
D007527:Isoenzymes; D006180:Proton-Translocating ATPases