[en] An uncoupling protein (UCP) was identified in mitochondria from Candida parapsilosis (CpUCP), a non-fermentative parasitic yeast. CpUCP was immunodetected using polyclonal antibodies raised against plant UCP. Activity of CpUCP, investigated in mitochondria depleted of free fatty acids, was stimulated by linoleic acid (LA) and inhibited by GTP. Activity of CpUCP enhanced state 4 respiration by decreasing DeltaPsi and lowered the ADP/O ratio. Thus, it was able to divert energy from oxidative phosphorylation. The voltage dependence of electron flux indicated that LA had a pure protonophoretic effect. The discovery of CpUCP proves that UCP-like proteins occur in the four eukaryotic kingdoms: animals, plants, fungi and protists.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Jarmuszkiewicz, Wieslawa
Milani, G.
Fortes, F.
Schreiber, A. Z.
Sluse, Francis ; Université de Liège - ULiège > Département des sciences de la vie > Bioénergétique et physiologie cellulaire
Vercesi, A.
Language :
English
Title :
Identification and characterization of a protozoan uncoupling protein in Acanthamoeba castellanii.
