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Type: Artigo de periódico
Title: Functional reconstitution of Arabidopsis thaliana plant uncoupling mitochondrial protein (AtPUMP1) expressed in Escherichia coli
Author: Borecky, J
Maia, IG
Costa, ADT
Jezek, P
Chaimovich, H
de Andrade, PBM
Vercesi, AE
Arruda, P
Abstract: The Arabidopsis thaliana uncoupling protein (UCP) gene was expressed in Escherichia coli and isolated protein reconstituted into liposomes. Linoleic acid-induced H+ fluxes were sensitive to purine nucleotide inhibition with an apparent K-i (in mM) of 0.8 (GDP), 0.85 (ATP), 0.98 (GTP), and 1.41 (ADP); the inhibition was pH-dependent. Kinetics of AtPUMP1-mediated H+ fluxes were determined for lauric, myristic, palmitic, oleic, linoleic, and linolenic acids. Properties of recombinant AtPUMP1 indicate that it represents a plant counterpart of animal UCP2 or UCP3. This work brings the functional and genetic approaches together for the first time, providing strong support that AtPUMP1 is truly an UCP. (C) 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies.
Subject: recombinant plant uncoupling protein
reconstitution in liposome
fatty acid-induced proton flux
inhibition by purine nucleotide
Arabidopsis thaliana
Country: Holanda
Editor: Elsevier Science Bv
Citation: Febs Letters. Elsevier Science Bv, v. 505, n. 2, n. 240, n. 244, 2001.
Rights: fechado
Identifier DOI: 10.1016/S0014-5793(01)02835-6
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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