Article (Scientific journals)
Subunit-subunit interactions and overall topology of the dimeric mitochondrial ATP synthase of Polytomella sp.
Cano-Estrada, Araceli; Vázquez-Acevedo, Miriam; Villavicencio-Queijeiro, Alexa et al.
2010In Biochimica et Biophysica Acta. Bioenergetics, 1797 (8), p. 1439-1448
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Keywords :
F1F0-ATP synthase; Oxidative phosphorylation; Dimeric mitochondrial complex V; Chlorophycean algae; Stator Stalk; Chlamydomonas reinhardtii; Polytomella sp.; ASA subunits
Abstract :
[en] Mitochondrial F(1)F(0)-ATP synthase of chlorophycean algae is a dimeric complex of 1600kDa constituted by 17 different subunits with varying stoichiometries, 8 of them conserved in all eukaryotes and 9 that seem to be unique to the algal lineage (subunits ASA1-9). Two different models proposing the topological assemblage of the nine ASA subunits in the ATP synthase of the colorless alga Polytomella sp. have been put forward. Here, we readdressed the overall topology of the enzyme with different experimental approaches: detection of close vicinities between subunits based on cross-linking experiments and dissociation of the enzyme into subcomplexes, inference of subunit stoichiometry based on cysteine residue labelling, and general three-dimensional structural features of the complex as obtained from small-angle X-ray scattering and electron microscopy image reconstruction. Based on the available data, we refine the topological arrangement of the subunits that constitute the mitochondrial ATP synthase of Polytomella sp.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Cano-Estrada, Araceli;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
Vázquez-Acevedo, Miriam;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
Villavicencio-Queijeiro, Alexa;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
Figueroa-Martínez, Francisco;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
Miranda Astudillo, Héctor Vicente ;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
Cordeiro, Yraima;  Universidade Federal do Rio de Janeiro > Faculdade de Farmácia
Mignaco, Julio A.;  Universidade Federal do Rio de Janeiro > Centro de Ciências da Saúde > Instituto de Bioquímica Médica
Foguel, Debora;  Universidade Federal do Rio de Janeiro > Centro de Ciências da Saúde > Instituto de Bioquímica Médica
Cardol, Pierre  ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Lapaille, Marie;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Remacle, Claire  ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Wilkens, Stephan;  SUNY Upstate Medical University > Department of Biochemistry & Molecular Biology
González-Halphen, Diego;  Universidad Nacional Autónoma de México > Instituto de Fisiología Celular > Departamento de Genética Molecular
More authors (3 more) Less
Language :
English
Title :
Subunit-subunit interactions and overall topology of the dimeric mitochondrial ATP synthase of Polytomella sp.
Publication date :
2010
Journal title :
Biochimica et Biophysica Acta. Bioenergetics
ISSN :
0005-2728
eISSN :
1879-2650
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
1797
Issue :
8
Pages :
1439-1448
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2010 Elsevier B.V. All rights reserved.
Available on ORBi :
since 19 May 2010

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