The plant energy-dissipating mitochondrial systems : depicting the genomic structure and the expression profiles of the gene families of uncoupling protein and alternative oxidase in monocots and dicots

The simultaneous existence of alternative oxidases and uncoupling proteins in plants has raised the question as to why plants need two energy-dissipating systems with apparently similar physiological functions. A probably complete plant uncoupling protein gene family is described and the expression...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 57(2006), 4 vom: 31., Seite 849-64
1. Verfasser: Borecky, Jirí (VerfasserIn)
Weitere Verfasser: Nogueira, Fábio T S, de Oliveira, Kívia A P, Maia, Ivan G, Vercesi, Aníbal E, Arruda, Paulo
Format: Aufsatz
Sprache:English
Veröffentlicht: 2006
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Comparative Study Journal Article Research Support, Non-U.S. Gov't Carrier Proteins Ion Channels Membrane Proteins Mitochondrial Proteins Plant Proteins RNA, Messenger Uncoupling Protein 1 mehr... Oxidoreductases EC 1.- alternative oxidase
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245 1 4 |a The plant energy-dissipating mitochondrial systems  |b depicting the genomic structure and the expression profiles of the gene families of uncoupling protein and alternative oxidase in monocots and dicots 
264 1 |c 2006 
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520 |a The simultaneous existence of alternative oxidases and uncoupling proteins in plants has raised the question as to why plants need two energy-dissipating systems with apparently similar physiological functions. A probably complete plant uncoupling protein gene family is described and the expression profiles of this family compared with the multigene family of alternative oxidases in Arabidopsis thaliana and sugarcane (Saccharum sp.) employed as dicot and monocot models, respectively. In total, six uncoupling protein genes, AtPUMP1-6, were recognized within the Arabidopsis genome and five (SsPUMP1-5) in a sugarcane EST database. The recombinant AtPUMP5 protein displayed similar biochemical properties as AtPUMP1. Sugarcane possessed four Arabidopsis AOx1-type orthologues (SsAOx1a-1d); no sugarcane orthologue corresponding to Arabidopsis AOx2-type genes was identified. Phylogenetic and expression analyses suggested that AtAOx1d does not belong to the AOx1-type family but forms a new (AOx3-type) family. Tissue-enriched expression profiling revealed that uncoupling protein genes were expressed more ubiquitously than the alternative oxidase genes. Distinct expression patterns among gene family members were observed between monocots and dicots and during chilling stress. These findings suggest that the members of each energy-dissipating system are subject to different cell or tissue/organ transcriptional regulation. As a result, plants may respond more flexibly to adverse biotic and abiotic conditions, in which oxidative stress is involved 
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650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Membrane Proteins  |2 NLM 
650 7 |a Mitochondrial Proteins  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a RNA, Messenger  |2 NLM 
650 7 |a Uncoupling Protein 1  |2 NLM 
650 7 |a Oxidoreductases  |2 NLM 
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650 7 |a alternative oxidase  |2 NLM 
650 7 |a EC 1.-  |2 NLM 
700 1 |a Nogueira, Fábio T S  |e verfasserin  |4 aut 
700 1 |a de Oliveira, Kívia A P  |e verfasserin  |4 aut 
700 1 |a Maia, Ivan G  |e verfasserin  |4 aut 
700 1 |a Vercesi, Aníbal E  |e verfasserin  |4 aut 
700 1 |a Arruda, Paulo  |e verfasserin  |4 aut 
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