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231223s2007 xx ||||| 00| ||eng c |
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|a (NLM)17595195
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Niessen, Markus
|e verfasserin
|4 aut
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|a Mitochondrial glycolate oxidation contributes to photorespiration in higher plants
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 02.01.2008
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The oxidation of glycolate to glyoxylate is an important reaction step in photorespiration. Land plants and charophycean green algae oxidize glycolate in the peroxisome using oxygen as a co-factor, whereas chlorophycean green algae use a mitochondrial glycolate dehydrogenase (GDH) with organic co-factors. Previous analyses revealed the existence of a GDH in the mitochondria of Arabidopsis thaliana (AtGDH). In this study, the contribution of AtGDH to photorespiration was characterized. Both RNA abundance and mitochondrial GDH activity were up-regulated under photorespiratory growth conditions. Labelling experiments indicated that glycolate oxidation in mitochondrial extracts is coupled to CO(2) release. This effect could be enhanced by adding co-factors for aminotransferases, but is inhibited by the addition of glycine. T-DNA insertion lines for AtGDH show a drastic reduction in mitochondrial GDH activity and CO(2) release from glycolate. Furthermore, photorespiration is reduced in these mutant lines compared with the wild type, as revealed by determination of the post-illumination CO(2) burst and the glycine/serine ratio under photorespiratory growth conditions. The data show that mitochondrial glycolate oxidation contributes to photorespiration in higher plants. This indicates the conservation of chlorophycean photorespiration in streptophytes despite the evolution of leaf-type peroxisomes
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|a Journal Article
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|a Arabidopsis Proteins
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|a Glycolates
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|a RNA, Messenger
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|a Carbon Dioxide
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|a 142M471B3J
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|a Alcohol Oxidoreductases
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|a EC 1.1.-
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|a GDH protein, Arabidopsis
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|a EC 1.1.1.-
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|a Thiruveedhi, Krishnaveni
|e verfasserin
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|a Rosenkranz, Ruben
|e verfasserin
|4 aut
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|a Kebeish, Rashad
|e verfasserin
|4 aut
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|a Hirsch, Heinz-Josef
|e verfasserin
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|a Kreuzaler, Fritz
|e verfasserin
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|a Peterhänsel, Christoph
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 58(2007), 10 vom: 19., Seite 2709-15
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:58
|g year:2007
|g number:10
|g day:19
|g pages:2709-15
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