Difference between revisions of "Kruessel 2014 Plant Physiol"
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{{Publication | {{Publication | ||
|title=Krüßel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM (2014) The mitochondrial sulfur dioxygenase ETHYLMALONIC ENCEPHALOPATHY PROTEIN1 is required for amino acid catabolism during carbohydrate starvation and embryo development in Arabidopsis. Plant Physiol 165: 92-104. | |title=Krüßel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM (2014) The mitochondrial sulfur dioxygenase ETHYLMALONIC ENCEPHALOPATHY PROTEIN1 is required for amino acid catabolism during carbohydrate starvation and embryo development in Arabidopsis. Plant Physiol 165:92-104. | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/24692429 PMID: 24692429] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/24692429 PMID: 24692429] | ||
|authors=Kruessel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM | |authors=Kruessel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM | ||
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|area=Respiration, Genetic knockout;overexpression | |area=Respiration, Genetic knockout;overexpression | ||
|taxonomic group=Plants | |taxonomic group=Plants | ||
|preparations=Isolated | |preparations=Isolated mitochondria | ||
|substratestates=Other combinations | |substratestates=Other combinations | ||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
|additional=Alternative oxidase | |additional=Alternative oxidase | ||
}} | }} | ||
Revision as of 13:06, 24 February 2015
| Krüßel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM (2014) The mitochondrial sulfur dioxygenase ETHYLMALONIC ENCEPHALOPATHY PROTEIN1 is required for amino acid catabolism during carbohydrate starvation and embryo development in Arabidopsis. Plant Physiol 165:92-104. |
Kruessel L, Junemann J, Wirtz M, Birke H, Thornton JD, Browning LW, Poschet G, Hell R, Balk J, Braun HP, Hildebrandt TM (2014) Plant Physiol
Abstract: The sulfur dioxygenase ETHYLMALONIC ENCEPHALOPATHY PROTEIN1 (ETHE1) catalyzes the oxidation of persulfides in the mitochondrial matrix and is essential for early embryo development in Arabidopsis (Arabidopsis thaliana). We investigated the biochemical and physiological functions of ETHE1 in plant metabolism using recombinant Arabidopsis ETHE1 and three transfer DNA insertion lines with 50% to 99% decreased sulfur dioxygenase activity. Our results identified a new mitochondrial pathway catalyzing the detoxification of reduced sulfur species derived from cysteine catabolism by oxidation to thiosulfate. Knockdown of the sulfur dioxygenase impaired embryo development and produced phenotypes of starvation-induced chlorosis during short-day growth conditions and extended darkness, indicating that ETHE1 has a key function in situations of high protein turnover, such as seed production and the use of amino acids as alternative respiratory substrates during carbohydrate starvation. The amino acid profile of mutant plants was similar to that caused by defects in the electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase complex and associated dehydrogenases. Thus, in addition to sulfur amino acid catabolism, ETHE1 also affects the oxidation of branched-chain amino acids and lysine.
• O2k-Network Lab: DE Duesseldorf Grieshaber MK
Labels: MiParea: Respiration, Genetic knockout;overexpression
Preparation: Isolated mitochondria
HRR: Oxygraph-2k
Alternative oxidase
