The cytosolic or the mitochondrial glutathione peroxidase‐type tryparedoxin peroxidase is sufficient to protect procyclic Trypanosoma brucei from iron‐mediated mitochondrial damage and lysis
The cytosolic or the mitochondrial glutathione peroxidase‐type tryparedoxin peroxidase is sufficient to protect procyclic Trypanosoma brucei from iron‐mediated mitochondrial damage and lysis
复制标题
胞浆或线粒体谷胱甘肽过氧化物酶型锥虫还蛋白过氧化物酶足以保护前循环布氏锥虫免受铁介导的线粒体损伤和裂解
DOI:
10.1111/mmi.13223
复制
发表时间:
2016
影响因子:
3.6
通讯作者:
Krauth-Siegel
中科院分区:
文献类型:
--
作者:
Schaffroth;Bogacz;Dirdjaja;Nissen;Krauth-Siegel
African trypanosomes express three virtually identical glutathione peroxidase (Px)‐type enzymes that occur in the cytosol (Px I and II) and mitochondrion (Px III) and detoxify fatty acid‐derived hydroperoxides. Selective deletion of the genes revealed that procyclicTrypanosoma bruceilacking either the cytosolic or mitochondrial enzyme proliferate nearly as wild‐type parasites, whereas the knockout of the complete genomic locus is lethal. Flow cytometry and immunofluorescence analyses revealed that the Px I‐III‐deficient parasites lose their mitochondrial membrane potential, which is followed by a loss of the lysosomal signal but not the glycosomal one. Mitochondrial damage and cell lysis are prevented by Trolox, ubiquinone derivatives and the iron chelator deferoxamine, whereas starch‐deferoxamine is inefficient. In glucose‐rich medium, cell death is attenuated suggesting that oxidants generated by the respiratory chain contribute to the lethal phenotype. Thus, the Px‐type peroxidases protect procyclic cells from an iron‐mediated oxidative membrane damage that originates at the mitochondrion. This contrasts with the situation in bloodstream cells, where the lysosome is the primarily affected organelle. Strikingly, either the cytosolic or the mitochondrial form of the peroxidases is required and sufficient to protect the mitochondrion and prevent cell lysis.
登录
查看更多内容
影响因子:
6.6
作者:
A. Tomás;H. Castro
通讯作者:
H. Castro
影响因子:
4.8
作者:
Ceylan, Sevgi;Seidel, Vera;Krauth-Siegel, R. Luise
通讯作者:
Krauth-Siegel, R. Luise
影响因子:
4.8
作者:
Smid, Ondrej;Horakova, Eva;Tachezy, Jan
通讯作者:
Tachezy, Jan
DOI:
--
发表时间:
2012
影响因子:
11.1
作者:
Mauro Serricchio;P. Bütikofer
通讯作者:
P. Bütikofer
影响因子:
21.3
作者:
Friedmann Angeli JP;Schneider M;Proneth B;Tyurina YY;Tyurin VA;Hammond VJ;Herbach N;Aichler M;Walch A;Eggenhofer E;Basavarajappa D;Rådmark O;Kobayashi S;Seibt T;Beck H;Neff F;Esposito I;Wanke R;Förster H;Yefremova O;Heinrichmeyer M;Bornkamm GW;Geissler EK;Thomas SB;Stockwell BR;O'Donnell VB;Kagan VE;Schick JA;Conrad M
通讯作者:
Conrad M