Mimicking a SURF1 allele reveals uncoupling of cytochrome c oxidase assembly from translational regulation in yeast.
Mimicking a SURF1 allele reveals uncoupling of cytochrome c oxidase assembly from translational regulation in yeast.
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模仿 SURF1 等位基因揭示了酵母中细胞色素 C 氧化酶组装与翻译调控的解偶联
DOI:
10.1093/hmg/ddr145
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发表时间:
2011
影响因子:
3.5
通讯作者:
Rehling
中科院分区:
文献类型:
--
作者:
Reinhold;Bareth;Balleininger;Wissel;Rehling
Defects in mitochondrial energy metabolism lead to severe human disorders, mainly affecting tissues especially dependent on oxidative phosphorylation, such as muscle and brain. Leigh Syndrome describes a severe encephalomyopathy in infancy, frequently caused by mutations inSURF1. SURF1, termed Shy1 inSaccharomyces cerevisiae, is a conserved assembly factor for the terminal enzyme of the respiratory chain, cytochromecoxidase. Although the molecular function of SURF1/Shy1 is still enigmatic, loss of function leads to cytochromecoxidase deficiency and reduced expression of the central subunit Cox1 in yeast. Here, we provide insights into the molecular mechanisms leading to disease through missense mutations in codons of the most conserved amino acids in SURF1. Mutations affecting G124do not compromise import of the SURF1 precursor protein but lead to fast turnover of the mature protein within the mitochondria. Interestingly, an Y274D exchange neither affects stability nor localization of the protein. Instead, SURF1Y274Daccumulates in a 200 kDa cytochromecoxidase assembly intermediate. Using yeast as a model, we demonstrate that the corresponding Shy1Y344Dis able to overcome the stage where cytochromecoxidase assembly links to the feedback regulation of mitochondrial Cox1 expression. However, Shy1Y344Dimpairs the assembly at later steps, most apparent at low temperature and exhibits a dominant-negative phenotype upon overexpression. Thus, exchanging the conserved tyrosine (Y344) with aspartate in yeast uncouples translational regulation of Cox1 from cytochromecoxidase assembly and provides evidence for the dual functionality of Shy1.
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影响因子:
9.8
作者:
Antonicka, H;Mattman, A;Shoubridge, EA
通讯作者:
Shoubridge, EA
DOI:
10.1073/pnas.81.15.4819
发表时间:
1984-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
YAFFE, MP;SCHATZ, G
通讯作者:
SCHATZ, G
影响因子:
11.4
作者:
TZAGOLOFF, A;CAPITANIO, N;GATTI, D
通讯作者:
GATTI, D
DOI:
10.1038/nrm3029
发表时间:
2011-01
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
1.4
作者:
A. V. Riesen;H. Antonicka;A. Ohlenbusch;E. Shoubridge;E. Wilichowski
通讯作者:
E. Wilichowski