Back to Search
Start Over
Conserved functions of Arabidopsis mitochondrial late-acting maturation factors in the trafficking of iron‑sulfur clusters.
- Source :
-
Biochimica et biophysica acta. Molecular cell research [Biochim Biophys Acta Mol Cell Res] 2018 Sep; Vol. 1865 (9), pp. 1250-1259. Date of Electronic Publication: 2018 Jun 12. - Publication Year :
- 2018
-
Abstract
- Numerous proteins require iron‑sulfur (Fe-S) clusters as cofactors for their function. Their biogenesis is a multi-step process occurring in the cytosol and mitochondria of all eukaryotes and additionally in plastids of photosynthetic eukaryotes. A basic model of Fe-S protein maturation in mitochondria has been obtained based on studies achieved in mammals and yeast, yet some molecular details, especially of the late steps, still require investigation. In particular, the late-acting biogenesis factors in plant mitochondria are poorly understood. In this study, we expressed the factors belonging to NFU, BOLA, SUFA/ISCA and IBA57 families in the respective yeast mutant strains. Expression of the Arabidopsis mitochondrial orthologs was usually sufficient to rescue the growth defects observed on specific media and/or to restore the abundance or activity of the defective Fe-S or lipoic acid-dependent enzymes. These data demonstrate that the plant mitochondrial counterparts, including duplicated isoforms, likely retained their ancestral functions. In contrast, the SUFA1 and IBA57.2 plastidial isoforms cannot rescue the lysine and glutamate auxotrophies of the respective isa1-isa2Δ and iba57Δ strains or of the isa1-isa2-iba57Δ triple mutant when expressed in combination. This suggests a specialization of the yeast mitochondrial and plant plastidial factors in these late steps of Fe-S protein biogenesis, possibly reflecting substrate-specific interactions in these different compartments.<br /> (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Subjects :
- Arabidopsis genetics
Arabidopsis Proteins genetics
Cloning, Molecular
DNA-Binding Proteins genetics
DNA-Binding Proteins metabolism
Evolution, Molecular
Iron metabolism
Mitochondria genetics
Mitochondria metabolism
Mitochondrial Proteins genetics
Saccharomyces cerevisiae genetics
Sulfur metabolism
Arabidopsis metabolism
Arabidopsis Proteins metabolism
Mitochondrial Proteins metabolism
Saccharomyces cerevisiae growth & development
Subjects
Details
- Language :
- English
- ISSN :
- 0167-4889
- Volume :
- 1865
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Biochimica et biophysica acta. Molecular cell research
- Publication Type :
- Academic Journal
- Accession number :
- 29902489
- Full Text :
- https://doi.org/10.1016/j.bbamcr.2018.06.003