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FMT, a protein that affects mitochondrial distribution, interacts with translation-related proteins in Arabidopsis thaliana
Key message Two translation-related proteins are identified as FMT-interacting proteins. However, FMT, unlike mutants of other CLU genes in fly and human, has no clear impact on the accumulation of mitochondrial proteins. Organelle distribution is critical for effective metabolism and stress respons...
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Published in: | Plant cell reports 2021-02, Vol.40 (2), p.327-337 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Key message
Two translation-related proteins are identified as FMT-interacting proteins. However, FMT, unlike mutants of other
CLU
genes in fly and human, has no clear impact on the accumulation of mitochondrial proteins.
Organelle distribution is critical for effective metabolism and stress response and is controlled by various environmental factors.
Clustered mitochondria
(
CLU
) superfamily genes affect mitochondrial distribution and their disruptions cause mitochondria to cluster within a cell in various species including yeast, fly, mammals and
Arabidopsis
. In
Arabidopsis thaliana
,
Friendly mitochondria
(
FMT
) is a
CLU
gene that is required for normal mitochondrial distribution, but its molecular function is unclear. Here, we demonstrate that FMT interacts with some translation-related proteins (translation initiation factor eIFiso4G1 and glutamyl-tRNA synthetase OVA9), as well as itself. We also show FMT forms dynamic particles in the cytosol that sometimes move with mitochondria, and their movements are mainly controlled by actin filaments but also by microtubules. Similar results have been reported for animal
CLU
orthologs. However, an
fmt
mutant, unlike animal
clu
mutants, did not show any clear decrease of nuclear-encoded mitochondrial protein levels. This difference may reflect a functional divergence of
FMT
from other
CLU
superfamily genes. |
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ISSN: | 0721-7714 1432-203X |
DOI: | 10.1007/s00299-020-02634-9 |