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An uncharacterized central domain of CLU mitochondrial proteins Mutations in the mitochondrial CLU proteins have been shown to result in clustered mitochondria. CLU proteins include Saccharomyces cerevisiae clustered mitochondria protein (Clu1p, alias translation initiation factor 31/TIF31p), Dictyostelium discoideum clustered mitochondria protein homolog (CluA), Caenorhabditis elegans clustered mitochondria protein homolog (CLUH/ Protein KIAA0664), Drosophila clueless (alias clustered mitochondria protein homolog), Arabidopsis clustered mitochondria protein (CLU, alias friendly mitochondria protein/FMT), and human clustered mitochondria protein homolog (CLUH). Dictyostelium CluA is involved in mitochondrial dynamics and is necessary for both, mitochondrial fission and fusion. Drosophila clueless is essential for cytoplasmic localization and function of cellular mitochondria. The Drosophila clu gene interacts genetically with parkin (park, the Drosophila ortholog of a human gene responsible for many familial cases of Parkinson's disease). Arabidopsis CLU/FMT is required for correct mitochondrial distribution and morphology. The specific role CLU proteins play in mitochondrial processes in not yet known. In an early study, S. cerevisiae Clu1/TIF31p was reported as sometimes being associated with the elF3 translation initiation factor. The authors noted, however, that its tentative assignment as a subunit of elf3 was uncertain, and to date there has been no direct evidence for a role of this protein in translation. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",