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Similar to the translational system in the cell cytoplasm, the initiation, elongation, and termination of protein synthesis in the mitochondria of eukaryotes are catalyzed by several protein factors. These factors, from the viewpoint of evolution, are more closely related to the corresponding prokaryotic factors than to those in the eukaryotic cytoplasm. In this paper, we isolated two cDNAs coding...
Maintenance of different organelles in eukaryotic cells depends on sorting proteins, which ensure the proper delivery of organelle-specific proteins. The studies on yeast (Saccharomyces cerevisiae) VPS35, a hydrophilic membrane protein having a direct role in the retrieval of cargo proteins, suggest a mechanism underlying a possible lysosomal protein-sorting pathway in mammalian cells. Here, we report...
DEAD-box proteins are a large group of putative RNA helicases that exist ubiquitously in organisms ranging from bacteria to humans. They are likely to play important roles in many different RNA metabolic processes. In this paper, we report the cloning of human DDX24, a putative DEAD-box protein, and its ortholog, Ddx24 in mouse. The deduced proteins encoded by these two cDNAs share 78.7% identity...
A novel cDNA encoding a putative Ser/Thr protein kinase was isolated from a human skeletal muscle cDNA library. It contains an open reading frame that extends from nt 104 to 1510 and codes for a protein of 469 amino acids. A catalytic domain containing the conserved residues of the Ser/Thr protein kinase, especially human ribosome protein S6 kinase (RSK), was found to be located in the C-terminal...
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