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  • Title: Identification of a new coiled body component.
    Author: Alliegro MC, Alliegro MA.
    Journal: Exp Cell Res; 1997 Mar 15; 231(2):386-90. PubMed ID: 9087179.
    Abstract:
    Coiled bodies are small, round nuclear inclusions that have been identified in many somatic cell types. Equivalent structures are found in the germinal vesicles of amphibian and insect oocytes, known respectively as sphere organelles and Binnenkörper. Their functions are not known, but their molecular composition is being brought to light. In addition to the nucleolar protein, fibrillarin, coiled bodies contain DNA topoisomerase I and an array of RNA processing molecules characteristic of spliceosomes. One coiled body protein absent from nucleoli and spliceosomes, known as p80-coilin, has also been described. We have now identified pigpen, a new member of the EWS family of proteins, as a second protein enriched in coiled bodies. In an earlier report we found that pigpen's structure and expression pattern were suggestive of a role in endothelial cell proliferation and differentiation. In this brief report we characterize pigpen's nuclear compartment and describe its reorganization during mitosis.
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