Abstract
Xenopus transcription factor, termed TFIIIA, is the first eukaryotic transcription factor purified to homogeneity and one of the most extensively characterized polymerase III gene factors at the levels both of the protein and its gene. It is an abundant protein in oocytes and is specifically required for the 5S RNA gene transcription. It promotes the formation of a stable transcription complex by first binding to the internal control region of the 5S RNA gene through its zinc finger motifs. It contains two structural domains and associates with 5S RNA to form 7S ribonucleoprotein particles in oocytes. Its expression is developmentally controlled at the level of transcription and translation. It participates in the assembly of active chromatin templates and, at least in part, is responsible for the differential expression of two kinds of RS RNA genes inXenopus.
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Shastry, B.S. Transcription factor IIIA (TFIIIA): An update. Experientia 49, 831–835 (1993). https://doi.org/10.1007/BF01952592
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DOI: https://doi.org/10.1007/BF01952592