ABT1, also known as Activator of Basal Transcription 1, is a protein that plays a critical role in the regulation of gene expression by promoting the initiation of transcription. It is a component of the RNA polymerase I (Pol I) transcription machinery, which is responsible for transcribing ribosomal RNA (rRNA) genes to generate ribosomal RNA transcripts. One of the primary functions of ABT1 is its role as a transcription factor that binds to specific DNA sequences within the promoter regions of rRNA genes. By binding to these promoter sequences, ABT1 recruits other transcription factors and the RNA polymerase I complex to...