TTF1, Official Symbol TTF1provided by HGNC Official Full Name transcription termination factor 1provided by HGNC Primary source HGNC:HGNC:12397 See related Ensembl:ENSG00000125482 MIM:600777; AllianceGenome:HGNC:12397 Gene type protein coding RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as TTF-1; TTF-I Summary This gene encodes a transcription termination factor that is localized to the nucleolus and plays a critical role in ribosomal gene transcription. The encoded protein mediates the termination of RNA polymerase I transcription by binding to Sal box terminator elements downstream of pre-rRNA coding regions. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. This gene shares the symbol/alias 'TFF1' with another gene, NK2 homeobox 1, also known as thyroid transcription factor 1, which plays a role in the regulation of thyroid-specific gene expression. [provided by RefSeq, Apr 2011] Annotation information Note: TTF1 (GeneID 7270) and NKX2-1 (GeneID 7080) loci share the TTF1 symbol/alias in common. TTF1 is a widely used alternative name for thyroid transcription factor 1 (NKX2-1) conflicting with the official symbol for transcription termination factor, RNA polymerase I (TTF1). [13 Feb 2013] Expression Ubiquitous expression in thyroid (RPKM 5.3), testis (RPKM 4.8) and 25 other tissues See more Orthologs mouse all