Structure and Expression of the Mouse Gene Encoding the Orphan Nuclear Receptor TEC

Maltais, Annie; Labelle, Yves
February 2000
DNA & Cell Biology;Feb2000, Vol. 19 Issue 2, p121
Academic Journal
Translocated in extraskeletal chondrosarcoma (TEC) is an orphan nuclear receptor involved in the control of cell proliferation and apoptosis and is expressed mainly in the mammalian central nervous system. To help understand the regulation of its expression, we have characterized the mouse genomic locus encoding TEC and analyzed its expression pattern in various tissues. The gene spans approximately 40 kb and contains 8 exons, of which the first two are noncoding. The promoter region does not contain any identifiable TATA box or CCAAT box elements; however, several binding sites for the transcription factors cyclic AMP-responsive element binding (CREB) protein and Sp1 are present. Two types of transcripts generated by alternative splicing were characterized by RT-PCR: one encodes the full-length receptor of 627 amino acids; the other encodes a truncated receptor of 429 amino acids lacking the entire carboxyl-terminal domain. Northern blots and RT-PCR analyses showed that mRNAs encoding both isoforms are expressed in all mouse tissues examined, with the highest levels being found in the brain. This expression pattern suggests that TEC may perform some basic housekeeping cellular function in addition to its role in cell proliferation.


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