Structure and expression of the mouse gene encoding the orphan nuclear receptor TEC.
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 Spl 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.
Maltais
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Unit'e de recherche en g'en'etique humaine et mol'eculaire, Pavillon Saint-François d'Assise, CHUQ, Qc, Qu'ebec, Canada.
Labelle
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Y
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D019556:COS Cells; D002874:Chromosome Mapping; D004247:DNA / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D015870:Gene Expression; D006801:Humans; D066298:In Vitro Techniques; D051379:Mice; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D051381:Rats; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics* / Q000378:metabolism; D011987:Receptors, Steroid; D011988:Receptors, Thyroid Hormone; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D014157:Transcription Factors / Q000235:genetics; D015533:Transcriptional Activation
D004268:DNA-Binding Proteins; C539821:NR4A1 protein, human; C490412:NR4A3 protein, human; D009419:Nerve Tissue Proteins; C539818:Nr4a1 protein, mouse; C539820:Nr4a1 protein, rat; C490411:Nr4a3 protein, mouse; C091333:Nr4a3 protein, rat; D009687:Nuclear Proteins; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D020033:Protein Isoforms; D018160:Receptors, Cytoplasmic and Nuclear; D011987:Receptors, Steroid; D011988:Receptors, Thyroid Hormone; D014157:Transcription Factors; D004247:DNA