Structure, expression, and functional characterization of the mouse CLP-1 gene.
Mouse CLP-1, a potential cardiac transcriptional regulatory factor, is encoded by a single copy gene lacking introns that is expressed into two mRNAs via alternative polyadenylation. Both mRNAs encode the same 41 kDa protein, a novel protein that is 85.3% homologous with a human homologue called HIS1. Mouse CLP-1 is widely expressed in a number of tissues as well as in early development and is localized to the nucleus. The CLP-1 gene promoter is active in different cell types and sequence analysis shows a number of potential binding sites for cardiogenic transcription factors such as Nkx2.5 and GATA-4, indicating a potential role in development. CLP-1 appears to "squelch" the cardiac MLC-2v promoter in a concentration-dependent manner in cardiac but not other cell types, suggesting that CLP-1 may be interacting with a cardiac-specific factor to regulate cardiac MLC-2v expression. The overall expression pattern of CLP-1 is similar to that of LCR-F1 and Oct-1, two widely expressed transcription factors that also play specific roles in the transcription of cell-specific genes. CLP-1 may be a transcriptional mediator capable of interacting with and potentiating cell-specific transcription factors.
Huang
Facan
F
Department of Anatomy and Cell Biology, Center for Cardiovascular and Muscle Research, Box 5, State University of New York, Health Science Center at Brooklyn, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.
Wagner
Michael
M
Siddiqui
M A Q
MA
D000081:Acetamides / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D001419:Bacteria / Q000235:genetics; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D002460:Cell Line; D002478:Cells, Cultured; D004247:DNA / Q000737:chemistry / Q000235:genetics; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D004622:Embryo, Mammalian / Q000378:metabolism; D015870:Gene Expression; D018507:Gene Expression Regulation, Developmental; D005796:Genes / Q000235:genetics; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D009131:Muscle, Smooth, Vascular / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D018994:Myosin Light Chains / Q000235:genetics; D011401:Promoter Regions, Genetic / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins; D051381:Rats; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism
D000081:Acetamides; D018076:DNA, Complementary; C118642:Hexim1 protein, mouse; D018994:Myosin Light Chains; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D004247:DNA; D008156:Luciferases; C014026:hexamethylene bisacetamide