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RESEARCH PRODUCT
Reciprocal regulation of the human sterol regulatory element binding protein (SREBP)-1a promoter by Sp1 and EGR-1 transcription factors.
Marta CasadoGerardo López-rodasGemma TurAna Julia Fernández-alvarezsubject
Egr-1Chromatin ImmunoprecipitationSp1 Transcription FactorSREBP-1aResponse elementMolecular Sequence DataBiophysicsElectrophoretic Mobility Shift AssayBiologyBiochemistrySp1Cell LineUpstream activating sequenceStructural BiologyTranscription (biology)Sequence Homology Nucleic AcidGene expressionGeneticsHumansPromoter Regions GeneticMolecular BiologyTranscription factorGeneral transcription factorBase SequenceReverse Transcriptase Polymerase Chain ReactionPromoterPromoterCell BiologySterol regulatory element-binding proteinBiochemistryEarly Growth Response Transcription Factorslipids (amino acids peptides and proteins)Gene expressionSterol Regulatory Element Binding Protein 1description
AbstractSterol regulatory element binding protein (SREBP)-1a is a transcription factor that is highly expressed in actively growing cells, and is involved in the biosynthesis of cholesterol, fatty acids and phospholipids. We have mapped the minimal human SREBP-1a promoter region to 75bp upstream of the translation start site where we discovered a functional role for the 3 GC-boxes containing overlapping sites for the Sp1 and EGR-1 transcription factors. Intact SP1-binding sites are essential for promoter activity, whereas EGR-1 suppresses the transcription of the human SREBP-1a promoter. These results reveal a novel physiologically relevant transcriptional mechanism for the reciprocal regulation of the SREBP-1a expression.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-10-17 | FEBS letters |