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Fanconi Anemia Core Complex Gene Promoters Harbor Conserved Transcription Regulatory Elements
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Fanconi Anemia Core Complex Gene Promoters Harbor Conserved Transcription Regulatory Elements
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Journal Article
Fanconi Anemia Core Complex Gene Promoters Harbor Conserved Transcription Regulatory Elements
2011
Overview
The Fanconi anemia (FA) gene family is a recent addition to the complex network of proteins that respond to and repair certain types of DNA damage in the human genome. Since little is known about the regulation of this novel group of genes at the DNA level, we characterized the promoters of the eight genes (FANCA, B, C, E, F, G, L and M) that compose the FA core complex. The promoters of these genes show the characteristic attributes of housekeeping genes, such as a high GC content and CpG islands, a lack of TATA boxes and a low conservation. The promoters functioned in a monodirectional way and were, in their most active regions, comparable in strength to the SV40 promoter in our reporter plasmids. They were also marked by a distinctive transcriptional start site (TSS). In the 5' region of each promoter, we identified a region that was able to negatively regulate the promoter activity in HeLa and HEK 293 cells in isolation. The central and 3' regions of the promoter sequences harbor binding sites for several common and rare transcription factors, including STAT, SMAD, E2F, AP1 and YY1, which indicates that there may be cross-connections to several established regulatory pathways. Electrophoretic mobility shift assays and siRNA experiments confirmed the shared regulatory responses between the prominent members of the TGF-β and JAK/STAT pathways and members of the FA core complex. Although the promoters are not well conserved, they share region and sequence specific regulatory motifs and transcription factor binding sites (TBFs), and we identified a bi-partite nature to these promoters. These results support a hypothesis based on the co-evolution of the FA core complex genes that was expanded to include their promoters.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Anemia
/ Biology
/ DNA
/ Electrophoretic Mobility Shift Assay
/ Fanconi Anemia Complementation Group A Protein - genetics
/ Fanconi Anemia Complementation Group C Protein - genetics
/ Fanconi Anemia Complementation Group E Protein - genetics
/ Fanconi Anemia Complementation Group F Protein - genetics
/ Fanconi Anemia Complementation Group G Protein - genetics
/ Fanconi Anemia Complementation Group L Protein - genetics
/ Fanconi Anemia Complementation Group Proteins - genetics
/ Genes
/ Genomes
/ Genomics
/ Humans
/ Insects
/ Kinases
/ Pathways
/ Plasmids
/ Promoter Regions, Genetic - genetics
/ Proteins
/ Regulatory Elements, Transcriptional - genetics
/ siRNA
/ Transcription Factors - genetics
/ Transcription Factors - metabolism
