title: Identification of the mismatch repair genes PMS2 and MLH1 as p53 target genes by using serial analysis of binding elements.
abstract: The ability to determine the global location of transcription factor binding sites in vivo is important for a comprehensive understanding of gene regulation in human cells. We have developed a technology, called serial analysis of binding elements (SABE), involving subtractive hybridization of chromatin immunoprecipitation-enriched DNA fragments followed by the generation and analysis of concatamerized sequence tags. We applied the SABE technology to search for p53 target genes in the human genome, and have identified several previously described p53 targets in addition to numerous potentially novel targets, including the DNA mismatch repair genes MLH1 and PMS2. Both of these genes were determined to be responsive to DNA damage and p53 activation in normal human fibroblasts, and have p53-response elements within their first intron. These two genes may serve as a sensor in DNA repair mechanisms and a critical determinant for the decision between cell-cycle arrest and apoptosis. These results also demonstrate the potential for use of SABE as a broadly applicable means to globally identify regulatory elements for human transcription factors in vivo.
authors.affiliation: Department of Biochemistry and Molecular Biology, University of British Columbia, 2146 Health Sciences Mall, Vancouver, BC, Canada V6T 1Z3.
authors.forename: Jiguo
authors.initials: J
authors.lastname: Chen
authors.forename: Ivan
authors.initials: I
authors.lastname: Sadowski
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000251:Adenosine Triphosphatases / Q000235:genetics / Q000378:metabolism*; D020137:Base Pair Mismatch / Q000235:genetics*; D001665:Binding Sites / Q000235:genetics; D002352:Carrier Proteins; D047369:Chromatin Immunoprecipitation / Q000379:methods; D017931:DNA Primers; D045643:DNA Repair Enzymes / Q000235:genetics / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation; D015894:Genome, Human; D023281:Genomics / Q000379:methods*; D006801:Humans; D019169:Jurkat Cells; D008156:Luciferases; D000070976:Mismatch Repair Endonuclease PMS2; D000070957:MutL Protein Homolog 1; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D009693:Nucleic Acid Hybridization / Q000379:methods; D015345:Oligonucleotide Probes; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA / Q000379:methods; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D017931:DNA Primers; D004268:DNA-Binding Proteins; C501486:MLH1 protein, human; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D015345:Oligonucleotide Probes; D016159:Tumor Suppressor Protein p53; D008156:Luciferases; D000251:Adenosine Triphosphatases; C094934:PMS2 protein, human; D000070976:Mismatch Repair Endonuclease PMS2; D000070957:MutL Protein Homolog 1; D045643:DNA Repair Enzymes