RGD Reference Report - c-Myc directly regulates the transcription of the NBS1 gene involved in DNA double-strand break repair. - Rat Genome Database

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c-Myc directly regulates the transcription of the NBS1 gene involved in DNA double-strand break repair.

Authors: Chiang, YC  Teng, SC  Su, YN  Hsieh, FJ  Wu, KJ 
Citation: Chiang YC, etal., J Biol Chem. 2003 May 23;278(21):19286-91. Epub 2003 Mar 13.
RGD ID: 8554316
Pubmed: PMID:12637527   (View Abstract at PubMed)
DOI: DOI:10.1074/jbc.M212043200   (Journal Full-text)

The c-myc proto-oncogene encodes a ubiquitous transcription factor involved in the control of cell growth and implicated in inducing tumorigenesis. Understanding the function of c-Myc and its role in cancer depends upon the identification of c-Myc target genes. Nijmegen breakage syndrome (NBS) is a chromosomal-instability syndrome associated with cancer predisposition, radiosensitivity, and chromosomal instability. The NBS gene product, NBS1 (p95 or nibrin), is a part of the hMre11 complex, a central player associated with double-strand break (DSB) repair. NBS1 contains domains characteristic for proteins involved in DNA repair, recombination, and replication. Here we show that c-Myc directly activates NBS1. c-Myc-mediated induction of NBS1 gene transcription occurs in different tissues, is independent of cell proliferation, and is mediated by a c-Myc binding site in the intron 1 region of NBS1 gene. Overexpression of NBS1 in Rat1a cells increased cell proliferation. These results indicate that NBS1 is a direct transcriptional target of c-Myc and links the function of c-Myc to the regulation of DNA DSB repair pathway operating during DNA replication.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
regulation of fibroblast proliferation involved_inIDA 8554316PMID:12637527UniProt 

Objects Annotated

Genes (Rattus norvegicus)
Nbn  (nibrin)


Additional Information