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GenomicsRif1 Prevents Resection of DNA Breaks and Promotes Immunoglobulin Class Switching
DNA double-strand breaks (DSBs) represent a threat to the genome because they can lead to loss of genetic information and chromosome rearrangements. The DNA repair protein p53 binding protein 1 (53BP1) protects the genome by limiting nucleolytic processing of DSBs by a mechanism that requires its ph...
ORGANISM(S): Mus musculus 
2013-03-01 | E-GEOD-42298 | biostudies-arrayexpress
GenomicsGenome wide localization of Activation induced cytidine deaminase (AID), Spt5, and RNA Polymerase II (PolII) in mouse
Activation induced cytidine deaminase (AID) initiates antibody gene diversification by creating U:G mismatches. However, AID is not specific for antibody genes. Off-target lesions can activate oncogenes or cause chromosome translocations. Despite its importance in these key transactions little is kn...
ORGANISM(S): Mus musculus 
2010-10-05 | E-GEOD-24178 | biostudies-arrayexpress
TranscriptomicsEpigenetic targeting of activation-induced cytidine deaminase
Precisely how AID is recruited to these off-target sites is not entirely understood. To gain further insight into how AID selects its targets we compared AID-mediated translocations in two different cell types, B cells and mouse embryonic fibroblasts (MEFs). AID targets a distinct set of hotspots in...
ORGANISM(S): Mus musculus 
2015-01-30 | E-GEOD-61523 | biostudies-arrayexpress
GenomicsPTIP promotes chromatin changes critical for immunoglobulin class switch recombination
Programmed genetic rearrangements in lymphocytes require transcription at antigen receptor genes to promote accessibility for initiating double-strand break (DSB) formation critical for DNA recombination and repair. Here we show that activated B cells deficient in the PTIP component of the MLL3 (mix...
ORGANISM(S): Mus musculus 
2010-08-25 | E-GEOD-20852 | biostudies-arrayexpress
TranscriptomicsNext Generation Sequencing Analysis of Wild Type and 53BP1-/- Transcriptomes in B lymphocytes
Absence of 53BP1 influences the profile of DNA rearrangements in B lymphocytes.To determine whether the differences in translocation partner choice were due to differences in transcription, we compared the transcriptome of 53BP1 deficient and wild-type B cells by RNA-Seq and Polymerase II chromatin ...
ORGANISM(S): Mus musculus 
2013-02-12 | E-GEOD-42350 | biostudies-arrayexpress
TranscriptomicsB cell super-enhancers and regulatory clusters recruit AID tumorigenic activity
The antibody gene mutator AID promiscuously damages oncogenes and B cell identity genes leading to chromosomal translocations and tumorigenesis. Why non-immunoglobulin loci are susceptible to AID activity is unknown. Here we study AID-mediated lesions in the context of nuclear architecture and the B...
ORGANISM(S): Mus musculus 
2014-12-04 | E-GEOD-62063 | biostudies-arrayexpress
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