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TRIM29 regulates the assembly of DNA repair proteins into damaged chromatin
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TRIM29 regulates the assembly of DNA repair proteins into damaged chromatin
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Journal Article
TRIM29 regulates the assembly of DNA repair proteins into damaged chromatin
2015
Overview
Although DNA double-strand break (DSB) repair is mediated by numerous proteins accumulated at DSB sites, how DNA repair proteins are assembled into damaged chromatin has not been fully elucidated. Here we show that a member of the tripartite motif protein family, TRIM29, is a histone-binding protein responsible for DNA damage response (DDR). We found that TRIM29 interacts with BRCA1-associated surveillance complex, cohesion, DNA-PKcs and components of TIP60 complex. The dynamics of the TRIM29-containing complex on H2AX nucleosomes is coordinated by a cross-talk between histone modifications. TRIM29 binds to modified histone H3 and H4 tails in the context of nucleosomes. Furthermore, chromatin binding of TRIM29 is required for the phosphorylation of H2AX and cell viability in response to ionizing radiation. Our results suggest that TRIM29 functions as a scaffold protein to assemble DNA repair proteins into chromatin followed by efficient activation of DDR.
Many proteins are assembled into damaged chromatins to repair DNA double-strand breaks (DSBs). Here, the authors show that TRIM29 binds to modified histone H3 and H4 tails following DSB formation and functions as a scaffold protein to assemble DNA repair proteins into chromatin.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 14/63
/ 38/77
/ 96/95
/ Damage
/ DNA
/ DNA Repair Enzymes - genetics
/ DNA Repair Enzymes - metabolism
/ DNA-Binding Proteins - genetics
/ DNA-Binding Proteins - metabolism
/ DNA-dependent protein kinase
/ Histone Acetyltransferases - metabolism
/ Homeodomain Proteins - genetics
/ Homeodomain Proteins - metabolism
/ Humanities and Social Sciences
/ Humans
/ MutS Homolog 2 Protein - genetics
/ MutS Homolog 2 Protein - metabolism
/ Proteins
/ Repair
/ Repressor Proteins - genetics
/ Repressor Proteins - metabolism
/ Science
/ Transcription Factors - genetics
/ Transcription Factors - metabolism
/ Tumor Suppressor Proteins - genetics
/ Tumor Suppressor Proteins - metabolism
/ Ubiquitin-Protein Ligases - metabolism
/ Yeast
