Abstract:
:Ataxia Telangiectasia (A-T) is a progressive childhood disorder characterized most notably by cerebellar degeneration and predisposition to cancer. A-T is caused by mutations in the kinase ATM, a master regulator of the DNA double-strand break response. In addition to DNA-damage signaling defects, A-T cells display mitochondrial dysfunction that is thought to contribute to A-T pathogenesis. However, the molecular mechanism leading to mitochondrial dysfunction in A-T remains unclear. Here, we show that lack of ATM leads to reduced mitochondrial DNA (mtDNA) integrity and mitochondrial dysfunction, which are associated to defective mtDNA repair. While protein levels of mtDNA repair proteins are essentially normal, in the absence of ATM levels specifically of DNA ligase III (Lig3), the only DNA ligase working in mitochondria is reduced. The reduction of Lig3 is observed in different A-T patient cells, in brain and pre-B cells derived from ATM knockout mice as well as upon transient or stable knockdown of ATM. Furthermore, pharmacological inhibition of Lig3 in wild type cells phenocopies the mtDNA repair defects observed in A-T patient cells. As targeted deletion of LIG3 in the central nervous system causes debilitating ataxia in mice, reduced Lig3 protein levels and the consequent mtDNA repair defect may contribute to A-T neurodegeneration. A-T is thus the first disease characterized by diminished Lig3.
journal_name
DNA Repair (Amst)journal_title
DNA repairauthors
Sharma NK,Lebedeva M,Thomas T,Kovalenko OA,Stumpf JD,Shadel GS,Santos JHdoi
10.1016/j.dnarep.2013.11.002subject
Has Abstractpub_date
2014-01-01 00:00:00pages
22-31eissn
1568-7864issn
1568-7856pii
S1568-7864(13)00284-Xjournal_volume
13pub_type
杂志文章相关文献
DNA REPAIR文献大全abstract::Mononucleotide microsatellites are tandem repeats of a single base pair, abundant within coding exons and frequent sites of mutation in the human genome. Because the repeated unit is one base pair, multiple mechanisms of insertion/deletion (indel) mutagenesis are possible, including strand-slippage, dNTP-stabilized, a...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2015.02.016
更新日期:2015-05-01 00:00:00
abstract::We studied how DNA divergence between recombining DNAs and the mismatch repair system modulate the SOS response in Escherichia coli. The observed positive log-linear correlation between SOS induction and DNA divergence, and the negative correlation between SOS induction and frequency of recombination, suggest that the...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2004.09.008
更新日期:2005-02-03 00:00:00
abstract::In both Schizosaccharomyces pombe and Saccharomyces cerevisiae, Mms22 and Mms1 form a complex with important functions in the response to DNA damage, loss of which leads to perturbations during replication. Furthermore, in S. cerevisiae, Mms1 has been suggested to function in concert with a Cullin-like protein, Rtt101...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2010.11.013
更新日期:2011-03-07 00:00:00
abstract::Brh2, the BRCA2 ortholog in the fungus Ustilago maydis, harbors two different DNA-binding domains, one located in the N-terminal region and the other located in the C-terminal region. Here we were interested in comparing the biochemical properties of Brh2 fragments, Brh2(NT) and Brh2(CT), respectively, harboring the t...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2014.07.013
更新日期:2014-10-01 00:00:00
abstract::Cadmium (Cd(2+)) is a ubiquitous environmental pollutant and human carcinogen. The molecular basis of its toxicity remains unclear. Here, to identify the landscape of genes and cell functions involved in cadmium resistance, we have screened the Saccharomyces cerevisiae deletion collection for mutants sensitive to cadm...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.04.005
更新日期:2008-08-02 00:00:00
abstract::Artemis and PALF (also called APLF) appear to be among the primary nucleases involved in non-homologous end joining (NHEJ) and responsible for most nucleolytic end processing in NHEJ. About 60% of NHEJ events show an alignment of the DNA ends that use 1 or 2bp of microhomology (MH) between the two DNA termini. Thus, M...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2014.02.006
更新日期:2014-05-01 00:00:00
abstract::The dnaN gene in eubacteria is an essential gene that encodes the beta subunit of replicative DNA polymerase. Nearly all eubacterial genomes sequenced to date predict a single copy of the dnaN gene in a well-conserved neighboring gene context. However, 19 genomes out of 348 scanned, including Bacillus anthracis, Bacil...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.10.003
更新日期:2008-03-01 00:00:00
abstract::XPC is one of the key DNA damage recognition proteins in the global genome repair route of the nucleotide excision repair (NER) pathway. Previously, we demonstrated that NER-deficient mouse models Xpa(-/-) and Xpc(-/-) exhibit a divergent spontaneous tumor spectrum and proposed that XPC might be functionally involved ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2013.08.019
更新日期:2013-12-01 00:00:00
abstract::Although correlative studies demonstrate a reduction in the expression of apurinic/apyrimidinic endonuclease/redox effector factor (Ape1/Ref-1 or Ape1) in neural tissues after neuronal insult, the role of Ape1 in regulating neurotoxicity remains to be elucidated. To address this issue, we examined the effects of reduc...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2004.11.006
更新日期:2005-03-02 00:00:00
abstract::Reactive oxygen and nitrogen species (RONS) are formed as byproducts of many endogenous cellular processes, in response to infections, and upon exposure to various environmental factors. An increase in RONS can saturate the antioxidation system and leads to oxidative stress. Consequently, macromolecules are targeted f...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2019.02.006
更新日期:2019-04-01 00:00:00
abstract::With the publication of the first paper describing the biochemical properties of DNA polymerase iota (polɩ), the question immediately arose as to why cells harbor such a low-fidelity enzyme which often violates the Watson-Crick base pairing rules? Yet 20 years after its discovery, the cellular function of polɩ remains...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2020.102914
更新日期:2020-09-01 00:00:00
abstract::Translesion synthesis (TLS) with specialized DNA polymerases allows dealing with a base lesion on the template strand during DNA replication; a base is inserted opposite the lesion, correctly or incorrectly, depending on the lesion, the involved DNA polymerase(s) and the sequence context. The major oxidized DNA base 8...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2014.08.002
更新日期:2014-10-01 00:00:00
abstract::Maintenance of the mitochondrial genome (mtDNA) is essential for proper cellular function. The accumulation of damage and mutations in the mtDNA leads to diseases, cancer, and aging. Mammalian mitochondria have proficient base excision repair, but the existence of other DNA repair pathways is still unclear. Deficienci...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.01.021
更新日期:2009-06-04 00:00:00
abstract::Flaws in the DNA replication process have emerged as a leading driver of genome instability in human diseases. Alteration to replication fork progression is a defining feature of replication stress and the consequent failure to maintain fork integrity and complete genome duplication within a single round of S-phase co...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2018.08.017
更新日期:2018-11-01 00:00:00
abstract::We had shown previously that DNA polymerase beta (beta-pol) null mouse fibroblasts, deficient in base excision repair (BER), are hypersensitive to monofunctional methylating agents but not to hydrogen peroxide (H2O2). This is surprising because beta-pol is thought to be involved in BER of oxidative as well as methylat...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/s1568-7864(02)00008-3
更新日期:2002-04-29 00:00:00
abstract::The Tousled-like kinases are involved in chromatin assembly, DNA repair, transcription, and chromosome segregation. In this work, we show that overexpression of TLK1B hastens repair of double strand breaks (DSBs) in mouse cells. We have identified Rad9 as a protein interacting tightly with TLK1B. TLK1B phosphorylates ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.09.005
更新日期:2009-01-01 00:00:00
abstract::Nucleotide excision repair (NER) is a DNA repair pathway, which eliminates various types of helix-distorting DNA damage including some forms of oxidative damage and UV-induced photoproducts. To understand why patients with NER-defective disorders develop progressive neurological abnormalities, we investigated NER capa...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2006.12.006
更新日期:2007-05-01 00:00:00
abstract::Eukaryotic genomes are duplicated by a complex machinery, utilizing high fidelity replicative B-family DNA polymerases (pols) α, δ and ε. Specialized error-prone pol ζ, the fourth B-family member, is recruited when DNA synthesis by the accurate trio is impeded by replication stress or DNA damage. The damage tolerance ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2016.11.004
更新日期:2017-01-01 00:00:00
abstract::Human APOBEC3G (A3G) and activation-induced deaminase (AID) belong to a family of DNA-cytosine deaminases. While A3G targets the last C in a run of C's, AID targets C in the consensus sequence WRC (W is A or T and R is a purine). Guided by the structures of the A3G carboxyl-terminal catalytic domain (A3G-CTD), we iden...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2010.02.010
更新日期:2010-05-04 00:00:00
abstract::recX is a small open reading frame located downstream of recA that is conserved in many bacteria. In Escherichia coli, the recX gene (also named oraA) is a 501 bp open reading frame that encodes a predicted basic protein. Transcriptional analysis by Northern blots showed that in E. coli the recX gene is SOS-regulated....
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/s1568-7864(02)00217-3
更新日期:2003-03-01 00:00:00
abstract::Bladder cancer risk is highly influenced by environmental and/or predisposing genetic factors. In the last decades growing evidence of the major role played by DNA repair systems in the developing of bladder cancer has been provided. To better investigate the involvement of DNA repair genes previously reported to be s...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.12.002
更新日期:2010-02-04 00:00:00
abstract::Exposure to ionizing radiation results in a variety of genome rearrangements that have been linked to tumor formation. Many of these rearrangements are thought to arise from the repair of double-strand breaks (DSBs) by several mechanisms, including homologous recombination (HR) between repetitive sequences dispersed t...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.02.003
更新日期:2008-05-03 00:00:00
abstract::Base excision repair (BER) of damaged or inappropriate bases in DNA has been reported to take place by single nucleotide insertion or through incorporation of several nucleotides, termed short-patch and long-patch repair, respectively. We found that extracts from proliferating and non-proliferating cells both had capa...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.04.002
更新日期:2009-07-04 00:00:00
abstract::Oxidatively induced DNA lesions have been implicated in the etiology of many diseases (including cancer) and in aging. Repair of oxidatively damaged bases in all organisms occurs primarily via the DNA base excision repair (BER) pathway, initiated with their excision by DNA glycosylases. Only two mammalian DNA glycosyl...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2006.10.011
更新日期:2007-04-01 00:00:00
abstract::Accumulation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) in DNA is associated with mutagenesis and cell death. Little attention has been given to the biological significance of 8-oxo-dG accumulation in cardiovascular tissues during the different stage of hypertension and its prevention. We thus investigated the ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.01.003
更新日期:2007-06-01 00:00:00
abstract::In budding yeast, the Rad9 protein is an important player in the maintenance of genomic integrity and has a well-characterised role in DNA damage checkpoint activation. Recently, roles for different post-translational histone modifications in the DNA damage response, including H2A serine 129 phosphorylation and H3 lys...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2006.03.005
更新日期:2006-06-10 00:00:00
abstract::Analysis of the spectrum of UV-induced mutations generated in synchronized wild-type S-phase cells reveals that only approximately 25% of mutations occur at thymine (T), whilst 75% are targeted to cytosine (C). The mutational spectra changes dramatically in XP-V cells, devoid of poleta, where approximately 45% of muta...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2005.09.011
更新日期:2006-02-03 00:00:00
abstract::The efficiency and fidelity of nucleotide incorporation and next-base extension by DNA polymerase (pol) κ past N(2)-ethyl-Gua were measured using steady-state and rapid kinetic analyses. DNA pol κ incorporated nucleotides and extended 3' termini opposite N(2)-ethyl-Gua with measured efficiencies and fidelities similar...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2010.09.007
更新日期:2011-01-02 00:00:00
abstract::The Karpas-620 human myeloma cell line (HMCL) expresses high levels of Cyclin D1 (CCND1), but has a der(8)t(8;11) and a der(14)t(8;14), and not a conventional t(11;14). Fluorescent in situ hybridization (FISH) and array comparative genomic hybridization (aCGH) studies suggest that der(14)t(11;14) from a primary transl...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.11.010
更新日期:2009-03-01 00:00:00
abstract::In higher eukaryotes DNA double strand breaks (DSBs) are repaired by homologous recombination (HRR) or non-homologous end joining (NHEJ). In addition to the DNA-PK dependent pathway of NHEJ (D-NHEJ), cells employ a backup pathway (B-NHEJ) utilizing Ligase III and PARP-1. The cell cycle dependence and coordination of t...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.11.008
更新日期:2008-02-01 00:00:00