Abstract:
:Deinococcus radiodurans survives extremely high doses of ionizing and ultraviolet radiation and treatment with various DNA-damaging chemicals. As an effort to identify and characterize proteins that function in DNA repair in this organism, we have studied the protein encoded by locus DR1572. This gene is predicted to encode a Superfamily I DNA helicase, except that genome sequencing indicated that it has a one-base frameshift and would not encode a complete helicase. We have cloned the gene from two different D. radiodurans strains and find that the frameshift mutation is not present. The corrected gene encodes a 755 residue protein that is similar to the Bacillus subtilis YvgS protein and to helicase IV of Escherichia coli. The purified protein (helicase IV(Dr)) has ATP hydrolysis and DNA helicase activity. A truncated protein that lacks 214 residues from the N-terminus, which precede the conserved helicase domain, has greater ATPase activity than the full-length protein but has no detectable helicase activity. Disruption of locus DR1572 in the D. radiodurans chromosome causes greater sensitivity to hydrogen peroxide and methyl-methanesulfonate compared to wild-type cells, but no change in resistance to gamma and ultraviolet radiation and to mitomycin C. The results indicate that locus DR1572 encodes a complete protein that contributes to DNA metabolism in D. radiodurans.
journal_name
DNA Repair (Amst)journal_title
DNA repairauthors
Cao Z,Julin DAdoi
10.1016/j.dnarep.2008.12.011subject
Has Abstractpub_date
2009-05-01 00:00:00pages
612-9issue
5eissn
1568-7864issn
1568-7856pii
S1568-7864(08)00432-1journal_volume
8pub_type
杂志文章相关文献
DNA REPAIR文献大全abstract::The human RAD51 recombinase possesses DNA pairing and strand exchange activities that are essential for the error-free, homology-directed repair of DNA double-strand breaks. The recombination activities of RAD51 are activated upon its assembly into presynaptic filaments on single-stranded DNA at resected DSB ends. Def...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2017.10.008
更新日期:2017-12-01 00:00:00
abstract::DNA fiber fluorography is widely employed to study the kinetics of DNA replication, but the usefulness of this approach has been limited by the lack of freely-available automated analysis tools. Quantification of DNA fibers usually relies on manual examination of immunofluorescence microscopy images, which is laboriou...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2019.01.003
更新日期:2019-02-01 00:00:00
abstract::DNA replication is a prerequisite for cell proliferation, yet it can be increasingly challenging for a eukaryotic cell to faithfully duplicate its genome as its size and complexity expands. Dormant origins now emerge as a key component for cells to successfully accomplish such a demanding but essential task. In this p...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2017.06.019
更新日期:2017-08-01 00:00:00
abstract::Quantitating relative (32)P-band intensity in gels is desired, e.g., to study primer-extension kinetics of DNA polymerases (DNAPs). Following imaging, multiple (32)P-bands are often present in lanes. Though individual bands appear by eye to be simple and well-resolved, scanning reveals they are actually skewed-Gaussia...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2014.10.001
更新日期:2015-01-01 00:00:00
abstract::The mechanism and determinants of RecA mediated initial alignment of homologous DNA molecules were studied by performing Monte Carlo simulations of the dynamics of DNA molecules. The simulation procedure was used to assess the effect of heterologous DNA and dilution on the rate of formation and yield of homologous ali...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2003.09.009
更新日期:2004-01-05 00:00:00
abstract::3-Nitrobenzanthrone (3-NBA) is a highly mutagenic compound and possible human carcinogen found in diesel exhaust. 3-NBA forms bulky DNA adducts following metabolic activation and induces predominantly G:CT:A transversions in a variety of experimental systems. Here we investigated the influence of nucleotide excision r...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2015.11.004
更新日期:2016-03-01 00:00:00
abstract::Lagging strand DNA replication requires the concerted actions of DNA polymerase δ, Fen1 and DNA ligase I for the removal of the RNA/DNA primers before ligation of Okazaki fragments. To better understand this process in human cells, we have reconstituted Okazaki fragment processing by the short flap pathway in vitro wi...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2013.08.008
更新日期:2013-11-01 00:00:00
abstract::To investigate involvement of DNA mismatch repair in the response to short-wave ultraviolet (UVC) light, we compared UVC-induced mutant frequencies and mutational spectra at the Hprt gene between wild type and mismatch-repair-deficient mouse embryonic stem (ES) cells. Whereas mismatch repair gene status did not signif...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2006.06.005
更新日期:2006-11-08 00:00:00
abstract::In male germ cells the repair of DNA double strand breaks (DSBs) differs from that described for somatic cell lines. Irradiation induced immunofluorescent foci (IRIF's) signifying a double strand DNA breaks, were followed in spermatogenic cells up to 16 h after the insult. Foci were characterised for Mdc1, 53BP1 and R...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.02.011
更新日期:2007-09-01 00:00:00
abstract::The mechanisms that allow to circumvent replicative stress, and to resume DNA synthesis are poorly understood in Bacillus subtilis. To study the role of the diadenylate cyclase DisA and branch migration translocase (BMT) RadA/Sms in restarting a stalled replication fork, we nicked and broke the circular chromosome of ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2017.09.006
更新日期:2017-11-01 00:00:00
abstract::As haematopoietic stem cell gene therapy utilizing O(6)-methylguanine-DNA-methyltransferase has reached the clinical stage, safety-related questions become increasingly important. These issues concern insertional mutagenesis of viral vectors, the acute toxicity of pre-transplant conditioning protocols and in vivo sele...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.03.021
更新日期:2007-08-01 00:00:00
abstract::Humans have five members of the well conserved RecQ helicase family: RecQ1, Bloom syndrome protein (BLM), Werner syndrome protein (WRN), RecQ4, and RecQ5, which are all known for their roles in maintaining genome stability. BLM, WRN, and RecQ4 are associated with premature aging and cancer predisposition. Of the three...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2010.04.003
更新日期:2010-07-01 00:00:00
abstract::Gene amplification, a key mechanism for oncogene activation and drug resistance in tumour cells, involves the generation and joining of DNA double-strand breaks. Amplified DNA can be carried either on intra-chromosomal arrays or on extra-chromosomal elements (double minutes). We previously showed that, in rodent cells...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.08.015
更新日期:2009-01-01 00:00:00
abstract::Double-strand breaks in genomic DNA (DSB) are potentially lethal lesions which separate parts of chromosome arms from their centromeres. Repair of DSB by recombination can generate mutations and further chromosomal rearrangements, making the regulation of recombination and the choice of recombination pathways of the h...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2011.04.002
更新日期:2011-06-10 00:00:00
abstract::The repair of DNA double strand breaks is essential for cell survival and several conserved pathways have evolved to ensure their rapid and efficient repair. The non-homologous end joining pathway is initiated when Ku binds to the DNA break site. Ku is an abundant nuclear heterodimer of Ku70 and Ku80 with a toroidal s...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2014.02.019
更新日期:2014-05-01 00:00:00
abstract::AA8 Chinese hamster ovary cells were treated with halogenated nucleosides analogues of thymidine, namely CldU, 5-iodo-2'-deoxyuridine (IdU), and 5-bromo-2'-deoxyuridine (BrdU), following different experimental protocols. The purpose was to see whether incorporation of exogenous pyrimidine analogues into DNA could inte...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/s1568-7864(03)00044-2
更新日期:2003-06-11 00:00:00
abstract::If unrepaired, damage to genomic DNA can cause mutations and/or be cytotoxic. Single base lesions are repaired via the base excision repair (BER) pathway. The first step in BER is the recognition and removal of the nucleobase lesion by a glycosylase enzyme. For example, human oxoguanine glycosylase 1 (hOGG1) is respon...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2017.08.010
更新日期:2017-11-01 00:00:00
abstract::AHNAK is a high molecular weight protein that is under-expressed in several radiosensitive neuroblastoma cell lines. Using immunoaffinity purification or purified proteins, we show that AHNAK interacts specifically with the DNA ligase IV-XRCC4 complex, a complex that functions in DNA non-homologous end-joining. Furthe...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2003.11.001
更新日期:2004-03-04 00:00:00
abstract::Apurinic/apyrimidinic endonuclease (AP endo, HAP1) recognizes abasic sites in ds DNA and makes a single nick in the backbone 5' to the abasic site. In this report we examine the roles of three conserved tyrosine residues in close proximity to the active site. We show that Tyr(128) and Tyr(269), which interact upstream...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2004.06.009
更新日期:2004-11-02 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::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::Proteins that act on DNA, or are in close proximity to it, can become inadvertently crosslinked to DNA and form highly toxic lesions, known as DNA-protein crosslinks (DPCs). DPCs are generated by different chemotherapeutics, environmental or endogenous sources of crosslinking agents, or by lesions on DNA that stall th...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2020.102924
更新日期:2020-10-01 00:00:00
abstract::The proposed mechanism for transcription coupled nucleotide excision repair (TCR) invokes RNA polymerase (RNAP) blocked at a DNA lesion as a signal to initiate repair. In Escherichia coli, TCR requires the interaction of RNAP with a transcription-repair coupling factor encoded by the mfd gene. The interaction between ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.04.002
更新日期:2007-10-01 00:00:00
abstract::We previously showed that Caenorhabditis elegans APN-1, the only metazoan apurinic/apyrimidinc (AP) endonuclease belonging to the endonuclease IV family, can functionally rescue the DNA repair defects of Saccharomyces cerevisiae mutants completely lacking AP endonuclease/3'-diesterase activities. While this complement...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.11.007
更新日期:2010-02-04 00:00:00
abstract::Mammalian cells possess multiple closely related SWI/SNF chromatin remodelling complexes. These complexes have been implicated in the cellular response to DNA double strand breaks (DSBs). Evidence suggests that SWI/SNF complexes contribute to successful repair via both the homologous recombination and non-homologous e...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2020.102919
更新日期:2020-09-01 00:00:00
abstract::The DNA damage response is a key factor in the maintenance of genome stability. As such, it is a central axis in sustaining cellular homeostasis in a variety of contexts: development, growth, differentiation, and maintenance of the normal life cycle of the cell. It is now clear that diverse mechanisms encompassing cel...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2008.03.005
更新日期:2008-07-01 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::Reactive oxygen species drive the oxidation of guanine to 8-oxoguanine (8oxoG), which threatens genome integrity. The repair of 8oxoG is carried out by base excision repair enzymes in Bacteria and Eukarya, however, little is known about archaeal 8oxoG repair. This study identifies a member of the Ogg-subfamily archaea...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2019.102767
更新日期:2020-02-01 00:00:00
abstract::SbcCD and other Mre11/Rad50 (MR) complexes are implicated in the metabolism of DNA ends. They cleave ends sealed by hairpin structures and have been postulated to play roles in removing protein bound to DNA termini. Here we provide direct evidence that the Escherichia coli MR complex (SbcCD) removes protein from a pro...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/s1568-7864(03)00063-6
更新日期:2003-07-16 00:00:00
abstract::Expansion of a CGG-repeat tract in the 5' UTR of FMR1 is responsible for the Fragile X-related disorders (FXDs), FXTAS, FXPOI and FXS. Previous work in a mouse model of these disorders has implicated proteins in the base excision and the mismatch repair (MMR) pathways in the expansion mechanism. However, the precise r...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2018.12.004
更新日期:2019-02-01 00:00:00