Abstract:
:Chk1 is a protein kinase that acts as a key signal transducer within the complex network responsible of the cellular response to different DNA damages. It is a conserved element along the eukaryotic kingdom, together with a second checkpoint kinase, called Chk2/Rad53. In fact, all organisms studied so far carried at least one copy of each kind of checkpoint kinase. Since the relative contribution to the DNA-damage response of each type of kinase varies from one organism to other, the current view about the roles of Chk1 and Chk2/Rad53 during DNA-damage response is one of mutual complementation and intimate cooperation. However, in this work it is reported that Ustilago maydis - a phytopathogenic fungus exhibiting extreme resistance to UV and ionizing radiation - have a single kinase belonging to the Chk1 family but strikingly no kinases related to Chk2/Rad53 family are apparent. The U. maydis Chk1 kinase is able to respond to different classes of DNA damages and its activity is required for the cellular adaptation to such damages. As other described components of the Chk1 family of kinases, U. maydis Chk1 is phosphorylated and translocated to nucleus in response to DNA-damage signals. Interestingly subtle differences in this response depending on the kind of DNA damage are apparent, suggesting that in U. maydis the sole Chk1 kinase recapitulates the roles that in other organisms are shared by Chk1 and the Chk2/Rad53 family of protein kinases.
journal_name
DNA Repair (Amst)journal_title
DNA repairauthors
Pérez-Martín Jdoi
10.1016/j.dnarep.2009.01.023subject
Has Abstractpub_date
2009-06-04 00:00:00pages
720-31issue
6eissn
1568-7864issn
1568-7856pii
S1568-7864(09)00045-7journal_volume
8pub_type
杂志文章相关文献
DNA REPAIR文献大全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::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::The ubiquitin-proteasome pathway plays an important role in DNA damage signaling and repair by facilitating the recruitment and activation of DNA repair factors and signaling proteins at sites of damaged chromatin. Proteasome activity is generally not thought to be required for activation of apical signaling kinases i...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.10.008
更新日期:2010-01-02 00:00:00
abstract::MutT enzymes prevent DNA damage by hydrolysis of 8-oxodGTP, an oxidized substrate for DNA synthesis and antimutagenic, anticarcinogenic, and antineurodegenerative functions of MutT enzymes are well established. MutT has been found in almost all kingdoms of life, including many bacterial species, yeasts, plants and mam...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2010.10.009
更新日期:2011-02-07 00:00:00
abstract::Neuronal protection induced by ischemic preconditioning has an important role in the reduction of stroke volume and attenuation of neuronal cell death. Ischemic injury is associated with increased oxidative DNA damage, and failure to efficiently repair these oxidatively damaged lesions results in the accumulation of m...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.02.027
更新日期:2007-09-01 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 DNA damage checkpoint is a surveillance mechanism activated by DNA lesions and devoted to the maintenance of genome stability. It is considered as a signal transduction cascade, involving a sensing step, the activation of a set of protein kinases and the transmission and amplification of the damage signal through ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2004.06.019
更新日期:2004-12-02 00:00:00
abstract::RECQL5 is one of the five human RecQ helicases, involved in the maintenance of genomic integrity. While much insight has been gained into the function of the Werner (WRN) and Bloom syndrome proteins (BLM), little is known about RECQL5. We have analyzed the recruitment and retention dynamics of RECQL5 at laser-induced ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2012.05.001
更新日期:2012-07-01 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::Proteins responsible for the integrity of the genome are often used targets in drug therapies against various diseases. The inhibitors of these proteins are also important to study the pathways in genome integrity maintenance. A prominent example is Ugi, a well known cross-species inhibitor protein of the enzyme uraci...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2015.03.005
更新日期:2015-06-01 00:00:00
abstract::Maintenance of DNA integrity is vital for all of the living organisms. Consequence of DNA damaging ranges from, introducing harmless synonymous mutations, to causing disease-associated mutations, genome instability, and cell death. A cell cycle protein cyclin D1 is an established cancer-driving protein. However, contr...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2016.04.011
更新日期:2016-06-01 00:00:00
abstract::Nonhomologous end joining (NHEJ) is the major pathway for the repair of DNA double strand breaks (DSBs) in human cells. NHEJ requires the catalytic subunit of the DNA-dependent protein kinase (DNA-PKcs), Ku70, Ku80, XRCC4, DNA ligase IV and Artemis, as well as DNA polymerases mu and lambda and polynucleotide kinase. R...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.06.015
更新日期:2008-10-01 00:00:00
abstract::The XPB DNA helicase, a subunit of the basal transcription factor TFIIH, is also involved in nucleotide excision repair (NER). We examined recruitment of NER proteins in XP-B cells from patients with mild or severe xeroderma pigmentosum (XP) having different XPB mutations using local UV-irradiation through filters wit...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2007.03.025
更新日期:2007-09-01 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::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::Transcription factor II H (TFIIH) is composed of core TFIIH and Cdk-activating kinase (CAK) complexes. Besides transcription, TFIIH also participates in nucleotide excision repair (NER), verifying DNA lesions through its helicase components XPB and XPD. The assembly state of TFIIH is known to be affected by truncation...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2012.09.003
更新日期:2012-12-01 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 Fanconi Anemia (FA) pathway encodes a DNA damage response activated by DNA damage-stalled replication forks. Current evidence suggests that the FA pathway initiates with DNA damage recognition by the FANCM complex (FANCM/FAAP24/MHF). However, genetic inactivation of FANCM in mouse and DT40 cells causes only a part...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2011.09.006
更新日期:2011-12-10 00:00:00
abstract::Double-strand breaks (DSBs) are among the most lethal DNA lesions, and a variety of pathways have evolved to manage their repair in a timely fashion. One such pathway is homologous recombination (HR), in which information from an undamaged donor site is used as a template for repair. Although many of the biochemical s...
journal_title:DNA repair
pub_type: 杂志文章,评审
doi:10.1016/j.dnarep.2017.06.012
更新日期:2017-08-01 00:00:00
abstract::The majority of the cells in the body, including stem cells, exist in a quiescent state, so it is in quiescent cells where most DNA damage occurs. It has been uncertain whether or not this damage is repaired or fixed into mutations during quiescence or if proliferation is required for both. Prior to the development of...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2004.02.010
更新日期:2004-07-02 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::Oxidative stress via redox reactions can regulate DNA repair pathways. The base excision repair (BER) enzyme apurinic/apyrimidinic endonuclease 1 (APE1) is a key player in the redox regulation of DNA repair. Environmental factors can alter the methylation of DNA repair genes, change their expression and thus modulate ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2014.03.011
更新日期:2014-06-01 00:00:00
abstract::Eukaryotic genomes are especially vulnerable to DNA damage during the S phase of the cell cycle, when chromosomes must be duplicated. The stability of DNA replication forks is critical to achieve faithful chromosome replication and is severely compromised when forks encounter DNA lesions. To maintain genome integrity,...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2008.06.014
更新日期:2008-10-01 00:00:00
abstract::Breast cancer is the most common and significant cancers in females regarding the loss of life quality. Similar to other cancers, one of the etiologic factors in breast cancer is DNA damage. A plethora of molecules are responsible for sensing DNA damage and mediating actions which lead to DNA repair, senescence, cell ...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2020.103032
更新日期:2020-12-17 00:00:00
abstract::Specialized DNA polymerases are required to bypass DNA damage lesions that would otherwise cause replication arrest and cell death. When operating on non-canonical templates, such as undamaged DNA or on non-cognate lesions, these polymerases exhibit considerably reduced fidelity, resulting in the generation of mutatio...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2005.01.005
更新日期:2005-05-02 00:00:00
abstract::Mice defective for the Polk gene, which encodes DNA polymerase kappa, are viable and do not manifest obvious phenotypes. The present studies document a spontaneous mutator phenotype in Polk(-/-) mice. The initial indication of enhanced spontaneous mutations in these mice came from the serendipitous observation of a po...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2009.09.003
更新日期:2009-12-03 00:00:00
abstract::DNA damage can be considered as a biomarker for toxicity and response to chemotherapy. It is not known whether the chemotherapy-induced genotoxicity is associated with malnutrition. In this pilot study, we assess genotoxicity by means of DNA damage in patients with lymph-node positive colorectal cancer (CRC) and explo...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2018.01.005
更新日期:2018-03-01 00:00:00
abstract::An important feature of poly(ADP-ribose) polymerases (PARPs) is their ability to readily undergo automodification upon activation. Although a growing number of substrates were found to be poly(ADP-ribosyl)ated, including histones and several DNA damage response factors, PARPs themselves are still considered as the mai...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2015.02.004
更新日期:2015-06-01 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::DNA mismatch repair is an evolutionarily conserved repair pathway that corrects replication errors. In most prokaryotes and all eukaryotes, the mismatch repair protein MutL is a sequence-unspecific endonuclease that nicks the newly synthesized strand and marks it for repair. Although the sequence of the endonuclease d...
journal_title:DNA repair
pub_type: 杂志文章
doi:10.1016/j.dnarep.2018.10.003
更新日期:2019-01-01 00:00:00