Articles tagged with Dna Replication
Researchers have modelled a key mechanism by which DNA replicates, revealing details about how helicases wrangle DNA during replication. The simulations showed each step of translocation can travel more than 12 nucleotides along the backbone, pinpointing interactions involved in long-distance movement.
SLFN11 acts as a surveillance factor for protein homeostasis by alleviating proteotoxic stress derived from protein synthesis and maturation. Its lack makes cells vulnerable to anticancer drugs inducing ER and proteotoxic stress, leading to chemoresistance. SLFN11 is also involved in regulating immune response and inflammation.
Researchers have discovered the mechanism behind enzyme Polα-primase and protein CST's interaction at the ends of chromosomes. The findings reveal an unprecedented role for CST in facilitating Polα-primase activity, shedding light on telomere replication and cell division.
Researchers have developed a novel COVID-19 vaccine based on altered plasmid DNA that effectively blocks cell infection across all tested variants. The vaccine targets a specific vulnerability in the SARS-CoV-2 virus's spike protein, inducing a focused antibody response.
A recent study published in Aging-US reveals the crucial role of WRN in making choices between classical and alternative non-homologous end joining (NHEJ) DNA repair pathways. The research provides new insights into progeroid syndromes, such as Werner syndrome, and their connection to aging.
Researchers at Medical University of South Carolina found that blocking the enzyme polymerase reduces the virus's ability to multiply. This discovery exposes an Achilles' heel that could be targeted with a therapeutic. Polymerase is a key tool for DNA replication and repair, making the virus vulnerable to disruption.
A study by Rice University bioscientists has revealed the presence of a central metal ion critical to DNA replication and implicated in misincorporation. The research found that three metal ions are involved in the process, with the first supporting nucleotide binding and the second stabilizing the binding of loose nucleotides. This di...
Scientists at Van Andel Institute and Rockefeller University have revealed the structure of the 911 DNA checkpoint clamp, which loads onto DNA to repair damage. The novel finding shows that the 911 clamp is loaded onto DNA from the opposite end, a surprise in the field of DNA replication.
Researchers at Helmholtz Munich have discovered that slowing down DNA replication speed improves reprogramming efficiency of cells into totipotent cells. This breakthrough could be a major advancement for stem cell therapy and regenerative medicine approaches.
A team of scientists has discovered that the enzyme DNA topoisomerase VI plays a critical role in removing chromosome tangles in plants, which may lead to new antimalarial drug targets. The study provides unprecedented insight into the mechanism of action of this enzyme and its potential applications in plant breeding.
Researchers found that DNA polymerases derived from E. coli are more prone to errors under microgravity, increasing the mutation rate and potentially leading to cancer. The study's results highlight the importance of designing rotating spaceships with artificial gravity to prevent negative effects on astronauts' health.
Cryo-EM study reveals details of DNA repair mechanism translesion synthesis (TLS), allowing cells to survive with mutations. Key protein complex Pol K - PCNA interaction modulated by ubiquitination facilitates recruitment of TLS polymerase to damage sites.
Scientists successfully induce gene expression from a synthetic DNA and evolution through continuous replication using cell-free materials. They also improve the DNA to increase its replication efficiency by up to 10-fold in just 60 days.
Researchers discovered a DNA modification system that coordinates bacterial replication in TB. The DarT/DarG system can be targeted by new antibiotics, offering hope for treating the deadly disease.
Yang Gao's lab has received a $1.9 million NIH grant to investigate the mechanisms of proteins that produce copies of genomic DNA, with potential implications for cancer treatment. The research aims to understand how DNA replication and repair processes can be targeted to develop new therapies.
Researchers have developed a new method to measure DNA torsional stiffness, which can impact how cells work. The technique provides insights into the biological implications of twist-induced phase transitions in DNA.
The study shows that the CTD and OD domains of mtp53 R273H play key roles in mutant p53 GOF, pertaining to processes associated with DNA replication. The authors investigated the role of these domains in cell proliferation, DNA replication, and cell cycle progression in breast cancer cells.
A study by Nagoya University researchers reveals that cohesin's ring needs to open for certain processes, like DNA replication and chromosome segregation. This opening facilitates the progressive replication of the DNA double helix and allows DNA looping, crucial for regulating gene expression.
A recent study published in Molecular Biology and Evolution reveals that the DNA replication machinery of Mimivirus, a giant virus, is ancient and evolved over time. The research suggests that Mimiviral genes related to DNA replication are subject to purifying selection, indicating their essential role in the organism's survival.
A new study reveals that cyanobacteria rely on a circadian clock to precisely time DNA replication. Disruptions to this rhythm can lead to unfinished chromosomes and potential health problems. The findings have implications for understanding the impact of interrupted circadian rhythms on human health.
Researchers have identified a critical role for DNA replication timing in controlling the packing of DNA with its regulatory factors, known as the epigenome. The study found that disrupting this program can lead to inappropriate cellular functions and negative health outcomes.
An international study reveals that the MutS protein, known as the guardian of our genome, coordinates the essential DNA repair process from beginning to end. The researchers used cryo-electron microscopy to visualize the protein and describe its mechanism of action.
Researchers at Cold Spring Harbor Laboratory have discovered how human cells assemble and disassemble Origin Recognition Complexes to initiate DNA replication. The study reveals a specific interaction between ORC1 protein and CDC6, allowing them to work together in a coordinated manner.
Researchers have discovered a 19-amino acid insertion helix in the Orc4 subunit of yeast ORC that enables human-like DNA binding, transforming yeast into a humanized ORC. This finding provides new insights for cancer therapy and human development, including potential targets for anti-cancer drug screening.
Researchers describe for the first time the full sequence of Biologist-induced replication (BIR) and found it stalls at roadblocks when transcription is introduced near the beginning. This discovery suggests that BIR's high risk-reward arrangement may contribute to genomic instability leading to cancer development.
Researchers at Arizona State University have discovered that certain molecules can promote the self-assembly of sliding clamps into structures containing many stacked doughnut shapes, resembling tubes of doughnuts. These findings suggest a new mechanism by which cells may control DNA replication under stress conditions.
Researchers from the University of Copenhagen have discovered how MCM proteins regulate DNA replication pace and preserve essential skill for life continuation in cells. Their findings suggest a potential way to exploit cancer weaknesses by manipulating molecular roadblocks that slow down DNA replication.
Researchers used a genome database to identify the cell type from which cancers derive, revealing new insights into cancer development. By comparing cancer cells to normal human cells, they found that different cancers mostly closely matched specific cell types, shedding light on their origins and tumor behavior.
Research from NC State University reveals how MutL and MutS proteins create an immobile structure to prevent replication errors, reducing errors by a thousand-fold. The complex also prevents mismatched regions from being packed back into the cell during division.
Researchers found that a gene's checkpoint mechanism can sometimes allow cells to divide abnormally, leading to worse damage. This discovery has important implications for treating cancer and understanding the inner workings of cells.
Researchers visualize DNA replication in single human cells, revealing a non-random selection mechanism for replication activation on CTCF-organized chromatin structures. The study provides critical insights into the role of local epigenetic environment in coordinating genome duplication.
Researchers at NUI Galway have discovered a key role for CDC7 in cancer cell replication, providing new insights into developing novel treatments. The study found that blocking CDC7 could be an effective strategy for treating aggressive cancers like pancreatic and colon cancer.
An international team studied the Pol δ-DNA-PCNA complex to understand DNA replication and how it can malfunction. The team found that PCNA acts as a platform for different processing enzymes, similar to a toolbelt with an array of tools.
DNA repair mechanisms choose between pathways to limit harmful chromosomal combinations that may be predisposed to cancer and genetic diseases. The study found Rad52-dependent single-strand annealing leads to gross chromosomal rearrangements at centromeres, while Rad51 promotes conservative non-crossover recombination.
Cancer cells rely on different factors for survival when DNA replication is blocked. Researchers found that inhibiting a key protein called Cdc7 selectively kills cancer cells by inactivating their safety mechanism. This discovery provides a new strategy for targeting cancer cells and developing anti-cancer agents.
Scientists have identified a molecular mechanism that could reverse the genetic defect responsible for Friedreich's ataxia by enhancing a natural process that contracts repetitive DNA sequences in living tissue. This contraction occurs during DNA replication and is triggered by the formation of an unusual triple-helical DNA structure.
The study found that H2A.Z promotes H4K20me2 deposition, recruiting ORC1 to license and activate early DNA replication origins. H2A.Z-regulated origins have higher firing efficiency and earlier replication timing compared to other origins.
ATAD5 plays a crucial role in counteracting DNA replication stress by regulating PCNA unloading and promoting RAD51 recruitment. This study reveals ATAD5's fundamental mechanism of replication stress control, contributing to the development of cancer therapy.
Two research teams deciphered how RNase H2 and RNase H1 are coordinated to remove RNA-DNA hybrid structures from chromosomes. The study found that RNase H2 primarily acts during the G2 phase after DNA replication, while RNase H1 can act in all phases of the cell cycle.
Researchers created a mutated form of DNA repair protein RAD51 to study its critical functions at stalled replication forks. The study found that RAD51's strand exchange activity is not required for fork regression, but is crucial for restarting replication once the obstacle has been removed.
Researchers found that intrinsic mechanical properties of chromatin determine how fibers entwine during DNA replication, preventing tangles and ensuring proper segregation. The study highlights the importance of physical principles in biological processes and provides new insights into chromatin behavior.
Researchers at LMU Munich propose a direct mechanism for synthesizing DNA subunits from organic compounds in a prebiotic environment. This process could have given rise to DNA strands on early Earth, potentially 4 billion years ago.
A novel molecular mechanism for regulating PCNA cycling during DNA replication has been discovered. The ATAD5-RFC-Like-Complex (ATAD5-RLC) is a PCNA unloader that opens the PCNA ring to remove it from DNA.
Researchers have established a novel method to study DNA replication in individual cells, allowing them to gain insights into the mechanisms that maintain genomic DNA stability. The 'scRepli-seq' method revealed that genome replication profiles were highly conserved among cells and reflected the organization of chromatin compartments.
A new study led by Grant Brown suggests that at times of stress, DNA replication errors are far more frequent than previously appreciated. This could lead to increased mutations in human cells, potentially contributing to cancer and other diseases.
Scientists have discovered two methods to mend DNA-protein crosslinks and established how DNA replication triggers these repair processes. The researchers hope their findings can be used to develop more efficient combination treatments for cancer cells.
Researchers have identified specific points along the DNA molecule that control replication, shedding light on a decades-old mystery. This discovery could lead to breakthroughs in understanding genetic diseases where replication timing is disrupted.
Researchers found that vorinostat effectively inhibited HPV DNA amplification and virus production in preclinical experiments. Additionally, the treatment induced programmed cell death in infected cells. The study suggests that HDAC inhibitors could be promising compounds for treating benign HPV infections.
Researchers have discovered how DNA gyrase, a molecular machine in bacterial cells, prevents twists in DNA that can stop replication and kill the cell. This knowledge can lead to the design of new targeted antibiotics to combat antibiotic-resistant bacteria.
Researchers discovered that loss of tumor protein p53 promotes cancer development by allowing cells to replicate despite growth stimuli deficiencies. This discovery provides insight into how cancer cells survive and multiply in adverse conditions.
The study reveals that the WD40 repeats in AND-1 prevent nascent DNA cleavage by a nuclease, allowing for successful cell division. The discovery highlights the crucial function of AND-1 in protecting replicated DNA from degradation during replication and cell proliferation.
Researchers found liver cells do not need ORC1 to replicate DNA, a key component of cell division. This process, called an endocycle, allows cells to copy their DNA multiple times without dividing, resulting in larger cells with more DNA. Understanding this mechanism could help explain how cancer arises and how it spreads.
The team found that telomeres are regulated by proteins, including Taz1, which tether internal regions to the telomeres. This process ensures faithful duplication of genetic material. Better understanding of this mechanism may inform research into maintaining genetic information and preventing diseases.
Researchers identify TLK1 and TLK2 as critical for accurate DNA replication, preventing extensive damage and cell death. The study found that these enzymes are rarely mutated in cancers but their high expression correlates with poor patient outcomes.
Researchers at Indiana University have identified 'hotspots' in DNA where genetic mutations are significantly elevated, including areas with repeated chemical letters and specific patterns of three letters. This study provides a roadmap for identifying similar trouble spots in human DNA.
Researchers have determined the atomic structure of the Origin Recognition Complex (ORC) bound to DNA, revealing its role in selecting replication origins. The study reveals that ORC selects DNA sites based on their unique structure rather than specific base sequences.
Researchers at Saint Louis University have uncovered new answers about why cells rapidly age in children with a rare disease called Hutchinson-Gilford Progeria Syndrome. The team found that cellular replication stress and a mistaken innate immune response are culprits, and successfully blocked these processes with vitamin D.
A recent study by George Mason University researchers found that women who have given birth have shorter telomeres compared to childless women. The study suggests a link between having children and increased telomere shortening, which may be associated with higher morbidity and mortality rates.
Mutated Cyclin E and Myc genes induce premature DNA replication, leading to molecular collisions and new mutations. The study identified a method to map replication origins on all chromosomes, revealing that aberrant sites can cause genomic instability in cancers.
Researchers have discovered a molecular commonality between two progeroid syndromes and introduced a method for disease recognition that could lead to breakthroughs in therapy. By characterizing disruptions in DNA replication timing, the team identified a shared abnormality in the gene TP63.