Genome Protection
Genome Protection - Related Videos
08:31
Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Cited by 2 •
2013
Single Virus Genomics (SVG) is a method to isolate and amplify the genomes of single virons. Viral suspensions of a mixed assemblage are sorted using flow cytometry onto a microscope slide with discrete wells containing agarose, thereby capturing the virion and reducing genome shearing during downstream processing. Whole genome amplification is achieved using multiple displacement amplification (MDA) resulting in genomic material that is suitable for sequencing.
08:31
Genome Editing
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2023
A well-established technique for modifying specific sequences in the genome is gene targeting by homologous recombination, but this method can be laborious and only works in certain organisms. Recent advances have led to the development of “genome editing”, which works by inducing double-strand breaks in DNA using engineered nuclease enzymes guided to target genomic sites by either proteins or RNAs that recognize specific sequences. When a cell attempts to repair this damage, mutations can be...
09:16
Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
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Cited by 7 •
2015
Array CGH for the detection of genomic copy number variants has replaced G-banded karyotype analysis. This paper describes the technology and its application in a diagnostic service laboratory.
12:04
Mouse Genome Engineering Using Designer Nucleases
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Cited by 14 •
2014
Designer nucleases such as zinc finger nucleases (ZFNs) and transcription activator-like effector nucleases (TALENs) can be used to modify the genome of mouse preimplantation embryos by triggering both the nonhomologous end joining (NHEJ) and homologous recombination (HR) pathways. These advances enable the rapid generation of mice with precise genetic modifications.
11:59
Competitive Genomic Screens of Barcoded Yeast Libraries
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Cited by 44 •
2011
We have developed comprehensive, unbiased genome-wide screens to understand gene-drug and gene-environment interactions. Methods for screening these mutant collections are presented.
FAQs
Damage checkpoints act as control points that pause cell-cycle progression when DNA lesions or replication errors are detected. This interruption prevents a cell from advancing with damaged genetic material and creates an opportunity for repair pathways to act. If the damage cannot be adequately resolved, checkpoint responses can contribute to senescence or programmed cell death instead of allowing instability to persist.
Proofreading and mismatch repair address errors that arise during DNA replication, but they operate as distinct safeguards within genome protection. Proofreading helps limit mistakes as DNA is copied, whereas mismatch repair corrects replication errors that remain afterward. Together, these mechanisms reduce the chance that copying inaccuracies become permanent mutations and are transmitted to descendant cells.
Homologous recombination is one of the repair pathways activated during genome protection, particularly within the broader response to DNA damage such as strand breaks. Its importance lies in helping cells preserve chromosome integrity rather than simply tolerating lesions. When this safeguard fails or becomes insufficient, chromosome instability and the accumulation of genomic changes can increase.
Senescence and programmed cell death provide protective outcomes when DNA damage is too extensive for reliable repair. Senescence prevents the affected cell from continuing normal proliferation, while programmed cell death removes it altogether. These responses limit the propagation of unstable genetic material, helping protect tissue function and reducing the likelihood that harmful genomic changes will persist.
Research on genome protection can show how cells detect and respond to environmental stress that threatens DNA integrity. Investigators can examine the coordination of damage detection, cell-cycle pauses, repair, and cell-fate decisions to understand whether cells recover or become senescent or eliminated. This perspective connects molecular responses to broader questions about tissue stability, aging, and disease.
Accurate DNA maintenance is essential across biological contexts because cells must preserve genetic information as organisms develop, reproduce, and maintain tissues. Repair pathways and damage responses reduce mutations and chromosome instability that could disrupt these processes. Studying these safeguards therefore links cellular DNA maintenance with organism-level outcomes, including inherited disease risk and the continued function of tissues.
Genome protection provides a framework for investigating why genomic changes accumulate in cancer and how defects in DNA repair contribute to repair disorders. Researchers can also use this knowledge to explore targeted cancer therapies that exploit differences in damage responses. The same mechanisms help connect cellular repair failure with disease development, aging, and abnormal chromosome stability.