Plasmid Repair Analysis
Plasmid Repair Analysis - Related Videos
13:10
Analysis of DNA Double-strand Break (DSB) Repair in Mammalian Cells
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Cited by 116 •
2010
This article describes GFP-based fluorescence in vivo assays that separately quantify homologous recombination and nonhomologous end joining in mammalian cells.
08:16
Plasmid Purification
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2023
Plasmid purification is a technique used to isolate and purify plasmid DNA from genomic DNA, proteins, ribosomes, and the bacterial cell wall. A plasmid is a small, circular, double-stranded DNA that is used as a carrier of specific DNA molecules. When introduced into a host organism via transformation, a plasmid will be replicated, creating numerous copies of the DNA fragment under study. In this video, a step-by-step generalized procedure is described for how to perform plasmid purification.
07:43
Plasmid Stability Analysis with Open-Source Droplet Microfluidics
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2024
An accessible, open-source microfluidic workflow is presented for the parallelized analysis of plasmid retention in bacteria. By employing fluorescence microscopy to quantify plasmid presence in single-cell microcolonies within gel microdroplets, this method provides a precise, accessible, and scalable alternative to traditional plate counting.
02:25
Overview of DNA Repair
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2020
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage. Chemically...
01:28
Plasmids
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2025
Plasmids are extrachromosomal DNA molecules found in bacteria, archaea, and some eukaryotic microbes like yeast. These small, circular DNA structures typically contain fewer than 30 genes, although some may exist linearly. Plasmids vary in their number within a cell, known as copy number. Single-copy plasmids are present in one copy per cell and multi-copy plasmids are present in multiple copies, reaching over 100 copies per cell.Plasmids usually replicate independently of the chromosomal DNA...
FAQs
The lesion or engineered alteration determines which repair outcome can be observed. Damaged bases may be removed, DNA ends may be joined through recombination, or an intact template may supply copied information. Designing the plasmid around a defined change therefore helps connect a recovered sequence or structure with a particular class of repair activity, rather than treating all restoration as equivalent.
Comparing repair outcomes in different strains or under different conditions can indicate whether a pathway contributes to plasmid restoration. A higher recovery of corrected molecules suggests greater activity under that comparison, whereas altered mutation patterns or structural outcomes may indicate a change in repair fidelity or processing. The plasmid provides the same defined repair challenge across tested contexts.
Sequence analysis shows whether the intended information was restored and whether mutations remain, while structural analysis indicates how the plasmid or its DNA ends were processed. Considering both readouts prevents repair from being judged only by exact sequence recovery. Together, they help distinguish accurate restoration from alternative outcomes that preserve or alter plasmid structure.
A typical workflow uses a plasmid carrying a defined lesion or sequence alteration, introduces it into cells, and allows cellular processing to occur. Researchers then recover the plasmids and examine their restored sequence and structure. Organizing the experiment around a known starting alteration makes the final molecular outcome interpretable as evidence of repair processing.
Recovered plasmids can reveal more than whether a lesion was corrected. Their sequences can expose residual or newly introduced mutations, while structural examination can show how DNA ends or plasmid organization changed during processing. These readouts support analysis of repair fidelity and mutation patterns, allowing investigators to distinguish accurate restoration from repair that produces a different genetic product.
It supports questions about how cells respond to DNA damage, how recombination contributes to restoration, and how accurately repair preserves genetic information. The approach also informs genetic engineering and plasmid-based assay design because investigators can evaluate whether a chosen lesion or sequence alteration produces a clear, interpretable repair pattern. Its value lies in connecting molecular outcomes with pathway behavior.