Plasmid Library
Plasmid Library - Related Videos
08:57
High-throughput Yeast Plasmid Overexpression Screen
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Cited by 12 •
2011
Here we describe a plasmid overexpression screen in Saccharomyces cerevisiae, using an arrayed plasmid library and a high-throughput yeast transformation protocol with a liquid handling robot.
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.
05:30
CRISPR-Based Modular Assembly for High-Throughput Construction of a UAS-cDNA/ORF Plasmid Library
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Cited by 1 •
2024
We present a protocol for CRISPR-based modular assembly (CRISPRmass), a method for high-throughput construction of UAS-cDNA/ORF plasmid library in Drosophila using publicly available cDNA/ORF resources. CRISPRmass can be applied to editing various plasmid libraries.
08:40
Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
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Cited by 1 •
2012
The Target ID Library is a plasmid-based, genome-wide collection of cloned cDNA used to identify miRNA targets. Here we demonstrate its use and application.
09:12
MISSION LentiPlex Pooled shRNA Library Screening in Mammalian Cells
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Cited by 11 •
2011
Here we use a human LentiPlex pooled library and traditional sequencing methods to identify gene targets promoting cell survival. We demonstrate how to set up and deconvolute a LentiPlex screen and validate the results.
FAQs
Vector backbones provide the compatible framework needed to carry inserted DNA fragments, while the fragments supply the sequence variation being preserved. Maintaining many recombinant plasmids together allows that variation to be amplified and analyzed rather than reduced to one genetic sequence. In immunology and infection studies, this diversity supports parallel examination of many antigens, pathogen genes, or host-interaction factors.
Selection helps maintain cells that contain library plasmids and supports recovery of distinct library members as separate colonies. Because each colony represents a different plasmid and sequence, selection preserves the connection between a genetic insert and the colony carrying it. This organization makes later screening and sequence analysis interpretable, especially when researchers compare many candidates.
Screening compares the effects or identities of individual library members to determine which inserted sequences produce a relevant outcome. Depending on the study, analysis can identify antigens, pathogen genes, or sequences that alter immune signaling. The result is a link between a specific plasmid sequence and a biological property that may guide further investigation.
Construction begins by inserting DNA fragments into compatible vector backbones. The recombinant plasmids are then introduced into host cells by transformation, and selection is used to maintain plasmid-containing cells. Resulting colonies provide separately recoverable library members for preservation, amplification, and analysis. This workflow establishes a collection in which genetic diversity can be examined systematically.
Researchers can use a plasmid library when they need to examine many candidate sequences for interactions relevant to immune recognition. Screening may reveal antigens or support antibody and receptor screening, allowing promising sequence candidates to be distinguished from less informative ones. In infection research, these findings can contribute to identifying vaccine targets or other biologically important molecules.
Screening can identify pathogen or host-related sequences associated with altered immune signaling or virulence. Such results help researchers connect genetic content with changes in the interaction between an infectious agent and its host. The identified sequences may then provide targets for studying disease mechanisms, evaluating antimicrobial strategies, or developing approaches focused on immune responses.