Mutant Isolation Protocol
Mutant Isolation Protocol - Related Videos
14:56
A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants
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Cited by 18 •
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Forward genetics is a powerful method to unravel the molecular level of how Toxoplasma egresses from its host cell. Protocols are provided to chemically mutagenize parasites, enrich for mutants with defects in induced egress, and validate the phenotype of cloned mutants.
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High-Throughput Robotically Assisted Isolation of Temperature-sensitive Lethal Mutants in Chlamydomonas reinhardtii
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Temperature-sensitive (ts) lethal mutants are valuable tools to identify and analyze essential functions. Here we describe methods to generate and classify ts lethal mutants in high throughput.
07:12
Neutrophil Isolation Protocol
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Cited by 173 •
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Neutrophils are among the first cells to arrive on the site of inflammatory immune response, and their functions and mechanisms have been studied extensively in vitro. We demonstrate a standard density gradient separation method to isolate human neutrophils from whole blood using commercially available separation media.
06:27
A Protocol for Explant Cultures of IDH1-mutant Diffuse Low-grade Gliomas
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Cited by 4 •
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IDH1-mutant diffuse low-grade gliomas are rare tumors that are difficult to culture. We introduce a simple, non-enzymatic explant method that preserves IDH1-mutant protein expression and sustains cultures for months. Importantly, this technique works with cryopreserved tumors, offering a valuable resource for glioma research.
02:44
Isolating Interaction-Null/Impaired Mutants Using the Yeast Two-Hybrid Assay
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2023
The interactions of biomolecules, such as protein-protein interactions, are the molecular basis of biological functions. If interaction-null/impaired mutants that specifically lack the relevant interaction can be isolated, they will greatly help to understand the function(s) of this interaction. This article presents an efficient way to isolate interaction-null/impaired mutants.
FAQs
Selection or screening provides the decision point for identifying candidates with a defined phenotype. The protocol must connect the chosen criterion to the biological trait under investigation, while consistent growth conditions help ensure that observed differences reflect genetic variation rather than environmental effects. This distinction supports more reliable recovery of candidates for later propagation and genetic confirmation.
A candidate must retain the relevant alteration and phenotype through propagation to demonstrate that the finding is heritable. Genetic confirmation then helps distinguish a stable mutant from a temporary or environmentally induced difference. Establishing inheritance strengthens the connection between the DNA alteration and the observable trait, making the candidate more suitable for downstream genetic and phenotypic analysis.
Growth conditions can influence whether a defined phenotype appears, so they must be controlled consistently during identification and follow-up. Appropriate controls provide a reference for distinguishing mutant-associated traits from normal variation or condition-dependent effects. Together, these measures improve the reliability of candidate recovery and make comparisons between candidate mutants and other organisms or cells more interpretable.
A typical workflow begins with mutagenesis or an existing variant population, followed by selection or screening for the phenotype of interest. Candidate organisms or cells are then recovered and propagated under controlled conditions. The final stages establish whether the trait is inherited and confirm the genetic status of candidates before molecular or phenotypic studies proceed.
Researchers use this approach when they need to connect altered DNA with an observable trait, investigate gene function, or examine a biological pathway. It can also generate experimental models that carry useful heritable changes. The resulting candidates provide material for further genetic confirmation and for analyses designed to relate phenotype, inheritance, and pathway behavior.
Validated mutants can reveal whether a heritable DNA alteration is associated with a particular phenotype and can help clarify gene function. They also support downstream molecular and phenotypic analyses, allowing researchers to examine the altered trait in a defined experimental model. Careful confirmation is essential because interpretation depends on linking the candidate genotype with the observed outcome.