Mutant Strain Generation
Mutant Strain Generation - Related Videos
03:03
Phenotypic Comparison of Wild-Type and Mutant Strains of Streptomyces coelicolor
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2025
Source: Bennett, J. A., et al. Visual and Microscopic Evaluation of Streptomyces Developmental Mutants. J. Vis. Exp. (2018)This video demonstrates the cultivation and phenotypic comparison of wild-type and mutant Streptomyces coelicolor strains. It outlines procedures for minimizing spontaneous mutations, preventing cross-contamination, and promoting bacterial growth through proper plating techniques. Finally, the video highlights visual differences in colony morphology to illustrate the...
11:45
Generation of Marked and Markerless Mutants in Model Cyanobacterial Species
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Cited by 36 •
2016
Introducing multiple genomic alterations into cyanobacteria is an essential tool in the development of strains for industrial and basic research purposes. We describe a system for generating unmarked mutants in the model cyanobacterial species Synechocystis sp. PCC6803 and marked mutants in Synechococcus sp. PCC7002.
09:17
Generation of Maternal Mutants Using zpc:cas9 Knock-in Zebrafish
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2025
Here, we describe a protocol for generating maternal mutant that couples a stable zpc:cas9 knock-in line with Tol2-mediated delivery of sgRNA expression cassettes.
04:14
Generation of Antibiotic-Marked Mutants in Cyanobacteria via Homologous Recombination
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2025
Source: Lea-Smith, D. J., et al. Generation of Marked and Markerless Mutants in Model Cyanobacterial Species. J. Vis. Exp. (2016)The video demonstrates a method for generating antibiotic-marked mutants in cyanobacteria. The protocol begins with culturing cyanobacteria, followed by centrifugation and washing steps that preserve surface pili. A plasmid carrying an antibiotic resistance gene flanked by homologous sequences is then introduced. During incubation, the plasmid is internalized via pili...
03:04
Generation of a Fluorescent Reporter Strain in Pseudomonas aeruginosa
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2025
Source: Rugjee, K. N. et. al., Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa. J. Vis. Exp. (2016)This video demonstrates the generation of a cyclic-di-GMP-responsive reporter strain in Pseudomonas aeruginosa using electroporation. Successful transformation is confirmed through antibiotic selection and fluorescence-based...
FAQs
Mutant strain generation can use targeted gene modification or random mutagenesis depending on the research question. Targeted approaches examine the effect of an intended genetic change, whereas random mutagenesis produces candidates whose alterations must be identified and evaluated. This distinction determines whether the workflow begins with a defined hypothesis or a broader search for informative phenotypes.
A DNA change alone does not establish how the organism behaves. Genotype confirmation shows whether the intended alteration is present, while phenotype confirmation assesses its observable consequence, such as altered growth, metabolism, development, or resistance. Considering both provides the evidence needed to connect a genetic change with biological function.
Transfer provides a route for placing an altered sequence into an organism for evaluation. Its value lies in creating a strain in which the introduced genetic material can be related to observable characteristics. This supports experiments that test gene function, pathway behavior, or useful biological traits, linking sequence-level changes with measurable biological outcomes.
A typical workflow selects a genetic strategy, introduces or produces variation, isolates candidate strains, and confirms both genotype and phenotype. Isolation separates individual candidates for assessment, while confirmation distinguishes strains carrying the relevant genetic change from those that do not show the intended biological outcome. The sequence supports controlled interpretation of experimental results.
Researchers compare the confirmed genetic alteration with the strain’s observable characteristics. Changes in growth, metabolism, development, or resistance can indicate that the modified gene affects a related biological process, while genotype and phenotype results together provide a stronger basis for functional conclusions than either type of observation alone.
These strains support functional genomics by testing gene roles, disease modeling by providing altered biological systems, and microbial biotechnology by examining useful traits. They also help investigate heredity because researchers can relate genetic material to observable characteristics in a controlled system. The same approach connects molecular changes with broader biological outcomes.