Bacterial Genetics
Bacterial Genetics - Related Videos
03:01
Detection of Target Enzyme Expression in Genetically Modified Bacterial Cells
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2025
Source: Kim, H. et. al., Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System. J. Vis. Exp. (2016)This video demonstrates a genetic screening method to detect enzyme expression using metagenomic fosmid libraries and chromogenic substrates. Flow cytometry identifies and isolates single cells producing colored products, enabling high-throughput selection of active enzyme-expressing cells.
14:06
Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
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Cited by 9 •
2012
Systematic, large-scale synthetic genetic (gene-gene or epistasis) interaction screens can be used to explore genetic redundancy and pathway cross-talk. Here, we describe a high-throughput quantitative synthetic genetic array screening technology, termed eSGA that we developed for elucidating epistatic relationships and exploring genetic interaction networks in Escherichia coli.
09:03
Forward Genetic Approaches in Chlamydia trachomatis
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Cited by 21 •
2013
We describe a methodology to perform genetic analysis in Chlamydia based on chemical mutagenesis and whole genome sequencing. In addition, a system for DNA exchange within infected cells is described that can be used for genetic mapping. This method may be broadly applicable to microbial systems lacking transformation systems and molecular genetic tools.
05:01
Agrobacterium-Mediated Genetic Transformation: A Method to Genetically Transform the Rice Genome via Genetically Engineered Agrobacterium tumefaciens
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2025
In this video, we demonstrate genetic transformation of the rice genome using an Agrobacterium tumefaciens binary vector. This bacterium facilitates the transfer of a foreign DNA plasmid using Agrobacterium virulence proteins.
08:50
Genetic Screens
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2023
Genetic screens are critical tools for defining gene function and understanding gene interactions. Screens typically involve mutating genes and then assessing the affected organisms for phenotypes of interest. The process can be “forward”, where mutations are generated randomly to identify unknown genes responsible for the phenotypes, or it can be “reverse”, where specific genes are targeted for mutation to observe what phenotypes are produced.Here, JoVE reviews various types of genetic...
FAQs
The chromosome and plasmids can contribute differently to bacterial traits. The chromosome provides the primary hereditary framework, whereas plasmids represent additional genetic material that may carry information affecting properties such as metabolism, virulence, or antibiotic resistance. Considering both sources prevents researchers from attributing every inherited characteristic to the chromosome and helps clarify how bacterial cells maintain diverse capabilities.
Mutations and gene transfer change bacterial genetics through different routes. A mutation alters a DNA sequence within a cell's existing genetic information. Transformation, transduction, and conjugation instead transfer genes between cells. This distinction helps researchers determine whether a changed trait arose from an internal sequence change or from acquired information, an important interpretation when studying resistance, metabolism, or virulence.
These terms identify distinct gene-transfer processes, even though the overview does not reduce them to a single route. Treating them separately allows investigators to organize how hereditary information moves between bacterial cells and to compare that movement with mutation, which changes DNA within existing information. The distinction is useful when interpreting newly acquired traits in experimental or disease-related studies.
Rapid response follows from the combined effects of DNA mutation and gene transfer. Mutations create altered DNA sequences, while transformation, transduction, and conjugation can move genes between cells. Together, these processes expand the genetic changes available within a population, helping explain how traits connected with metabolism, virulence, or antibiotic resistance can shift as environmental conditions change.
Researchers can use bacterial genetics to connect changes in hereditary information with antibiotic resistance. They can consider whether a trait reflects a DNA mutation or genes transferred between cells, then examine how that trait changes within bacterial populations under environmental pressures. This framework supports investigations of resistance development and helps place resistance within broader studies of microbial evolution.
By linking DNA information to observable bacterial traits, bacterial genetics provides a basis for laboratory methods that analyze gene function. It also supports genetic engineering, where understanding hereditary information and its transmission is relevant to developing or studying altered biological capabilities. These applications connect basic questions about bacterial inheritance with practical biotechnology and investigations of metabolism, virulence, and resistance.