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Genomic DNA in Prokaryotes

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
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Conservative Site-specific Recombination and Phase Variation

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...

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Generation of Genomic Deletions in Mammalian Cell Lines via CRISPR/Cas9

Generation of Genomic Deletions in Mammalian Cell Lines via CRISPR/Cas9

Published on: January 3, 2015

Random genome deletion methods applicable to prokaryotes.

Nobuaki Suzuki¹, Masayuki Inui, Hideaki Yukawa

¹Microbiology Research Group, Research Institute of Innovative Technology for the Earth (RITE), Kizugawa, Kyoto, Japan.

Applied Microbiology and Biotechnology

|May 21, 2008

Summary

This summary is machine-generated.

Large-segment genome deletion methods help tailor microbial genomes by identifying non-essential genes. Advances in random deletion techniques using transposons streamline this process for prokaryotes.

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Area of Science:

Microbiology
Genomics
Molecular Biology

Background:

Microbial genome minimization is crucial for tailored functions.
Identifying essential genes for targeted deletion remains challenging due to incomplete knowledge and scattered gene distribution.

Purpose of the Study:

To review technological advancements in large-segment random genome deletion methods in prokaryotes.
To assess current approaches for identifying non-essential genes and minimizing microbial genomes.

Main Methods:

Utilizing transposon-based random genome deletion methods.
Analyzing deletion strains to identify non-essential genes.
Reviewing existing literature on genome deletion technologies.

Main Results:

Random genome deletion methods, particularly those using transposons, simplify the identification of non-essential genes.
These methods facilitate the generation of random deletion strains for analysis.
Progress is being made in understanding minimum genome content for cell survival.

Conclusions:

Technological advancements in random genome deletion are improving microbial genome tailoring.
Further research into gene essentiality and genome function is essential.
These methods contribute to understanding genome evolution and function.