Related Experiment Video
Updated: Apr 7, 2026

14:26
Genome-wide Purification of Extrachromosomal Circular DNA from Eukaryotic Cells
Published on: April 4, 2016
26.1K
From structure to function of bacterial chromosomes: Evolutionary perspectives and ideas for new experiments
Marco Cosentino Lagomarsino1, Olivier Espéli2, Ivan Junier3
1Laboratory of Computational and Quantitative Biology, UPMC, CNRS UMR 7238, Paris, France.
FEBS Letters
|July 15, 2015
Summary
Understanding bacterial chromosome structure and function is difficult due to their dynamic nature. This study reviews methods like comparative genomics and experimental evolution to investigate bacterial chromosome organization and function.
Area of Science:
- Microbiology
- Genetics
- Molecular Biology
Background:
- Investigating the link between chromosome structure and function is challenging due to the dynamic and difficult-to-manipulate nature of chromosomes in vivo.
- Bacteria present a tractable model system for studying fundamental principles of chromosome organization.
Purpose of the Study:
- To explore promising approaches for understanding bacterial chromosome structure and function.
- To integrate knowledge from diverse sources, including experimental techniques, comparative genomics, and experimental evolution.
Main Methods:
- Overview of experimental tools: genetic, biochemical, and fluorescence microscopy techniques for bacterial chromosome description.
- Application of comparative genomics to identify functionally significant organizational features shared across diverse bacterial species.
- Discussion of future perspectives using experimental evolution for screening and selection based on chromosome structural properties.
Main Results:
- Experimental tools provide insights into bacterial chromosome structure.
- Comparative genomics can reveal functionally important organizational features.
- Experimental evolution offers novel avenues for future research.
Conclusions:
- A multi-faceted approach integrating various methodologies is crucial for deciphering bacterial chromosome structure-function relationships.
- Future research should leverage experimental evolution to directly link chromosome structure to cellular function in bacteria.
Related Concept Videos
Chromosome Structure
27.9K
A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
27.9K
Chromosome Structure
6.7K
6.7K
Nucleoid
1.8K
The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...
1.8K
Cytoskeletal Proteins in Bacteria
4.5K
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
4.5K
Synteny and Evolution
4.0K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
4.0K
Genomic DNA in Prokaryotes
50.7K
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.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
50.7K

