Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Transduction01:16

Transduction

Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
Operon Model01:23

Operon Model

The operon model represents a fundamental mechanism of gene regulation in prokaryotes, enabling coordinated expression of genes involved in related metabolic or functional pathways. Operons consist of structural genes, a promoter, and an operator, with transcription regulated by repressors, activators, and small effector molecules.Structure and Function of OperonsAn operon is a cluster of structural genes transcribed together under the control of a single promoter. The promoter region...
Repressible Operon: trp Operon01:21

Repressible Operon: trp Operon

The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
Transformation01:26

Transformation

Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
Coordination of Gene Expression Processes in Bacteria01:29

Coordination of Gene Expression Processes in Bacteria

The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

DNA/Cell Mass Homeostasis: Coordinating DNA Replication and Cell Size with Central Carbon Metabolism During Bacterial Growth.

Genes·2026
Same author

The chromosomal origin of replication as the basis for the spatio-temporal biology of bacteria.

Frontiers in microbiology·2026
Same author

60 Years of Studies into the Initiation of Chromosome Replication in Bacteria.

Biomolecules·2025
Same author

Targeting T cells with tetravalent bispecific antibodies for the treatment of graft-versus-host disease.

Blood advances·2024
Same author

DNA Damage, Genome Stability, and Adaptation: A Question of Chance or Necessity?

Genes·2024
Same author

Delayed Onset of Symptoms After a Rattlesnake Bite in a Renal Transplant Patient: A Case Report.

Clinical practice and cases in emergency medicine·2024
Same journal

AI in Genomics: From Variant Calling to Multi-Omics Integration.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
Same journal

Rethinking One Health: Microbial Foundations for Ecological Governance.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
Same journal

Biobanked Liver Organoids: A Roadmap for Precision Hepatology.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
Same journal

The Temporal Architecture of Human Cells: Organelle Clocks and Distributed Circadian Time.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
Same journal

Opposing Activity at the Apical Surface: An Antagonistic Collaboration Between Crumbs and Myosin II Determines Organ Shape.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
Same journal

Hidden Fungal DNA Structures May Shape Sequencing Outcomes.

BioEssays : news and reviews in molecular, cellular and developmental biology·2026
See all related articles

Related Experiment Video

Updated: Jun 16, 2026

Adaptation at the Extremes of Life: Experimental Evolution with the Extremophile Archaeon Sulfolobus acidocaldarius
08:11

Adaptation at the Extremes of Life: Experimental Evolution with the Extremophile Archaeon Sulfolobus acidocaldarius

Published on: June 14, 2024

The dynamic replicon: adapting to a changing cellular environment.

John Herrick1

  • 1jhenryherrick@yahoo.fr

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|January 22, 2010
PubMed
Summary
This summary is machine-generated.

Eukaryotic cells adjust DNA replication origin selection under stress. This review explores how cells choose replication origins and regulate their density during normal and perturbed cell cycles.

More Related Videos

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat
06:03

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat

Published on: September 20, 2016

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria
06:08

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria

Published on: January 25, 2019

Related Experiment Videos

Last Updated: Jun 16, 2026

Adaptation at the Extremes of Life: Experimental Evolution with the Extremophile Archaeon Sulfolobus acidocaldarius
08:11

Adaptation at the Extremes of Life: Experimental Evolution with the Extremophile Archaeon Sulfolobus acidocaldarius

Published on: June 14, 2024

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat
06:03

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat

Published on: September 20, 2016

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria
06:08

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria

Published on: January 25, 2019

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Eukaryotic cells face environmental and internal stresses affecting DNA replication.
  • Gene transcription patterns change during development, influencing DNA replication origin spacing.
  • Replication stress alters replication programs, decreasing origin distances.

Purpose of the Study:

  • To review mechanisms regulating replication origin selection in eukaryotic cells.
  • To understand how origin densities are controlled during genome duplication.
  • To explore origin regulation in both normal and stressed cell cycles.

Main Methods:

  • Literature review of recent evidence on DNA replication.
  • Analysis of mechanisms controlling eukaryotic replication origin selection.
  • Examination of origin density regulation during cell cycle progression.

Main Results:

  • Each replicon can have multiple potential origins, but only one is selected.
  • Replication origin selection and density are tightly regulated processes.
  • Altered replication programs under stress lead to decreased origin distances.

Conclusions:

  • Understanding replication origin selection is crucial for comprehending genome duplication.
  • Regulation of origin density is dynamic and responsive to cellular conditions.
  • This review provides insights into the complex control of DNA replication initiation.