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

Other Stress Responses in Bacteria01:30

Other Stress Responses in Bacteria

34
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
34
Stringent Response in E. coli01:23

Stringent Response in E. coli

32
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
32
Bacterial Protein Maturation01:26

Bacterial Protein Maturation

41
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
41
Activation and Inactivation of G Proteins01:22

Activation and Inactivation of G Proteins

7.3K
Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
7.3K
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

13.6K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.6K
Global Regulatory Systems01:28

Global Regulatory Systems

45
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
45

You might also read

Related Articles

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

Sort by
Same author

Stress-induced ribosome degradation in Bacillus subtilis is mediated by the RNase Y-specificity complex.

Nature communications·2026
Same author

Characterization of Tellurite Toxicity to <i>Escherichia coli</i> Under Aerobic and Anaerobic Conditions.

International journal of molecular sciences·2025
Same author

RNA-binding protein YebC enhances translation of proline-rich amino acid stretches in bacteria.

Nature communications·2025
Same author

MdfA is a novel ClpC adaptor protein that functions in the developing <i>Bacillus subtilis</i> spore.

Genes & development·2025
Same author

Soft X-ray tomography reveals variations in B. subtilis biofilm structure upon tasA deletion.

NPJ biofilms and microbiomes·2025
Same author

Membrane depolarization kills dormant Bacillus subtilis cells by generating a lethal dose of ROS.

Nature communications·2024
Same journal

Predicted bacterial uRBSs reveal translational coupling and ribosome-mediated RBS occlusion as gene-controlling mechanisms.

microLife·2026
Same journal

Correction to: <i>Salmonella</i> relies on siderophore exploitation at low pH.

microLife·2026
Same journal

A <i>Chryseobacterium massiliae</i> pore-forming MACPF domain protein mediates intra and interspecies competition against <i>Bacteroides</i>.

microLife·2026
Same journal

Comparative proteome analyses of human natural killer cells from patients after allogeneic stem cell transplantation and healthy individuals challenged with <i>Aspergillus fumigatus</i>.

microLife·2026
Same journal

Dual regulation of <i>cueP</i> by the CueR and Cpx systems enables <i>Salmonella</i> adaptation to copper and <i>N</i>-chlorotaurine.

microLife·2026
Same journal

Methods for evaluating bacterial dispersal on hyphal networks.

microLife·2026
See all related articles

Related Experiment Video

Updated: Jul 28, 2025

Using Microtiter Dish Radiolabeling for Multiple In Vivo Measurements Of Escherichia coli pppGpp Followed by Thin Layer Chromatography
06:30

Using Microtiter Dish Radiolabeling for Multiple In Vivo Measurements Of Escherichia coli pppGpp Followed by Thin Layer Chromatography

Published on: June 4, 2019

6.1K

(p)ppGpp - an important player during heat shock response.

Kristina Driller1,2, Fabián A Cornejo1, Kürşad Turgay1,2

  • 1Max Planck Unit for the Science of Pathogens, Charitéplatz 1, 10117 Berlin, Germany.

Microlife
|May 30, 2023
PubMed
Summary
This summary is machine-generated.

The alarmones (p)ppGpp regulate bacterial stress responses by downregulating translation during heat shock. In Bacillus subtilis, they work with the Spx regulator to manage protein quality control and adaptation.

Keywords:
(p)ppGppBacillus subtilisRel (RSH)heat shock responsesecond messengerstringent response

More Related Videos

A Purification and In Vitro Activity Assay for a pppGpp Synthetase from Clostridium difficile
09:53

A Purification and In Vitro Activity Assay for a pppGpp Synthetase from Clostridium difficile

Published on: November 3, 2018

8.4K
Measurements of Physiological Stress Responses in C. Elegans
10:36

Measurements of Physiological Stress Responses in C. Elegans

Published on: May 21, 2020

14.0K

Related Experiment Videos

Last Updated: Jul 28, 2025

Using Microtiter Dish Radiolabeling for Multiple In Vivo Measurements Of Escherichia coli pppGpp Followed by Thin Layer Chromatography
06:30

Using Microtiter Dish Radiolabeling for Multiple In Vivo Measurements Of Escherichia coli pppGpp Followed by Thin Layer Chromatography

Published on: June 4, 2019

6.1K
A Purification and In Vitro Activity Assay for a pppGpp Synthetase from Clostridium difficile
09:53

A Purification and In Vitro Activity Assay for a pppGpp Synthetase from Clostridium difficile

Published on: November 3, 2018

8.4K
Measurements of Physiological Stress Responses in C. Elegans
10:36

Measurements of Physiological Stress Responses in C. Elegans

Published on: May 21, 2020

14.0K

Area of Science:

  • Microbiology
  • Molecular Biology
  • Cellular Stress Response

Background:

  • Alarmones and second messengers, such as guanosine tetra- and pentaphosphate ((p)ppGpp), are crucial for bacterial survival under nutrient stress.
  • The stringent response mediated by (p)ppGpp is well-characterized for amino acid starvation but its role in other stress conditions is less understood.
  • Recent findings highlight the involvement of (p)ppGpp in the heat shock response in Bacillus subtilis, revealing a connection with the Spx transcriptional regulator.

Purpose of the Study:

  • To review the multifaceted roles of (p)ppGpp in bacterial stress response networks.
  • To elucidate the interplay between (p)ppGpp, the heat shock response, and the Spx regulator in Bacillus subtilis.
  • To discuss the implications of (p)ppGpp in cellular adaptation to environmental challenges.

Main Methods:

  • Literature review of studies on bacterial stress responses.
  • Analysis of the functional overlap between (p)ppGpp and Spx in Bacillus subtilis.
  • Integration of knowledge on translational regulation and protein quality control under stress.

Main Results:

  • Alarmones (p)ppGpp facilitate rapid, stress-induced downregulation of translation.
  • Spx acts in concert with (p)ppGpp to inhibit translation-related gene expression during heat shock.
  • This coordinated response reduces the burden on the protein quality control system, while inducing chaperone and protease expression.

Conclusions:

  • The (p)ppGpp alarmones are integral components of the heat shock response in Bacillus subtilis.
  • A complex regulatory network involving (p)ppGpp and Spx orchestrates cellular adaptation to heat stress.
  • Understanding these intricate connections is vital for comprehending bacterial stress physiology and survival strategies.