Related Experiment Video
Updated: Jan 29, 2026
06:32
Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique
Published on: March 9, 2022
2.2K
Deciphering the Molecular Mechanism Underpinning Phage Arbitrium Communication Systems
Francisca Gallego Del Sol1, José R Penadés2, Alberto Marina1
1Instituto de Biomedicina de Valencia (IBV-CSIC) and CIBER de Enfermedades Raras (CIBERER), 46010 Valencia, Spain.
Molecular Cell
|February 13, 2019
Summary
Bacterial viruses called Bacillus phages use a communication system, arbitrium, to control cell division. This system involves a peptide (AimP) that binds a factor (AimR) to promote viral dormancy, preventing cell death.
Area of Science:
- Microbiology
- Molecular Biology
- Structural Biology
Background:
- Bacillus phages utilize a communication system, arbitrium, to regulate lysis-lysogeny decisions.
- Arbitrium signaling involves a secreted hexapeptide (AimP) that influences phage life cycle.
- AimP binding to AimR promotes lysogeny by inhibiting the expression of the AimX regulator.
Purpose of the Study:
- To elucidate the molecular mechanisms of the arbitrium communication system in Bacillus phages.
- To determine the crystal structures of the AimR transcription factor in various states.
Main Methods:
- X-ray crystallography was used to determine the structures of AimR.
- Structural analysis of AimR in apo form, DNA-bound, and AimP-bound states.
- Biochemical assays to characterize AimR-DNA and AimR-AimP interactions.
Main Results:
- The crystal structures of Bacillus subtilis SPbeta phage AimR were determined.
- AimR exhibits plasticity and shares features with the RRNPP quorum-sensing family.
- AimP binding induces a compact AimR conformation, inhibiting its DNA binding to the aimX promoter.
Conclusions:
- The study reveals the molecular basis of the arbitrium communication system.
- Structural insights explain how AimP binding regulates AimR activity and lysogeny.
- This work provides a foundation for understanding phage-host interactions and regulatory networks.
Related Concept Videos
01:22Mechanical Systems
636
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
636
01:19Electro-mechanical Systems
1.7K
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
1.7K
01:03Communication
8.7K
Communication between two animals occurs when one animal transmits an information signal that causes a change in the animal that receives the information. Organisms communicate with one another in a host of different ways. Signals can be auditory, chemical, visual, tactile, or a combination of these. Communication is a critical behavioral adaptation that promotes survival, growth, and reproduction.
8.7K
01:28Communication
9.7K
Sharing information, concepts, and emotions to foster mutual understanding is communication. The sender, recipient, and transaction must be considered in this manner. The sender is the person who shares the message, the recipient is the person who receives and understands the message, and the transaction is the method used to deliver the message and the variables that affect the communication's context and surroundings. The nurse-client connection is built on therapeutic communication.
9.7K
01:28Neuronal Communication
3.3K
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
3.3K
01:30Therapeutic Communication
8.0K
Communication is a lifelong learning process. Through therapeutic communication, nurses can collect relevant assessment data, provide education and counseling, and interact during nursing interventions. Sending and receiving messages occur through verbal and nonverbal communication techniques and can happen separately or simultaneously.
Verbal communication depends on language or a prescribed way of using words so that people can share information effectively. The critical aspects of verbal...
Verbal communication depends on language or a prescribed way of using words so that people can share information effectively. The critical aspects of verbal...
8.0K