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

Frequency-dependent Selection01:21

Frequency-dependent Selection

24.2K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
24.2K
Drug Dependence01:17

Drug Dependence

1.7K
Medications are typically administered to achieve therapeutic effects. Some drugs can modify an individual's mood and perception, frequently resulting in various enjoyable experiences. However, this can result in drug dependency, a condition marked by continuous drug use despite potential negative consequences. Drug dependency primarily falls into two categories: psychological and physical dependence. Psychological dependence occurs when the pleasurable feelings induced by the drug...
1.7K
Contact-dependent Signaling01:19

Contact-dependent Signaling

47.6K
Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
47.6K
Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

89.2K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
89.2K
Independent and Dependent Sources01:18

Independent and Dependent Sources

2.6K
In electrical circuits, sources play a crucial role in providing power for the operation of the circuit. These sources can be broadly categorized into two types: independent and dependent.
Independent voltage or current sources supply a fixed amount of voltage or current, respectively, which is unaffected by other elements within the circuit. These are represented using specific symbols. Independent voltage sources are symbolized with polarities (+ and -), indicating the direction of the...
2.6K
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

6.2K
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
6.2K

You might also read

Related Articles

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

Sort by
Same author

Elevating Haloperoxidase Expression in Escherichia coli through Fusion with a Formate Oxidase.

Chembiochem : a European journal of chemical biology·2026
Same author

Sulfated phenolic acids in plants.

Planta·2022
Same author

Chemoenzymatic Hunsdiecker-Type Decarboxylative Bromination of Cinnamic Acids.

ACS catalysis·2022
Same author

Water-Soluble Anthraquinone Photocatalysts Enable Methanol-Driven Enzymatic Halogenation and Hydroxylation Reactions.

ACS catalysis·2020
Same author

Chemoenzymatic Halocyclization of 4-Pentenoic Acid at Preparative Scale.

ACS sustainable chemistry & engineering·2020
Same author

Chemoenzymatic Halocyclization of γ,δ-Unsaturated Carboxylic Acids and Alcohols.

ChemSusChem·2019

Related Experiment Video

Updated: Feb 8, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
11:10

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Published on: May 23, 2018

12.5K

Marine Vanadium-Dependent Haloperoxidases, Their Isolation, Characterization, and Application.

Ron Wever1, Bea E Krenn2, Rokus Renirie1

  • 1University of Amsterdam, Van't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands.

Methods in Enzymology
|June 19, 2018
PubMed
Summary

Vanadium-dependent haloperoxidases from various organisms are crucial for producing halogenated compounds that impact atmospheric chemistry and ozone depletion. This review details their sources, properties, and applications in biosynthesis.

Keywords:
Assay systemsAtmospheric chemistryBiophysical and spectroscopic methodsBiosynthesisBromoformCyanobacteriaHomologyKinetic parametersPhytoplanktonPurification proceduresRed and brown seaweedsVanadium-dependent haloperoxidases

More Related Videos

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

12.0K
Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
15:39

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm

Published on: February 28, 2017

8.6K

Related Experiment Videos

Last Updated: Feb 8, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
11:10

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Published on: May 23, 2018

12.5K
Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

12.0K
Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
15:39

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm

Published on: February 28, 2017

8.6K

Area of Science:

  • Biochemistry
  • Environmental Science
  • Marine Biology

Background:

  • Vanadium-dependent haloperoxidases (VHPs) are enzymes found in diverse organisms like seaweeds, cyanobacteria, fungi, and phytoplankton.
  • These enzymes catalyze the formation of halogenated volatile compounds (halocarbons).
  • Halocarbons released into the environment significantly influence atmospheric chemistry, contributing to ozone depletion.

Purpose of the Study:

  • To provide a comprehensive survey of VHPs, covering their sources, isolation, and purification.
  • To describe methods for detecting and quantifying VHP activity and their kinetic properties.
  • To review recent advancements in VHP structure-function relationships and their biosynthetic applications.

Main Methods:

  • Literature review of VHP sources, properties, and isolation techniques.
  • Description of assays for VHP activity detection and quantification.
  • Analysis of kinetic properties and structural data of VHPs.

Main Results:

  • VHPs are widespread and play a key role in environmental halocarbon production.
  • Detailed insights into enzyme isolation, purification challenges, and activity assays are provided.
  • Recent structural and functional research highlights VHP versatility in biosynthesis.

Conclusions:

  • Vanadium-dependent haloperoxidases are significant contributors to environmental halocarbon release.
  • Understanding VHP properties and applications is crucial for studying atmospheric chemistry and developing biotechnological tools.
  • This review offers practical guidance and highlights future research directions for VHPs.