Related Experiment Video
Updated: Jun 14, 2026
09:11
Screening for Thermotoga maritima Membrane-Bound Pyrophosphatase Inhibitors
Published on: November 23, 2019
Hypophosphite Is a Naturally Occurring Selective Inhibitor of Syntrophic Methanogenesis.
Ruiwen Hu1,2, Matt E Weaver2,3, Leslie A Day4
1Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
Environmental Science & Technology
|June 12, 2026
Summary
Hypophosphite inhibits syntrophic methanogenesis by targeting formate metabolism. This safe and inexpensive compound offers a novel strategy for controlling methane emissions from ecosystems.
Area of Science:
- Environmental microbiology
- Biogeochemical cycles
- Methane mitigation
Background:
- Microbial methanogenesis significantly contributes to global warming and represents energy loss in ecosystems.
- Current methane control strategies primarily target methanogenic archaeal enzymes, leaving the chemical space underexplored.
- Interfering with syntrophic electron carriers (H2 or formate) offers an alternative target for methane control.
Purpose of the Study:
- To investigate hypophosphite as a potential inhibitor of methanogenesis.
- To identify the mechanism and target of hypophosphite action in methanogenic systems.
- To evaluate the safety and efficacy of hypophosphite for methane control.
Main Methods:
- Testing hypophosphite inhibition of methanogenesis in rice field sediments and cattle rumens.
- Conducting genetic screens and physiological assays in *Methanococcus maripaludis* S2.
- Assessing hypophosphite stability and potential environmental impact.
Main Results:
- Hypophosphite selectively inhibited syntrophic methanogenesis over primary fermentation.
- Formate metabolism was identified as the target of hypophosphite inhibition in *M. maripaludis* S2.
- Hypophosphite demonstrated stability in anoxic environments and is generally recognized as safe.
Conclusions:
- Hypophosphite is a potent and selective inhibitor of syntrophic methanogenesis.
- Hypophosphite represents a safe, inexpensive, and novel strategy for methane control in various ecosystems.
- Hypophosphite's stability and natural occurrence suggest a role in modulating environmental carbon cycles.
Related Concept Videos
01:26Microbes and Methanogenesis
Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...
01:15Metabolism of Chemolithotrophs
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation. However, because inorganic electron donors...
01:25Microbial Interactions: Mutualism
Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through this...
01:42Phosphoinositides and PIPs
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
01:20Sulfur Assimilation
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
01:28Microbial Nutrition
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...