assimilatory sulfate reduction

(noun)

The reduction of 3'-Phosphoadenosine-5'-phosphosulfate, a more elaborated sulfateester, leads also to hydrogen sulfide, the product used in biosynthesis (e.g., for the production of cysteine because the sulfate sulfur is assimilated).

Related Terms

  • extremophile

Examples of assimilatory sulfate reduction in the following topics:

  • The Sulfur Cycle

    • Plants and microbes assimilate sulfate and convert it into organic forms.
    • Lots of bacteria reduce small amounts of sulfates to synthesize sulfur-containing cell components; this is known as assimilatory sulfate reduction.
    • By contrast, the sulfate-reducing bacteria considered here reduce sulfate in large amounts to obtain energy and expel the resulting sulfide as waste.
    • This process is known as dissimilatory sulfate reduction.
    • In a sense, they breathe sulfate.
  • Sulfate and Sulfur Reduction

    • Sulfate reduction is a type of anaerobic respiration that utilizes sulfate as a terminal electron acceptor in the electron transport chain.
    • Sulfate reduction is a type of anaerobic respiration that utilizes sulfate as a terminal electron acceptor in the electron transport chain.
    • The hydrogen produced during fermentation is actually what drives respiration during sulfate reduction.
    • Many bacteria reduce small amounts of sulfates in order to synthesize sulfur-containing cell components; this is known as assimilatory sulfate reduction.
    • Outline the process of sulfate and sulfur reduction including its various purposes
  • Electron Donors and Acceptors in Anaerobic Respiration

    • Instead, molecules such as sulfate (SO42-), nitrate (NO3-), or sulfur (S) are used as electron acceptors.
    • Nitrate, like oxygen, has a high reduction potential.
    • Sulfate reduction uses sulfate (SO2−4) as the electron acceptor, producing hydrogen sulfide (H2S) as a metabolic end product.
    • Sulfate reduction is a relatively energetically poor process, and is used by many Gram negative bacteria found within the δ-Proteobacteria.
    • Sulfate reduction requires the use of electron donors, such as the carbon compounds lactate and pyruvate (organotrophic reducers), or hydrogen gas (lithotrophic reducers).
  • Archaeoglobus

    • Archaeoglobus are sulfate-reducing archaea, coupling the reduction of sulfate to sulfide with the oxidation of many different organic carbon sources, including complex polymers.
    • Archaeoglobus are lithotrophs, and can be either autotrophic or heterotrophic.The archaeoglobus strain A. lithotrophicus are lithoautotrophs, and derive their energy from hydrogen, sulfate and carbon dioxide.
  • Microbial Ore Leaching

    • In the process, free electrons are generated and used for the reduction of oxygen to water which produces energy in the bacterial cell.
    • The net products of the reaction are soluble ferrous sulfate and sulfuric acid.
  • Oxidation of Reduced Sulfur Compounds

    • Biochemically, reduced sulfur compounds are converted to sulfite (SO2−3) and, subsequently, sulfate (SO2−4) by the enzyme sulfite oxidase.
    • Some organisms, however, accomplish the same oxidation using a reversal of the APS reductase system used by sulfate-reducing bacteria (see above).
    • Marine autotrophic Beggiatoa species are able to oxidize intracellular sulfur to sulfate.
    • The reduction of elemental sulfur frequently occurs when oxygen is lacking.
  • The Acetyl-CoA Pathway

    • The acetyl coenzyme A (CoA) pathway, commonly referred to as the Wood-Ljungdahl pathway or the reductive acetyl-CoA pathway, is one of the major metabolic pathways utilized by bacteria.
    • The acetyl-CoA pathway begins with the reduction of a carbon dioxide to carbon monoxide.
    • Carbon monoxide dehydrogenase, the enzyme responsible for the reduction of a carbon dioxide to a carbonyl group, functions in numerous biochemical processes.
    • These processes include metabolism of methanogens, acetogenic and sulfate-reducing bacteria.
  • Wetland Soils

    • Some anaerobic microbial processes include denitrification , sulfate reduction and methanogenesis and are responsible for the release of N2 (nitrogen), H2S (hydrogen sulfide) and CH4 (methane).
    • Redox potential, or reduction potential , is used to express the likelihood of an environment to receive electrons and therefore become reduced.
Subjects
  • Accounting
  • Algebra
  • Art History
  • Biology
  • Business
  • Calculus
  • Chemistry
  • Communications
  • Economics
  • Finance
  • Management
  • Marketing
  • Microbiology
  • Physics
  • Physiology
  • Political Science
  • Psychology
  • Sociology
  • Statistics
  • U.S. History
  • World History
  • Writing

Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0 with attribution required.