Search results
Results From The WOW.Com Content Network
This metabolism is found in some types of bacteria and archaea which are often termed sulfate-reducing organisms. The term "dissimilatory" is used when hydrogen sulfide (H 2 S) is produced in an anaerobic respiration process. By contrast, the term "assimilatory" would be used in relation to the biosynthesis of organosulfur compounds, even ...
The uptake of sulfate by the roots and its transport to the shoot is strictly controlled and it appears to be one of the primary regulatory sites of sulfur assimilation. [3] Sulfate is actively taken up across the plasma membrane of the root cells, subsequently loaded into the xylem vessels and transported to the shoot by the transpiration stream.
Dissimilatory sulfate reduction takes sulfate and transforms it into sulfide, a sulfur source that can be distributed throughout the body. [4] Assimilatory sulfate reduction takes sulfate and turns it into cysteine. [4] Dissimilatory and assimilatory pathways both use APS reductases as a metabolic tool to produce a sulfur source and amino acids ...
In assimilatory sulfate reduction the sulfate is assimilated, or incorporated into organic compounds such as cysteine, methionine, or iron-sulfur clusters and enzyme cofactors. [13] In bacteria, sulfate and thiosulfate are transported into the cell by sulfate permeases where it can then be reduced and incorporated into biomolecules. [14]
[5] [6] [7] They are grouped as either the assimilatory or the dissimilatory sulfite reductases depending on their function, their spectroscopic properties, and their catalytic properties. This enzyme participates in selenoamino acid metabolism and sulfur assimilation .
Desulfovibrio vulgaris is the best-studied sulfate-reducing microorganism species; the bar in the upper right is 0.5 micrometre long.. Sulfate-reducing microorganisms (SRM) or sulfate-reducing prokaryotes (SRP) are a group composed of sulfate-reducing bacteria (SRB) and sulfate-reducing archaea (SRA), both of which can perform anaerobic respiration utilizing sulfate (SO 2−
Both enzymes are required for PAPS (phosphoadenosine-phosphosulfate) synthesis from inorganic sulfate. [1] [2] Within the cell sulfate adenylyltransferase plays a key role in both assimilatory sulfur reduction and dissimilatory sulfur oxidation and reduction (DSR) and participates in the biogeochemically relevant sulfur cycle.
Dissimilatory sulfite reductase (EC 1.8.99.5) is an enzyme that participates in sulfur metabolism in dissimilatory sulfate reduction. [1] The enzyme is essential in prokaryotic sulfur-based energy metabolism, including sulfate/sulfite reducing organisms, sulfur-oxidizing bacteria, and organosulfonate reducers.