3 phosphoglyceric acid

    3-Phosphoglyceric acid GudangMovies21 Rebahinxxi LK21

    3-Phosphoglyceric acid (3PG, 3-PGA, or PGA) is the conjugate acid of 3-phosphoglycerate or glycerate 3-phosphate (GP or G3P). This glycerate is a biochemically significant metabolic intermediate in both glycolysis and the Calvin-Benson cycle. The anion is often termed as PGA when referring to the Calvin-Benson cycle. In the Calvin-Benson cycle, 3-phosphoglycerate is typically the product of the spontaneous scission of an unstable 6-carbon intermediate formed upon CO2 fixation. Thus, two equivalents of 3-phosphoglycerate are produced for each molecule of CO2 that is fixed. In glycolysis, 3-phosphoglycerate is an intermediate following the dephosphorylation (reduction) of 1,3-bisphosphoglycerate.: 14 


    Glycolysis



    In the glycolytic pathway, 1,3-bisphosphoglycerate is dephosphorylated to form 3-phosphoglyceric acid in a coupled reaction producing two ATP via substrate-level phosphorylation. The single phosphate group left on the 3-PGA molecule then moves from an end carbon to a central carbon, producing 2-phosphoglycerate. This phosphate group relocation is catalyzed by phosphoglycerate mutase, an enzyme that also catalyzes the reverse reaction.

    Compound C00236 at KEGG Pathway Database. Enzyme 2.7.2.3 at KEGG Pathway Database. Compound C00197 at KEGG Pathway Database. Enzyme 5.4.2.1 at KEGG Pathway Database. Compound C00631 at KEGG Pathway Database.
    Click on genes, proteins and metabolites below to link to respective articles.


    Calvin-Benson cycle


    In the light-independent reactions (also known as the Calvin-Benson cycle), two 3-phosphoglycerate molecules are synthesized. RuBP, a 5-carbon sugar, undergoes carbon fixation, catalyzed by the rubisco enzyme, to become an unstable 6-carbon intermediate. This intermediate is then cleaved into two, separate 3-carbon molecules of 3-PGA. One of the resultant 3-PGA molecules continues through the Calvin-Benson cycle to be regenerated into RuBP while the other is reduced to form one molecule of glyceraldehyde 3-phosphate (G3P) in two steps: the phosphorylation of 3-PGA into 1,3-bisphosphoglyceric acid via the enzyme phosphoglycerate kinase (the reverse of the reaction seen in glycolysis) and the subsequent catalysis by glyceraldehyde 3-phosphate dehydrogenase into G3P. G3P eventually reacts to form the sugars such as glucose or fructose or more complex starches.: 156 


    Amino acid synthesis


    Glycerate 3-phosphate (formed from 3-phosphoglycerate) is also a precursor for serine, which, in turn, can create cysteine and glycine through the homocysteine cycle.


    Measurement


    3-phosphoglycerate can be separated and measured using paper chromatography as well as with column chromatography and other chromatographic separation methods. It can be identified using both gas-chromatography and liquid-chromatography mass spectrometry and has been optimized for evaluation using tandem MS techniques.


    See also


    2-Phosphoglyceric acid
    Calvin-Benson cycle
    Photosynthesis
    Ribulose 1,5-bisphosphate


    References

Kata Kunci Pencarian: 3 phosphoglyceric acid

3 phosphoglyceric acid3 phosphoglyceric acid structure3 phosphoglyceric acid formula3 phosphoglyceric acid how many carbons3 phosphoglyceric acid function3 phosphoglyceric acid synthesis3 phosphoglyceric acid glycolysis3 phosphoglyceric acid has how many carbon atoms3 phosphoglyceric acid disodium salt3 phosphoglyceric acid has how many carbons Search Results

3 phosphoglyceric acid

Daftar Isi

CBSE Class 11-science Answered - TopperLearning

Jan 16, 2018 · 3-phosphoglyceric acid is a stable species. It has OH group attached to the phosphate. When this compound is about to enter a metabolic reaction, it loses its H ions and gets converted into 3-phosphoglycerate. This compound is unstable and immediately gets stabilized by accepting H ions and gets converted into 3-phosphoglyceric acid.

The reaction forming 3-phosphoglyceric acid in ... - TopperLearning

Jul 24, 2019 · 1,3-Bisphosphoglyceric acid (3C) transfers its one phosphate group to ADP and gets converted to 3-phosphoglyceric acid (3C). This reaction is called direct phosphorylation or substrate level phosp - jz42e533

C3 and C4 cycles........ - jipq79yy - TopperLearning

Sep 20, 2018 · During carboxylation, CO 2 combines with ribulose 1,5-biphosphate to produce an intermediate compound, which splits in the presence of water to form two molecules of 3-phosphoglyceric acid (PGA). Reduction. During reduction or the glycolytic reversal phase, carbohydrate is formed at the expense of the photochemically made ATP and NADPH ...