Dihydroxyacetone phosphate

Dihydroxyacetone phosphate
IUPAC name 3-Hydroxy-2-oxopropyl phosphate
Other names Dihydroxyacetone phosphate DHAP
Identifiers
CAS number	57-04-5 Y
PubChem	4643300
ChemSpider	3833110 Y
ChEBI	CHEBI:57642 Y
Jmol-3D images	Image 1
SMILES [O-]P([O-])(=O)OCC(=O)CO
InChI InChI=1S/C3H7O6P/c4-1-3(5)2-9-10(6,7)8/h4H,1-2H2,(H2,6,7,8)/p-2 Y Key: GNGACRATGGDKBX-UHFFFAOYSA-L Y InChI=1/C3H7O6P/c4-1-3(5)2-9-10(6,7)8/h4H,1-2H2,(H2,6,7,8)/p-2 Key: GNGACRATGGDKBX-NUQVWONBAJ
Properties
Molecular formula	C3H7O6P
Molar mass	170.06 g/mol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Dihydroxyacetone phosphate (DHAP) is a biochemical compound involved in many reactions, from the Calvin cycle in plants to the ether-lipid biosynthesis process in Leishmania mexicana. Its major biochemical role is in the glycolysis metabolic pathway. DHAP may be referred to as glycerone phosphate in older texts.

Dihydroxyacetone phosphate in glycolysis

Dihydroxyacetone phosphate lies in the glycolysis metabolic pathway, and is one of the two products of breakdown of fructose 1,6-bisphosphate, along with glyceraldehyde 3-phosphate. It is rapidly and reversibly isomerised to glyceraldehyde 3-phosphate.

β-D-fructose 1,6-bisphosphate	fructose-bisphosphate aldolase		D-glyceraldehyde 3-phosphate		dihydroxyacetone phosphate
				+
	fructose-bisphosphate aldolase

Compound C05378 at KEGG Pathway Database. Enzyme 4.1.2.13 at KEGG Pathway Database. Compound C00111 at KEGG Pathway Database. Compound C00118 at KEGG Pathway Database.

The numbering of the carbon atoms indicates the fate of the carbons according to their position in fructose 6-phosphate.

Dihydroxyacetone phosphate	triose phosphate isomerase		D-glyceraldehyde 3-phosphate
	triose phosphate isomerase

Compound C00111 at KEGG Pathway Database.Enzyme 5.3.1.1 at KEGG Pathway Database.Compound C00118 at KEGG Pathway Database.

Click on genes, proteins and metabolites below to link to respective articles.

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Glycolysis and Gluconeogenesis edit

Dihydroxyacetone phosphate in other pathways

In the Calvin cycle, DHAP is one of the products of the sixfold reduction of 1,3-bisphosphoglycerate by NADPH. It is also used in the synthesis of sedoheptulose 1,7-bisphosphate and fructose 1,6-bisphosphate, both of which are used to reform ribulose 5-phosphate, the 'key' carbohydrate of the Calvin cycle.

DHAP is also the product of the dehydrogenation of L-glycerol-3-phosphate, which is part of the entry of glycerol (sourced from triglycerides) into the glycolytic pathway. On the converse, reduction of glycolysis-derived DHAP to L-glycerol-3-phosphate provides adipose cells with the activated glycerol backbone they require to synthesize new triglycerides. Both reactions are catalyzed by the enzyme glycerol 3-phosphate dehydrogenase with NAD⁺/NADH as cofactor.

See also

• Dihydroxyacetone
• Glycerol 3-phosphate shuttle