Fructose 1,6-bisphosphate

Fructose 1,6-bisphosphate
Identifiers
CAS number	488-69-7 Y
PubChem	445557
ChemSpider	393165 Y
MeSH	fructose-1,6-diphosphate
ChEBI	CHEBI:40595 Y
ChEMBL	CHEMBL1089962 Y
ATC code	C01EB07
Jmol-3D images	Image 1
SMILES O=P(OC[C@]1(O)O[C@@H]([C@@H](O)[C@@H]1O)COP(=O)(O)O)(O)O
InChI InChI=1S/C6H14O12P2/c7-4-3(1-16-19(10,11)12)18-6(9,5(4)8)2-17-20(13,14)15/h3-5,7-9H,1-2H2,(H2,10,11,12)(H2,13,14,15)/t3-,4-,5+,6+/m1/s1 Y Key: RNBGYGVWRKECFJ-ZXXMMSQZSA-N Y InChI=1/C6H14O12P2/c7-4-3(1-16-19(10,11)12)18-6(9,5(4)8)2-17-20(13,14)15/h3-5,7-9H,1-2H2,(H2,10,11,12)(H2,13,14,15)/t3-,4-,5+,6+/m1/s1 Key: RNBGYGVWRKECFJ-ZXXMMSQZBN
Properties
Molecular formula	C6H14O12P2
Molar mass	340.116
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

Fructose 1,6-bisphosphate (also known as Harden-young ester) is fructose sugar phosphorylated on carbons 1 and 6 (i.e., is a fructosephosphate). The β-D-form of this compound is very common in cells. The vast majority of glucose and fructose entering a cell will become converted to fructose 1,6-biphosphate at some point.

Contents 1 Fructose 1,6-bisphosphate in glycolysis 2 Fructose 1,6-phosphate isomerism 3 Iron Chelation 4 See also 5 References

Fructose 1,6-bisphosphate in glycolysis

Fructose 1,6-bisphosphate lies within the glycolysis metabolic pathway and is produced by phosphorylation of fructose 6-phosphate. It is, in turn, broken down into two compounds: glyceraldehyde 3-phosphate and dihydroxyacetone phosphate. It is an allosteric activator of pyruvate kinase.

β-D-fructose 6-phosphate	6-phosphofructo 1-kinase		β-D-fructose 1,6-phosphate	Fructose bisphosphate aldolase		D-glyceraldehyde 3-phosphate		dihydroxyacetone phosphate
							+
	ATP	ADP
	Pi	H2O
	Hexose diphosphatase			Fructose bisphosphate aldolase

Compound C05345 at KEGG Pathway Database. Enzyme 2.7.1.11 at KEGG Pathway Database. Enzyme 3.1.3.11 at KEGG Pathway Database. 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.

Fructose 1,6-phosphate isomerism

Fructose 1,6-phosphate has only one biologically active isomer, the β-D-form. There are many other isomers, analogous to those of fructose.

Iron Chelation

Fructose 1,6-bis(phosphate) has also been implicated in the ability to bind and sequester Fe(II), a soluble form of iron whose oxidation to the insoluble Fe(III) is capable of generating reactive oxygen species via Fenton chemistry. The ability of fructose 1,6-bis(phosphate) to bind Fe(II) may prevent such electron transfers, and thus act as an antioxidant within the body. Certain neurodegenerative diseases, like Alzheimer's and Parkinson's, have been linked to metal deposits with high iron content, although it is uncertain whether Fenton chemistry plays a substantial role in these diseases, or whether fructose 1,6-bis(phosphate) is capable of mitigating those effects.^[1]

See also

• Fructose 2,6-bisphosphate

Glucose Hexokinase Glucose 6-phosphate Glucose-6-phosphate isomerase Fructose 6-phosphate phosphofructokinase-1 Fructose 1,6-bisphosphate Fructose bisphosphate aldolase ATP ADP ATP ADP Dihydroxyacetone phosphate Glyceraldehyde 3-phosphate Triosephosphate isomerase Glyceraldehyde 3-phosphate Glyceraldehyde-3-phosphate dehydrogenase 1,3-Bisphosphoglycerate NAD+ + Pi NADH + H+ + 2 2 Phosphoglycerate kinase 3-Phosphoglycerate Phosphoglycerate mutase 2-Phosphoglycerate Phosphopyruvate hydratase(Enolase) Phosphoenolpyruvate Pyruvate kinase Pyruvate ADP ATP H2O ADP ATP 2 2 2 2 M: MET mt, k, c/g/r/p/y/i, f/h/s/l/o/e, a/u, n, m k, cgrp/y/i, f/h/s/l/o/e, au, n, m, epon m(A16/C10),i(k, c/g/r/p/y/i, f/h/s/o/e, a/u, n, m)

References