Ribulose 5-phosphate

Ribulose 5-phosphate is one of the end-products of the pentose phosphate pathway. It is also an intermediate in the Calvin cycle.

Ribulose 5-phosphate

Names
IUPAC name D-Ribulose 5-phosphate 5-O-Phosphono-D-ribulose
Systematic IUPAC name d-erythro-Pent-2-ulose 5-(dihydrogen phosphate)[1]
Identifiers
CAS Number	551-85-9 D Y 4151-19-3 D/L
3D model (JSmol)	Interactive image
ChEBI	CHEBI:17363 Y
ChemSpider	388327 Y
MeSH	ribulose+5-phosphate
PubChem CID	439184
UNII	THU37VTP7Y Y
CompTox Dashboard (EPA)	DTXSID001336250
InChI InChI=1S/C5H11O8P/c6-1-3(7)5(9)4(8)2-13-14(10,11)12/h4-6,8-9H,1-2H2,(H2,10,11,12)/p-2/t4-,5+/m1/s1 Y Key: FNZLKVNUWIIPSJ-UHNVWZDZSA-L Y InChI=1/C5H11O8P/c6-1-3(7)5(9)4(8)2-13-14(10,11)12/h4-6,8-9H,1-2H2,(H2,10,11,12)/p-2/t4-,5+/m1/s1 Key: FNZLKVNUWIIPSJ-DAZPBWGKBO
SMILES C([C@H]([C@H](C(=O)CO)O)O)OP(=O)(O)O
Properties
Chemical formula	C5H11O8P
Molar mass	230.109 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

It is formed by phosphogluconate dehydrogenase in the pentose phosphate pathway.^[2][3] Ribulose 5-phosphate is involved in various metabolic pathways. Ribulose 5-phosphate can be acted upon by phosphopentose isomerase to form ribose 5-phosphate, which is a precursor for nucleotide and co-factor biosynthesis.^[2] Ribulose-5 phosphate can also be acted upon by phosphopentose epimerase to form xylulose 5-phosphate, which is used in the nonoxidative phase of the pentose phosphate pathway in humans to generate precursor molecules for the synthesis of aromatic amino acids and production of energy.^[3]

In plants, ribulose 5-phosphate produced from the pentose-phosphate pathway is converted into ribulose-1,5-bisphosphate by the enzyme phosphoribokinase.

See also

• Ribulose
• Ribulose-1,5-bisphosphate