Ribulose

D-Ribulose

Names
IUPAC name (3R,4R)-1,3,4,5-Tetrahydroxypentan-2-one
Other names D-erythro-2-Pentulose Adonose Arabinulose Araboketose Ribosone
Identifiers
CAS Number	488-84-6 (D) 2042027-5 (L) 5556-48-9 (DL)
ChEBI	CHEBI:28721
ChemSpider	133316
Jmol interactive 3D	(D): Image (L): Image
PubChem	151261
InChI InChI=1S/C5H10O5/c6-1-3(8)5(10)4(9)2-7/h3,5-8,10H,1-2H2/t3-,5-/m1/s1 Key: ZAQJHHRNXZUBTE-NQXXGFSBSA-N InChI=1/C5H10O5/c6-1-3(8)5(10)4(9)2-7/h3,5-8,10H,1-2H2/t3-,5-/m1/s1 Key: ZAQJHHRNXZUBTE-NQXXGFSBBP
SMILES (D): C([C@H]([C@H](C(=O)CO)O)O)O (L): OCC([C@@H](O)[C@@H](O)CO)=O
Properties
Chemical formula	C5H10O5
Molar mass	150.13 g·mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Ribulose is a ketopentose — a monosaccharide containing five carbon atoms, and including a ketone functional group. It has chemical formula C₅H₁₀O₅. Two enantiomers are possible, D-ribulose (D-erythro-pentulose) and L-ribulose (L-erythro-pentulose). D-Ribulose is the diastereomer of D-xylulose.

Ribulose sugars are composed in the pentose phosphate pathway. They are important in the formation of many bioactive substances. For example, D-ribulose is an intermediate in the fungal pathway for D-arabitol production. Also, as the 1,5-bisphosphate, D-ribulose combines with carbon dioxide at the start of the photosynthesis process in green plants (carbon dioxide trap).

References