Zebularine

Zebularine is a nucleoside analog of cytidine. It is a transition state analog inhibitor of cytidine deaminase by binding to the active site as covalent hydrates. Also shown to inhibit DNA methylation and tumor growth both in vitro and in vivo.^[1]

Zebularine

Names
IUPAC name 1-(β-D-Ribofuranosyl)pyrimidin-2(1H)-one
Systematic IUPAC name 1-[(2R,3R,4S,5R)-3,4-Dihydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidin-2(1H)-one
Other names Pyrimidin-2-one β-D-ribofuranoside
Identifiers
CAS Number	3690-10-6
3D model (JSmol)	Interactive image
ChemSpider	90372
IUPHAR/BPS	4729
PubChem CID	100016
UNII	7A9Y5SX0GY Y
CompTox Dashboard (EPA)	DTXSID20958099
InChI InChI=1S/C9H12N2O5/c12-4-5-6(13)7(14)8(16-5)11-3-1-2-10-9(11)15/h1-3,5-8,12-14H,4H2/t5-,6-,7-,8-/m1/s1 Key: RPQZTTQVRYEKCR-WCTZXXKLSA-N InChI=1/C9H12N2O5/c12-4-5-6(13)7(14)8(16-5)11-3-1-2-10-9(11)15/h1-3,5-8,12-14H,4H2/t5-,6-,7-,8-/m1/s1 Key: RPQZTTQVRYEKCR-WCTZXXKLBP
SMILES O=C1/N=C\C=C/N1[C@@H]2O[C@@H]([C@@H](O)[C@H]2O)CO
Properties
Chemical formula	C9H12N2O5
Molar mass	228.204 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

In a small study of mice with a defective Adenomatous polyposis coli gene, oral administration of zebularine to males had no effect on the overall methylation of DNA or the number of polyps, but in females the average number of polyps was reduced from 58 to 1.^[2] It has therefore been suggested for drug use as a prototype of epigenetic therapy for cancer chemoprevention.^[3]

Zebularine (left) closely resembles cytidine (right), but lacks the 4'-amino group.