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Details

Stereochemistry ABSOLUTE
Molecular Formula C14H16N2O3S
Molecular Weight 292.353
Optical Activity UNSPECIFIED
Defined Stereocenters 1 / 1
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of MONASTROL

SMILES

CCOC(=O)C1=C(C)NC(=S)N[C@H]1C2=CC(O)=CC=C2

InChI

InChIKey=LOBCDGHHHHGHFA-LBPRGKRZSA-N
InChI=1S/C14H16N2O3S/c1-3-19-13(18)11-8(2)15-14(20)16-12(11)9-5-4-6-10(17)7-9/h4-7,12,17H,3H2,1-2H3,(H2,15,16,20)/t12-/m0/s1

HIDE SMILES / InChI

Molecular Formula C14H16N2O3S
Molecular Weight 292.353
Charge 0
Count
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 1 / 1
E/Z Centers 0
Optical Activity UNSPECIFIED

Monastrol is a small, cell-permeable molecule that arrests cells in mitosis by specifically inhibiting Eg5, a member of the Kinesin-5 family. Monastrol has been used to probe the dynamic organization of the mitotic spindle. Monastrol inhibits both the basal and the microtubule-stimulated ATPase activity of the Eg5 motor domain. Unlike many ATPase inhibitors, monastrol does not compete with ATP binding to Eg5. Monastrol appears to inhibit microtubule-stimulated ADP release from Eg5 but does not compete with microtubule binding, suggesting that monastrol binds a novel allosteric site in the motor domain. (S)-monastrol, as compared to the (R)-enantiomer, is a more potent inhibitor of Eg5 activity in vitro and in vivo. As Monastrol, by specifically inhibiting kinesin Eg5, can cause mitotic arrest and monopolar spindle formation, it exhibits antitumor properties. Monastrol has being shown to be a potent inhibitor of pteridine reductase (PTR1) in Leishmania; it inhibits proliferation of amastigotes with an IC(50) (50% inhibitory concentration) of 10 uM in macrophage cultures infected with an L. donovani clinical isolate, with no host cytotoxicity. In experimental animals, oral administration of a 5 mg/kg dose of monastrol on two alternate days inhibits 50% of parasite growth, giving therapeutic backing to the use of monastrol as a potent antileishmanial in human VL cases.

Approval Year

PubMed

PubMed

TitleDatePubMed
Structure-activity relationship and multidrug resistance study of new S-trityl-L-cysteine derivatives as inhibitors of Eg5.
2011 Mar 24
Patents

Sample Use Guides

Syrian golden hamsters: oral administration of a 5 mg/kg dose of monastrol on two alternate days inhibits 50% of Leishmania donovani parasite growth.
Route of Administration: Oral
Monastrol reversibly inhibits microtubule motility in mammalian epithelial kidney cells (BS-C-1) driven by Eg5 in vitro. For the washout, Eg5-driven microtubule motility was measured in the presence of monastrol (200 uM), and then the assay chamber was depleted of compound and motility was immediately measured again. Monastrol inhibited Eg5-driven microtubule motility with an IC50 of 14 uM.
Substance Class Chemical
Created
by admin
on Sat Dec 16 10:01:20 GMT 2023
Edited
by admin
on Sat Dec 16 10:01:20 GMT 2023
Record UNII
6BSM97YZ8G
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
MONASTROL
MI  
Common Name English
(S)-MONASTROL
Common Name English
MONASTROL [MI]
Common Name English
MONASTROL, (+)-
Common Name English
5-PYRIMIDINECARBOXYLIC ACID, 1,2,3,4-TETRAHYDRO-4-(3-HYDROXYPHENYL)-6-METHYL-2-THIOXO-, ETHYL ESTER, (4S)-
Systematic Name English
(+)-MONASTROL
Common Name English
(4S)-MONASTROL
Common Name English
PILOCEREINE ETHYL ETHER [MI]
Common Name English
Code System Code Type Description
PUBCHEM
794323
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY
CAS
254753-54-3
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY
FDA UNII
6BSM97YZ8G
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY
EPA CompTox
DTXSID10388124
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY
MERCK INDEX
m7600
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY Merck Index
DRUG BANK
DB04331
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY
MERCK INDEX
m892
Created by admin on Sat Dec 16 10:01:20 GMT 2023 , Edited by admin on Sat Dec 16 10:01:20 GMT 2023
PRIMARY Merck Index