Calyculin A


CAS No. : 101932-71-2

Calyculin A,101932-71-2
Product Details
For research use only. Not Intended for Therapeutic Use!
Cat No:I000139
Synonyms:N-[(3S)-[4-(1E)-3-[(2R,3R,4R,7S,8S,9R)-2-[(1S,3S,4S,5R,7E,9E,11E,13Z)-14-Cyano-3,5-dihydroxy-1-methoxy-4,6,8,9,13-pentamethyl-7,9,11,13-tetradecatetraenyl]-9-hydroxy-4,4,8-trimethyl-3-(phosphonooxy)-1,6-dioxaspiro[4.5]dec-7-yl]-1-propenyl]-2-oxazoly]
Molecular Formula:C₅₀H₈₁N₄O₁₅P
Molecular Weight:1009.17
Target:Protein Ser/Thr Phosphatases
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Assay:≥99%
Appearance:A solid
Cat No:I000139
Cas No:101932-71-2
Product-Name:Calyculin A
MDL No:MFCD06795864
InChI:InChI=1S/C50H81N4O15P/c1-29(20-22-51)16-14-17-30(2)32(4)24-33(5)42(57)35(7)38(55)25-41(65-13)45-46(69-70(61,62)63)49(8,9)50(68-45)26-39(56)34(6)40(67-50)19-15-18-36-27-66-48(53-36)31(3)21-23-52-47(60)44(59)43(58)37(28-64-12)54(10)11/h14-18,20,24,27,31,33-
InChIKey:FKAWLXNLHHIHLA-UHFFFAOYSA-N
SMILES:CC1C(CC2(C(C(C(O2)C(CC(C(C)C(C(C)C=C(C)C(=CC=CC(=CC#N)C)C)O)O)OC)OP(=O)(O)O)(C)C)OC1CC=CC3=COC(=N3)C(C)CCNC(=O)C(C(C(COC)N(C)C)O)O)O

Calyculin A is a potent inhibitor of the catalytic subunit of type-2A phosphatase, with IC50 values of 0.5 to 1 nM.
Target: protein phosphatase
Calyculin A induces contraction in smooth muscle fibers. With the catalytic subunit of protein phosphatase type-1, calyculin A is an effective inhibitor , IC50 values for calyculin A is about 2 nM and. The endogenous phosphatase of smooth muscle myosin B was inhibited by calyculin A with IC50 values of 0.3 to 0.7 nM for calyculin A. The partially purified catalytic subunit from myosin B had IC50 values of 0.7 nM for calyculin A.


[1]. Ishihara H, et al. Calyculin A and okadaic acid: inhibitors of protein phosphatase activity. Biochem Biophys Res Commun. 1989 Mar 31;159(3):871-7.

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