Protein Information

Name calmodulin
Synonyms CALM; CAM; CALM 1; CALM 2; CALM 3; CALM1; CALM2; CALM3…

Compound Information

Name anthraquinone
CAS 9,10-anthracenedione

Reference List

PubMed Abstract RScore(About this table)
2155616 Matsuda Y, Nakanishi S, Nagasawa K, Kase H: Inhibition by new anthraquinone compounds, K-259-2 and KS-619-1, of calmodulin-dependent cyclic nucleotide phosphodiesterase. Biochem Pharmacol. 1990 Mar 1;39(5):841-9.

K-259-2 and KS-619-1, novel anionic anthraquinone metabolites isolated from culture broth of microorganisms, inhibited activation of bovine brain phosphodiesterase induced by calmodulin (CaM), sodium oleate, or limited proteolysis with almost equal potency.
113(1,2,2,3) Details
3680022 Matsuda Y, Kase H: KS-619-1, a new inhibitor of Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase from Streptomyces californicus. J Antibiot. 1987 Aug;40(8):1104-10.

KS-619-1 has an anthraquinone moiety.
4(0,0,0,4) Details
3680021 Yasuzawa T, Yoshida M, Shirahata K, Sano H: Structure of a novel Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase inhibitor K-259-2. J Antibiot. 1987 Aug;40(8):1101-3.

The structure of K-259-2, a potent inhibitor of Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase, was determined to be 3-(2Z-2-ethyl-2-butenyl)-1,6,8-trihydroxy-anthraquinone-2-carboxyl ic acid by chemical conversion and spectral studies.
32(0,1,1,2) Details
3680020 Matsuda Y, Asano K, Kawamoto I, Kase H: K-259-2, a new inhibitor of Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase from Micromonospora olivasterospora. J Antibiot. 1987 Aug;40(8):1092-100.

K-259-2 has an anthraquinone moiety in its structure.
4(0,0,0,4) Details
1466788 Jinsart W, Ternai B, Polya GM: Inhibition of myosin light chain kinase, cAMP-dependent protein kinase, protein kinase C and of plant Ca (2+)-dependent protein kinase by anthraquinones. Biol Chem Hoppe Seyler. 1992 Sep;373(9):903-10.

A variety of anthraquinone (anthracene-9,10-dione) derivatives inhibits rat brain Ca (2+)- and phospholipid-activated protein kinase C (PKC) of which the most potent inhibitors are mitoxantrone (1,4-dihydroxy-5,8-bis [2-(hydroxyethylamino)-ethylamino]-9,10- anthracenedione) (IC50 4 microM) and quinalizarin (1,2,5,8-tetrahydroxy-anthraquinone (IC50 4 microM).
Ca (2+)-calmodulin-dependent myosin light chain kinase (MLCK) is inhibited by a range of di-, tri- and tetrahydroxylated anthraquinones (IC50 values 2 to 53 microM), the most potent inhibitors being the more polar compounds, namely mitoxantrone (IC50 2 microM) and emodin (1,3,8-trihydroxy-6-methylanthraquinone) (IC50 8 microM).
2(0,0,0,2) Details
16386736 Zhang HL, Tang ZY, Yang JX, Zhang Y, Li Y, Lin Y: Bi-directional regulation of emodin and quercetin on smooth muscle myosin of gizzard. FEBS Lett. 2006 Jan 23;580(2):469-73. Epub 2005 Dec 22.

This study is to reveal the characteristics of bidirectional regulation of emodin (1,3,8-trihydroxy-6-methyl-anthraquinone) and quercetin on gizzard smooth muscle myosin.
Our results indicate that: (a) emodin demonstrates stimulatory effects, and quercetin produces inhibitory effects on myosin phosphorylation and Mg (2+)-ATPase activities of Ca (2+)/calmodulin-dependent phosphorylated myosin in a dose-dependent manner; (b) a combination of emodin and quercetin enhances phosphorylation and Mg (2+)-ATPase activities for partially phosphorylated myosin and inhibits those activities for fully phosphorylated myosin; (c) 1-(5-Chloronaphthalene-1-sulfonyl)-1H2-hexahydro-1,4-diazepine inhibits myosin phosphorylation in the presence of emodin and/or quercetin.
1(0,0,0,1) Details
9625728 Kumagai Y, Nakajima H, Midorikawa K, Homma-Takeda S, Shimojo N: Inhibition of nitric oxide formation by neuronal nitric oxide synthase by quinones: nitric oxide synthase as a quinone reductase. Chem Res Toxicol. 1998 Jun;11(6):608-13.


Reductase activity of PQ by purified nNOS required CaCl2/calmodulin and was markedly suppressed by the flavoprotein inhibitor diphenyleneiodonium but not by l-nitroarginine which is a specific inhibitor for NO formation. nNOS effectively reduced the quinones as well as PQ causing a marked decrease in the production of NO from l-arginine, while 1, 4-benzoquinone, 9,10-anthraquinone, mitomycin C, and lapachol, which show negligible inhibitory action on nNOS activity, were poor substrates for the enzyme on reduction.
0(0,0,0,0) Details