L-Chicoric acid - CAS 70831-56-0
Catalog number:
Not Intended for Therapeutic Use. For research use only.
Molecular Formula:
Molecular Weight:
Cichoric acid, that can be isolated from the herbs of Echinacea purpurea, is an inhibitor of human immunodeficiency virus type 1 (HIV-1) integrase in vitro.
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White powder
(2R,3R)-2,3-bis[[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy]butanedioic acid;
Soluble in DMSO
Store at -20 °C
Quality Standard:
Enterprise Standard
Shelf Life:
As supplied, 2 years from the QC date provided on the Certificate of Analysis, when stored properly
Canonical SMILES:
1.Mutagenesis of lysines 156 and 159 in human immunodeficiency virus type 1 integrase (IN) reveals differential interactions between these residues and different IN inhibitors.
Crosby DC, Lei X, Gibbs CG, Reinecke MG, Robinson WE Jr. Nat Prod Commun. 2015 Jan;10(1):117-24.
Human immunodeficiency virus (HIV) type I integrase (IN) active site, and viral DNA-binding residues K156 and K159 are predicted to interact both with strand transfer-selective IN inhibitors (STI), e.g. L-731,988, Elvitegravir (EVG), and the FDA-approved IN inhibitor, Raltegravir (RGV), and strand transfer non-selective inhibitors, e.g. dicaffeoyltartaric acids (DCTAs), e.g. L-chicoric acid (L-CA). To test posited roles for these two lysine residues in inhibitor action we assayed the potency of L-CA and several STI against a panel of K156 and K159 mutants. Mutagenesis of K156 conferred resistance to L-CA and mutagenesis of either K156 or K159 conferred resistance to STI indicating that the cationic charge at these two viral DNA-binding residues is important for inhibitor potency. IN K156N, a reported polymorphism associated with resistance to RGV, conferred resistance to L-CA and STI as well. To investigate the apparent preference L-CA exhibits for interactions with K156, we assayed the potency of several hybrid inhibitors containing combinations of DCTA and STI pharmacophores against recombinant IN K156A or K159A.
2.Preliminary mapping of a putative inhibitor-binding pocket for human immunodeficiency virus type 1 integrase inhibitors.
Lee DJ1, Robinson WE Jr. Antimicrob Agents Chemother. 2006 Jan;50(1):134-42.
Molecular modeling studies have identified a putative human immunodeficiency virus (HIV) integrase (IN) inhibitor-binding pocket for l-chicoric acid (l-CA) and other inhibitors of IN (C. A. Sotriffer, H. Ni, and A. McCammon, J. Med. Chem. 43:4109-4117, 2000). By using site-directed mutagenesis of several amino acid residues identified by modeling studies, a common inhibitor-binding pocket on IN was confirmed for l-CA and the diketo acid L-731,988. Specifically, the single mutations E92K, Q148A, K156A, K156R, G140S, and G149S, as well as the double mutations C65S-K156N and H67D-G140A were evaluated for their effects on enzymatic activity and inhibitor susceptibility. Each recombinant IN was attenuated for 3'-end processing and strand transfer activities. Most proteins were also attenuated for disintegration; the IN that contained K156R and C65S-K156N, however, displayed disintegration activity similar to that of IN from HIV(NL4-3). All mutant IN proteins demonstrated decreased susceptibility to l-CA, while all mutant proteins except E92K and K156R demonstrated resistance to L-731,988.
3.Catechol-substituted L-chicoric acid analogues as HIV integrase inhibitors.
Lee JY1, Yoon KJ, Lee YS. Bioorg Med Chem Lett. 2003 Dec 15;13(24):4331-4.
HIV integrase catalyzes the integration of HIV DNA copy into the host cell DNA, which is essential for the production of progeny viruses. L-Chicoric acid and dicaffeoylquinic acids, isolated from plants, are well known potent inhibitors of HIV integrase. The common structural features of these inhibitors are caffeic acid derivatives connected to tartaric acid or quinic acid through ester bonds. In the present study, we have synthesized and tested the inhibitory activities of a new type of HIV IN inhibitors, which has catechol groups in place of caffeoyl groups in the structure of L-chicoric acid. Upon substitution of catechol groups at succinic acid, pyrrole-dicarboxylic acid, maleimide or maleic anhydride, the inhibitory activities (IC(50)=3.8-23.6 microM) were retained or remarkably increased when compared to parent compound L-chicoric acid (IC(50)=13.7 microM).
4.Design, synthesis, and biological evaluation of novel hybrid dicaffeoyltartaric/diketo acid and tetrazole-substituted L-chicoric
Crosby DC1, Lei X, Gibbs CG, McDougall BR, Robinson WE, Reinecke MG. J Med Chem. 2010 Nov 25;53(22):8161-75. doi: 10.1021/jm1010594. Epub 2010 Oct 26.
Fourteen analogues of the anti-HIV-1 integrase (IN) inhibitor L-chicoric acid (L-CA) were prepared. Their IC(50) values for 3'-end processing and strand transfer against recombinant HIV-1 IN were determined in vitro, and their cell toxicities and EC(50) against HIV-1 were measured in cells (ex vivo). Compounds 1-6 are catechol/β-diketoacid hybrids, the majority of which exhibit submicromolar potency against 3'-end processing and strand transfer, though only with modest antiviral activities. Compounds 7-10 are L-CA/p-fluorobenzylpyrroloyl hybrids, several of which were more potent against strand transfer than 3'-end processing, a phenomenon previously attributed to the β-diketo acid pharmacophore. Compounds 11-14 are tetrazole bioisosteres of L-CA and its analogues, whose in vitro potencies were comparable to L-CA but with enhanced antiviral potency. The trihydroxyphenyl analogue 14 was 30-fold more potent than L-CA at relatively nontoxic concentrations.
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CAS 70831-56-0 L-Chicoric acid

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