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Tsybruk TV, Kaluzhskiy LA, Mezentsev YV, Makarieva TN, Tabakmaher KM, Ivanchina NV, Dmitrenok PS, Baranovsky AV, Gilep AA, Ivanov AS. Molecular Cloning, Heterologous Expression, Purification, and Evaluation of Protein-Ligand Interactions of CYP51 of Candida krusei Azole-Resistant Fungal Strain. Biomedicines 2023; 11:2873. [PMID: 38001874 PMCID: PMC10668980 DOI: 10.3390/biomedicines11112873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 11/26/2023] Open
Abstract
Due to the increasing prevalence of fungal diseases caused by fungi of the genus Candida and the development of pathogen resistance to available drugs, the need to find new effective antifungal agents has increased. Azole antifungals, which are inhibitors of sterol-14α-demethylase or CYP51, have been widely used in the treatment of fungal infections over the past two decades. Of special interest is the study of C. krusei CYP51, since this fungus exhibit resistance not only to azoles, but also to other antifungal drugs and there is no available information about the ligand-binding properties of CYP51 of this pathogen. We expressed recombinant C. krusei CYP51 in E. coli cells and obtained a highly purified protein. Application of the method of spectrophotometric titration allowed us to study the interaction of C. krusei CYP51 with various ligands. In the present work, the interaction of C. krusei CYP51 with azole inhibitors, and natural and synthesized steroid derivatives was evaluated. The obtained data indicate that the resistance of C. krusei to azoles is not due to the structural features of CYP51 of this microorganism, but rather to another mechanism. Promising ligands that demonstrated sufficiently strong binding in the micromolar range to C. krusei CYP51 were identified, including compounds 99 (Kd = 1.02 ± 0.14 µM) and Ch-4 (Kd = 6.95 ± 0.80 µM). The revealed structural features of the interaction of ligands with the active site of C. krusei CYP51 can be taken into account in the further development of new selective modulators of the activity of this enzyme.
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Affiliation(s)
- Tatsiana V. Tsybruk
- Institute of Bioorganic Chemistry NASB, 5 Building 2, V.F. Kuprevich Street, 220084 Minsk, Belarus; (A.V.B.); (A.A.G.)
| | - Leonid A. Kaluzhskiy
- Institute of Biomedical Chemistry, Pogodinskaya Str. 10 Building 8, 119121 Moscow, Russia; (L.A.K.); (Y.V.M.)
| | - Yuri V. Mezentsev
- Institute of Biomedical Chemistry, Pogodinskaya Str. 10 Building 8, 119121 Moscow, Russia; (L.A.K.); (Y.V.M.)
| | - Tatyana N. Makarieva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Pr. 100-let Vladivostoku 159, 690022 Vladivostok, Russia; (T.N.M.); (K.M.T.); (N.V.I.); (P.S.D.)
| | - Kseniya M. Tabakmaher
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Pr. 100-let Vladivostoku 159, 690022 Vladivostok, Russia; (T.N.M.); (K.M.T.); (N.V.I.); (P.S.D.)
| | - Natalia V. Ivanchina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Pr. 100-let Vladivostoku 159, 690022 Vladivostok, Russia; (T.N.M.); (K.M.T.); (N.V.I.); (P.S.D.)
| | - Pavel S. Dmitrenok
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Pr. 100-let Vladivostoku 159, 690022 Vladivostok, Russia; (T.N.M.); (K.M.T.); (N.V.I.); (P.S.D.)
| | - Alexander V. Baranovsky
- Institute of Bioorganic Chemistry NASB, 5 Building 2, V.F. Kuprevich Street, 220084 Minsk, Belarus; (A.V.B.); (A.A.G.)
| | - Andrei A. Gilep
- Institute of Bioorganic Chemistry NASB, 5 Building 2, V.F. Kuprevich Street, 220084 Minsk, Belarus; (A.V.B.); (A.A.G.)
- Institute of Biomedical Chemistry, Pogodinskaya Str. 10 Building 8, 119121 Moscow, Russia; (L.A.K.); (Y.V.M.)
| | - Alexis S. Ivanov
- Institute of Biomedical Chemistry, Pogodinskaya Str. 10 Building 8, 119121 Moscow, Russia; (L.A.K.); (Y.V.M.)
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Piven YA, Yastrebova MA, Khamidullina AI, Scherbakov AM, Tatarskiy VV, Rusanova JA, Baranovsky AV, Zinovich VG, Khlebnicova TS, Lakhvich FA. Novel O-acylated (E)-3-aryl-6,7-dihydrobenzisoxazol-4(5H)-one oximes targeting HSP90-HER2 axis in breast cancer cells. Bioorg Med Chem 2022; 53:116521. [PMID: 34844036 DOI: 10.1016/j.bmc.2021.116521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 01/04/2023]
Abstract
Novel O-acylated (E)-3-aryl-6,7-dihydrobenzisoxazol-4(5H)-one oximes were designed as potential HSP90 inhibitors. A series of the compounds was synthesized by oximation of (E)-3-aryl-6,7-dihydrobenzisoxazol-4(5H)-ones followed by O-acylation with acylamidobenzoic acids. The obtained compounds showed an antiproliferative effect on three breast cancer cell lines (MCF7, MDA-MB-231 and HCC1954). Compound 16s exhibited high antiproliferative potency against HCC1954 breast cancer cells with the IC50 value of 6 µM was selected for in-depth evaluation. Compound 16s did not inhibit the growth of normal epithelial cells. We have demonstrated that the compound 16s can induce apoptosis in cancer cells via inhibition of HSP90 "client" proteins including a key oncogenic receptor, HER2/neu. Described here compounds can be considered for further basic and preclinical investigation as a part of HSP90/HER2-targeted therapies.
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Affiliation(s)
- Yuri A Piven
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus
| | - Margarita A Yastrebova
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Vavilova st. 34/5, Moscow 119334, Russian Federation
| | - Alvina I Khamidullina
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Vavilova st. 34/5, Moscow 119334, Russian Federation
| | - Alexander M Scherbakov
- Department of Experimental Tumor Biology, Blokhin N.N. National Medical Research Center of Oncology, Kashirskoye sh. 24, Moscow 115522, Russian Federation
| | - Victor V Tatarskiy
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Vavilova st. 34/5, Moscow 119334, Russian Federation
| | - Julia A Rusanova
- Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska str., Kyiv 01601, Ukraine
| | - Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus
| | - Veronica G Zinovich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus
| | - Tatyana S Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus
| | - Fedor A Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus
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3
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Grabovec IP, Smolskaya SV, Baranovsky AV, Zhabinskii VN, Dichenko YV, Shabunya PS, Usanov SA, Strushkevich NV. Ligand-binding properties and catalytic activity of the purified human 24-hydroxycholesterol 7α-hydroxylase, CYP39A1. J Steroid Biochem Mol Biol 2019; 193:105416. [PMID: 31247323 DOI: 10.1016/j.jsbmb.2019.105416] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 12/01/2022]
Abstract
Oxysterols are derivatives of cholesterol and biologically active molecules that are involved in a number of functions, including cholesterol homeostasis, immune response, embryogenic development and pathophysiology of neurodegenerative diseases. Enzymes catalyzing their synthesis and metabolism are of particular interest as potential or evaluated drug targets. Here we report for the first time biochemical analysis of purified human oxysterol 7α-hydroxylase selective for 24-hydroxycholesterol. Binding analyses indicated a tight binding of the oxysterols and estrone. Ligand screening revealed that CYP39A1 binds with high affinity antifungal drugs and prostate cancer drug galeterone (TOK-001). Site-directed mutagenesis of conserved Asn residue in the active site revealed its crucial role for protein folding and heme incorporation. Developed protocol for expression and purification enables further investigation of this hepatic enzyme as off-target in development of specific drugs targeting cytochrome P450 enzymes.
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Affiliation(s)
- I P Grabovec
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - S V Smolskaya
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - A V Baranovsky
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - V N Zhabinskii
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - Y V Dichenko
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - P S Shabunya
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - S A Usanov
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus
| | - N V Strushkevich
- Institute of Bioorganic Chemistry NAS of Belarus, Minsk, Belarus.
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4
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Khlebnicova TS, Piven YA, Baranovsky AV, Lakhvich FA, Sorokina IV, Tolstikova TG. Fluorine-containing lupane triterpenoid acid derivatives: Design, synthesis and biological evaluation as potential anti-inflammatory agents. Steroids 2019; 147:62-69. [PMID: 30296549 DOI: 10.1016/j.steroids.2018.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/25/2018] [Accepted: 10/03/2018] [Indexed: 01/15/2023]
Abstract
A series of novel fluorine-containing lupane triterpenoid acid derivatives with fluoroaromatic amide moieties at the C-28 position (1-8) or with 2-(fluoroacyl)cyclopentane-1,3-dione fragments at the C-3 position (9-18) of lupane skeleton was synthesized. A simple synthesis of novel lupane triterpenoid hybrids with 2-(fluoroacyl)-2-cyclopenten-1-one moieties was developed. An interaction of 2-acyl-3-chlorocyclopent-2-en-1-ones, obtained from corresponding cyclic β-triketones, with methyl 3-amino-3-deoxybetulinate gave 3β-isomers (9-13) and 3α-isomers (14-18) of target hybrids, which were isolated as individual compounds. Anti-inflammatory properties of selected synthesized compounds were studied in vivo using the histamine-, concanavalin A- and sheep erythrocytes immunization-induced mouse paw edema models. The antioxidant activity was investigated in vivo on the model of tetracycline-induced hepatitis. Majority of synthesized fluorine-containing lupane triterpenoid acid derivatives exhibited significant anti-inflammatory and antioxidant effects. Among studied compounds, 3β-hybrid 11 with 2-perfluorobutanoyl-2-cyclopenten-1-one moiety was the most potent bioactive compound.
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Affiliation(s)
- Tatyana S Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus.
| | - Yuri A Piven
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Fedor A Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Iryna V Sorokina
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Acad. Lavrent'ev Ave. 9, 630090 Novosibirsk, Russian Federation
| | - Tatyana G Tolstikova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Acad. Lavrent'ev Ave. 9, 630090 Novosibirsk, Russian Federation
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5
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Khlebnicova TS, Piven' YA, Isakova VG, Baranovsky AV, Lakhvich FA, Sorochinsky AE, Gerus II. Regioselective Synthesis of Polyfluoroalkyl Substituted 6,7-Dihydrobenzisoxazolones. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tatyana S. Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus; Acad. Kuprevicha Street 5/2 220141 Minsk Belarus
| | - Yurii A. Piven'
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus; Acad. Kuprevicha Street 5/2 220141 Minsk Belarus
| | - Veronica G. Isakova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus; Acad. Kuprevicha Street 5/2 220141 Minsk Belarus
| | - Alexander V. Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus; Acad. Kuprevicha Street 5/2 220141 Minsk Belarus
| | - Fedor A. Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus; Acad. Kuprevicha Street 5/2 220141 Minsk Belarus
| | - Alexander E. Sorochinsky
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine; Murmanska 1 02660 Kiev 94 Ukraine
| | - Igor I. Gerus
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine; Murmanska 1 02660 Kiev 94 Ukraine
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6
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Khlebnicova TS, Piven YA, Baranovsky AV, Lakhvich FA, Shishkina SV, Zicāne D, Tetere Z, Rāviņa I, Kumpiņš V, Rijkure I, Mieriņa I, Peipiņš U, Turks M. Synthesis of novel lupane triterpenoid-indazolone hybrids with oxime ester linkage. Steroids 2017; 117:77-89. [PMID: 27500691 DOI: 10.1016/j.steroids.2016.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/29/2016] [Accepted: 08/02/2016] [Indexed: 01/11/2023]
Abstract
An efficient protocol for the synthesis of novel lupane triterpenoid-indazolone hybrids with oxime ester linkage has been developed from naturally accessible precursor betulin. For the first time a series of betulonic acid-indazolone hybrids have been synthesized via an acylation of corresponding 6,7-dihydro-1H-indazol-4(5H)-one oximes with betulonic acid chloride. Diastereoselective reduction of the obtained betulonic acid conjugates with NaBH4 resulted in a formation of betulinic acid-indazolone hybrids in excellent yields. The configuration of the key compounds has been fully established by X-ray and 2D NMR analysis.
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Affiliation(s)
- Tatyana S Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Yuri A Piven
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Fedor A Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Svetlana V Shishkina
- Institute for Single Crystals, National Academy of Sciences of Ukraine, pr. Lenina 60, Kharkiv 61001, Ukraine
| | - Daina Zicāne
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Zenta Tetere
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Irisa Rāviņa
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Viktors Kumpiņš
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Inese Rijkure
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Inese Mieriņa
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Uldis Peipiņš
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia.
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Bozhok TS, Sivets GG, Baranovsky AV, Kalinichenko EN. Synthesis of novel 6-substituted thymine ribonucleosides and their 3′-fluorinated analogues. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Baranovsky AV, Bolibrukh DA, Schneider B. Solvolysis of 14,17-etheno-bridged 16α-nitroestratrienyl acetate and lactam formation pathways studied by LC-NMR and LC-MS. Structures of minor products. Steroids 2015; 104:37-48. [PMID: 26296334 DOI: 10.1016/j.steroids.2015.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 08/15/2015] [Indexed: 11/17/2022]
Abstract
The ethanol solvolysis of 3-methoxy-14,17-etheno-16α-nitroestra-1,3,5(10)-trien-17β-yl acetate in the presence of NaHCO3 was studied by means of real-time NMR experiments, LC-SPE-NMR, and LC-MS. The pathway to form 3-methoxy-2'-oxopyrrolidino-[4',5':14β,15β]-estra-1,3,5(10)-trien-17-one was disclosed. The intermediacy of nitrile oxide and alkoxynitrone was postulated based on the analysis of the reaction products. The proposed mechanism of cleaving the bridge in the nitro compound is legal for the formation of N-acetoxylactams, nitriles, isoxazoles and isoxazolines.
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Affiliation(s)
- Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Str. 5/2, 220143 Minsk, Belarus.
| | - Dmitry A Bolibrukh
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Str. 5/2, 220143 Minsk, Belarus
| | - Bernd Schneider
- Max Planck Institute for Chemical Ecology, Beutenberg Campus, Hans Knöll Str. 8, D-07745 Jena, Germany
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Pradko AG, Litvinovskaya RP, Sauchuk AL, Drach SV, Baranovsky AV, Zhabinskii VN, Mirantsova TV, Khripach VA. A new ELISA for quantification of brassinosteroids in plants. Steroids 2015; 97:78-86. [PMID: 25201263 DOI: 10.1016/j.steroids.2014.08.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 08/01/2014] [Accepted: 08/22/2014] [Indexed: 11/25/2022]
Abstract
Starting from (22R,23R)-2α,3α,22,23,26-pentahydroxy-5α-cholestan-6-one 26-hemisuccinate, conjugates of 28-norcastasterone with horse radish peroxidase and bovine serum albumin were prepared. The latter conjugate was injected into rabbits; produced polyclonal antibodies were used to quantitate 6-keto-brassinosteroids. The newly developed analytical system was used in combination with two other immunoenzymatic assays for brassinosteroids to determine individual compounds of this series. In addition, a direct method of brassinosteroid analysis was proposed. It has the advantage of requiring no sample pretreatment steps such as extraction with organic solvents and chromatography.
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Affiliation(s)
| | - Raisa P Litvinovskaya
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus
| | - Alina L Sauchuk
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus
| | - Svetlana V Drach
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus
| | - Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus
| | - Vladimir N Zhabinskii
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus
| | | | - Vladimir A Khripach
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich St., 5/2, 220141 Minsk, Belarus.
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10
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Fomich MA, Kvach MV, Navakouski MJ, Weise C, Baranovsky AV, Korshun VA, Shmanai VV. Azide phosphoramidite in direct synthesis of azide-modified oligonucleotides. Org Lett 2014; 16:4590-3. [PMID: 25156193 DOI: 10.1021/ol502155g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Azide and phosphoramidite functions were found to be compatible within one molecule and stable for months in solution kept frozen at -20 °C. An azide-carrying phosphoramidite was used for direct introduction of multiple azide modifications into synthetic oligonucleotides. A series of azide-containing oligonucleotides were modified further using click reactions with alkynes.
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Affiliation(s)
- Maksim A Fomich
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus , Surganova 13, 220072 Minsk, Belarus
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11
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Yantsevich AV, Dichenko YV, Mackenzie F, Mukha DV, Baranovsky AV, Gilep AA, Usanov SA, Strushkevich NV. Human steroid and oxysterol 7α-hydroxylase CYP7B1: substrate specificity, azole binding and misfolding of clinically relevant mutants. FEBS J 2014; 281:1700-13. [PMID: 24491228 DOI: 10.1111/febs.12733] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 12/23/2013] [Accepted: 01/28/2014] [Indexed: 11/28/2022]
Abstract
Oxysterols and neurosteroids are important signaling molecules produced by monooxygenases of the cytochrome P450 family that realize their effect through nuclear receptors. CYP7B1 catalyzes the 6- or 7-hydroxylation of both steroids and oxysterols and thus is involved in the metabolism of neurosteroids and bile acid synthesis, respectively. The dual physiological role of CYP7B1 is evidenced from different diseases, liver failure and progressive neuropathy, caused by enzyme malfunction. Here we present biochemical characterization of CYP7B1 at the molecular level to understand substrate specificity and susceptibility to azole drugs. Based on our experiments with purified enzyme, the requirements for CYP7B1 hydroxylation of steroid molecules are as follows: C5 hydrogen in the α-configuration (or double bond at C5), a polar group at C17, a hydroxyl group at C3, and the absence of the hydroxyl group at C20-C24 in the C27-sterol side chain. 21-hydroxy-pregnenolone was identified as a new substrate, and overall low activity toward pregnanes could be related to the increased potency of 7-hydroxy derivatives produced by CYP7B1. Metabolic conversion (deactivation) of oxysterols by CYP7B1 in a reconstituted system proceeds via two sequential hydroxylations. Two mutations that are found in patients with diseases, Gly57Arg and Phe216Ser, result in apo-P450 (devoid of heme) protein formation. Our CYP7B1 homology model provides a rationale for understanding clinical mutations and relatively broad substrate specificity for steroid hydroxylase.
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12
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Baranovsky AV, Bolibrukh DA, Khripach VA, Schneider B. Diels-Alder reaction of androsta-14,16-dien-17-yl acetates with nitroethylene: product distribution and selected adduct transformations. Steroids 2013; 78:282-7. [PMID: 23261956 DOI: 10.1016/j.steroids.2012.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 11/14/2012] [Accepted: 11/21/2012] [Indexed: 11/30/2022]
Abstract
The Diels-Alder cycloaddition of nitroethylene to some androsta-14,16-dien-17-yl acetates has been studied. The addition occurs stereoselectively, giving predominantly head-to-head-adduct. 14β-Cyanomethyl steroids were obtained via the reductive cleavage reaction of bridged nitro compounds. The structures of the new compounds have been fully characterized by 2D NMR and tandem mass-spectrometry methods.
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Affiliation(s)
- Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Minsk, Belarus.
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Baranovsky AV, Bolibrukh DA, Bull JR, Lyakhov AS, Khripach VA. Synthesis and molecular structure of 14,15-pyrrolidino-and 14,16-ethano derivatives of estrone. Steroids 2008; 73:585-93. [PMID: 18325556 DOI: 10.1016/j.steroids.2008.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2007] [Revised: 12/20/2007] [Accepted: 01/09/2008] [Indexed: 10/22/2022]
Abstract
Hydrolysis of 3-methoxy-16alpha-nitro-14,17-ethenoestra-1,3,5(10)-trien-17beta-yl acetate under weakly basic conditions leads to formation of 3-methoxy-2'-oxopyrrolidino-[4',5':14beta,15beta]-estra-1,3,5 (10)-trien-17-one, the structure of which has been confirmed by X-ray analysis and some chemical transformations. The reactivity of 3-methoxy-16alpha-nitro-14,17-ethanoestra-1,3,5(10)-trien-17beta-yl acetate under various conditions of basic hydrolysis has been investigated. The derived compounds have been identified by means of NMR spectroscopy and X-ray analysis.
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Affiliation(s)
- Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich str. 5/2, 220143 Minsk, Belarus.
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Baranovsky AV, Bolibrukh DA, Khripach VA, Schneider B. A new approach to heterocycle-modified steroids via nitrile oxide intermediates. ARKIVOC 2008. [DOI: 10.3998/ark.5550190.0009.904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Baranovsky AV, Bolibrukh DA, Bull JR. Synthesis of 3-Methoxy-16α-nitro-14,17-ethenoestra-1,3,5(10)-trien-17β-yl Acetate and Fragmentation-Mediated Pathways to 14β,15β-FusedN-Heterocycles and 14β-Functionalised Alkyl Derivatives. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600629] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cherviakovsky EM, Bolibrukh DA, Baranovsky AV, Vlasova TM, Kurchenko VP, Gilep AA, Usanov SA. Oxidative modification of quercetin by hemeproteins. Biochem Biophys Res Commun 2006; 342:459-64. [PMID: 16487485 DOI: 10.1016/j.bbrc.2006.02.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Accepted: 02/01/2006] [Indexed: 11/29/2022]
Abstract
The ability of a number of hemeproteins to oxidize the flavonoid quercetin has been shown. It was found that quercetin undergoes chemical modification in the presence of cytochrome c, myoglobin, and hemoglobin but not cytochrome b(5). In the range of investigated proteins the most effective oxidant appears to be cytochrome c. Chromatographic analysis of the reaction mixture revealed a number of quercetin oxidation products. The main oxidation product was purified and characterized by means of LC-MS and NMR analyses. It has a dimeric structure similar to the product of quercetin oxidation by horseradish peroxidase and is formed during radical-driven reactions. Our results indicate that a number of hemeproteins can react and modify biologically active flavonoids. However, these reactions might also lead to the generation of active species with deleterious consequences for the cellular macromolecules.
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Affiliation(s)
- Egor M Cherviakovsky
- Institute of Bioorganic Chemistry, Academy of Sciences of Belarus, Kuprevicha st., 5/2, Minsk 220141, Belarus
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Baranovsky AV, Groen MB, Groot AD, Litvinovskaya RP, Khripach VA. Synthesis of 17β-Isoxazolyl Steroids and Spiro[steroid-17,2'-furanone]s. ACTA ACUST UNITED AC 1998. [DOI: 10.1135/cccc19981564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Synthesis of 17β-isoxazolyl steroids and their transformations into the corresponding spiro[steroid-17,2'-furanone]s are described. The reaction sequence consists of the 1,3-dipolar cycloaddition of a nitrile oxide to mestrenol, dehydration, epoxidation or dihydroxylation, cleavage of the isoxazole moiety and cyclization of intermediate enamino ketones.
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