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Agafonova I, Chingizova E, Chaikina E, Menchinskaya E, Kozlovskiy S, Likhatskaya G, Sabutski Y, Polonik S, Aminin D, Pislyagin E. Protection Activity of 1,4-Naphthoquinones in Rotenone-Induced Models of Neurotoxicity. Mar Drugs 2024; 22:62. [PMID: 38393033 PMCID: PMC10890484 DOI: 10.3390/md22020062] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
The MTS cell viability test was used to screen a mini library of natural and synthetic 1,4-naphthoquinone derivatives (1,4-NQs) from marine sources. This screening identified two highly effective compounds, U-443 and U-573, which showed potential in protecting Neuro-2a neuroblastoma cells from the toxic effects of rotenone in an in vitro model of neurotoxicity. The selected 1,4-NQs demonstrated the capability to reduce oxidative stress by decreasing the levels of reactive oxygen species (ROS) and nitric oxide (NO) in Neuro-2a neuroblastoma cells and RAW 264.7 macrophage cells and displayed significant antioxidant properties in mouse brain homogenate. Normal mitochondrial function was restored and the mitochondrial membrane potential was also regained by 1,4-NQs after exposure to neurotoxins. Furthermore, at low concentrations, these compounds were found to significantly reduce levels of proinflammatory cytokines TNF and IL-1β and notably inhibit the activity of cyclooxygenase-2 (COX-2) in RAW 264.7 macrophages. The results of docking studies showed that the 1,4-NQs were bound to the active site of COX-2, analogically to a known inhibitor of this enzyme, SC-558. Both substances significantly improved the behavioral changes in female CD1 mice with rotenone-induced early stage of Parkinson's disease (PD) in vivo. It is proposed that the 1,4-NQs, U-443 and U-573, can protect neurons and microglia through their potent anti-ROS and anti-inflammatory activities.
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Affiliation(s)
- Irina Agafonova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Ekaterina Chingizova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Elena Chaikina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Ekaterina Menchinskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Sergey Kozlovskiy
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Galina Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Yuri Sabutski
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Sergey Polonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
| | - Dmitry Aminin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, No. 100, Shin-Chuan 1st Road, Sanmin District, Kaohsiung City 80708, Taiwan
| | - Evgeny Pislyagin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (I.A.); (E.C.); (E.C.); (E.M.); (S.K.); (G.L.); (Y.S.); (S.P.); (D.A.)
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Kozlovskiy S, Pislyagin E, Menchinskaya E, Chingizova E, Kaluzhskiy L, Ivanov AS, Likhatskaya G, Agafonova I, Sabutski Y, Polonik S, Manzhulo I, Aminin D. Tetracyclic 1,4-Naphthoquinone Thioglucoside Conjugate U-556 Blocks the Purinergic P2X7 Receptor in Macrophages and Exhibits Anti-Inflammatory Activity In Vivo. Int J Mol Sci 2023; 24:12370. [PMID: 37569745 PMCID: PMC10418395 DOI: 10.3390/ijms241512370] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/21/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
P2X7 receptors (P2X7Rs) are ligand-gated ion channels that play a significant role in inflammation and are considered a potential therapeutic target for some inflammatory diseases. We have previously shown that a number of synthetic 1,4-naphthoquinones are capable of blocking P2X7Rs in neuronal and macrophage cells. In the present investigation, we have demonstrated the ability of the tetracyclic quinone-thioglucoside conjugate U-556, derived from 1,4-naphthoquinone thioglucoside, to inhibit ATP-induced Ca2+ influx and YO-PRO-1 dye uptake, which indicates blocking P2X7R in RAW 264.7 macrophages. This process was accompanied by the inhibition of ATP-induced reactive oxygen species production in macrophages, as well as the macrophage survival strengthening under ATP toxic effects. Nevertheless, U-556 had no noticeable antioxidant capacity. Naphthoquinone-thioglucoside conjugate U-556 binding to the extracellular part of the P2X7R was confirmed by SPR analysis, and the kinetic characteristics of this complex formation were established. Computer modeling predicted that U-556 binds the P2X7R allosteric binding site, topographically similar to that of the specific A438079 blocker. The study of biological activity in in vivo experiments shows that tetracylic conjugate significantly reduces inflammation provoked by carrageenan. The data obtained points out that the observed physiological effects of U-556 may be due to its ability to block the functioning of the P2X7R.
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Affiliation(s)
- Sergei Kozlovskiy
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Evgeny Pislyagin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Ekaterina Menchinskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Ekaterina Chingizova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Leonid Kaluzhskiy
- V.N. Orekhovich Institute of Biomedical Chemistry, 119121 Moscow, Russia; (L.K.); (A.S.I.)
| | - Alexis S. Ivanov
- V.N. Orekhovich Institute of Biomedical Chemistry, 119121 Moscow, Russia; (L.K.); (A.S.I.)
| | - Galina Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Irina Agafonova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Yuri Sabutski
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Sergey Polonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
| | - Igor Manzhulo
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch of the Russian Academy of Science, 690041 Vladivostok, Russia;
| | - Dmitry Aminin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Science, 690022 Vladivostok, Russia; (S.K.); (E.P.); (E.M.); (E.C.); (G.L.); (I.A.); (Y.S.); (S.P.)
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Bakunina I, Imbs T, Likhatskaya G, Grigorchuk V, Zueva A, Malyarenko O, Ermakova S. Effect of Phlorotannins from Brown Algae Costaria costata on α- N-Acetylgalactosaminidase Produced by Duodenal Adenocarcinoma and Melanoma Cells. Mar Drugs 2022; 21:33. [PMID: 36662206 PMCID: PMC9860849 DOI: 10.3390/md21010033] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
The inhibitor of human α-N-acetylgalactosaminidase (α-NaGalase) was isolated from a water-ethanol extract of the brown algae Costaria costata. Currently, tumor α-NaGalase is considered to be a therapeutic target in the treatment of cancer. According to NMR spectroscopy and mass spectrometric analysis, it is a high-molecular-weight fraction of phlorethols with a degree of polymerization (DP) equaling 11-23 phloroglucinols (CcPh). It was shown that CcPh is a direct inhibitor of α-NaGalases isolated from HuTu 80 and SK-MEL-28 cells (IC50 0.14 ± 0.008 and 0.12 ± 0.004 mg/mL, respectively) and reduces the activity of this enzyme in HuTu 80 and SK-MEL-28 cells up to 50% at concentrations of 15.2 ± 9.5 and 5.7 ± 1.6 μg/mL, respectively. Molecular docking of the putative DP-15 oligophlorethol (P15OPh) and heptaphlorethol (PHPh) with human α-NaGalase (PDB ID 4DO4) showed that this compound forms a complex and interacts directly with the Asp 156 and Asp 217 catalytic residues of the enzyme in question. Thus, brown algae phlorethol CcPh is an effective marine-based natural inhibitor of the α-NaGalase of cancer cells and, therefore, has high therapeutic potential.
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Affiliation(s)
- Irina Bakunina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Tatiana Imbs
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Galina Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Valeria Grigorchuk
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Anastasya Zueva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Olesya Malyarenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
| | - Svetlana Ermakova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 Pr-t 100-let Vladivostoka Str., 690022 Vladivostok, Russia
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Utkina N, Likhatskaya G, Malyarenko O, Ermakova S, Balabanova L, Slepchenko L, Bakunina I. Effects of Sponge-Derived Alkaloids on Activities of the Bacterial α-D-Galactosidase and Human Cancer Cell α-N-Acetylgalactosaminidase. Biomedicines 2021; 9:biomedicines9050510. [PMID: 34063022 PMCID: PMC8147984 DOI: 10.3390/biomedicines9050510] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 04/30/2021] [Accepted: 05/02/2021] [Indexed: 11/30/2022] Open
Abstract
During a search for glycosidase inhibitors among marine natural products, we applied an integrated in vitro and in silico approach to evaluate the potency of some aaptamines and makaluvamines isolated from marine sponges on the hydrolyzing activity of α-N-acetylgalactosaminidase (α-NaGalase) from human cancer cells and the recombinant α-D-galactosidase (α-PsGal) from a marine bacterium Pseudoalteromonas sp. KMM 701. These alkaloids showed no direct inhibitory effect on the cancer α-NaGalase; but isoaaptamine (2), 9-demethylaaptamine (3), damirone B (6), and makaluvamine H (7) reduced the expression of the enzyme in the human colorectal adenocarcinoma cell line DLD-1 at 5 μM. Isoaaptamine (2), 9-demethylaaptamine (3), makaluvamine G (6), and zyzzyanone A (7) are slow-binding irreversible inhibitors of the bacterial α-PsGal with the inactivation rate constants (kinact) 0.12 min−1, 0.092 min−1, 0.079 min−1, and 0.037 min−1, as well as equilibrium inhibition constants (Ki) 2.70 µM, 300 µM, 411 µM, and 105 µM, respectively. Docking analysis revealed that these alkaloids bind in a pocket close to the catalytic amino acid residues Asp451 and Asp516 and form complexes, due to π-π interactions with the Trp308 residue and hydrogen bonds with the Lys449 residue. None of the studied alkaloids formed complexes with the active site of the human α-NaGalase.
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Affiliation(s)
| | | | | | | | | | | | - Irina Bakunina
- Correspondence: ; Tel.: +7-(432)-231-07-05-(3); Fax: +7-(432)-231-07-05-(7)
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Chernysheva N, Bystritskaya E, Likhatskaya G, Nedashkovskaya O, Isaeva M. Genome-Wide Analysis of PL7 Alginate Lyases in the Genus Zobellia. Molecules 2021; 26:2387. [PMID: 33924031 PMCID: PMC8073546 DOI: 10.3390/molecules26082387] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 04/15/2021] [Indexed: 12/04/2022] Open
Abstract
We carried out a detailed investigation of PL7 alginate lyases across the Zobellia genus. The main findings were obtained using the methods of comparative genomics and spatial structure modeling, as well as a phylogenomic approach. Initially, in order to elucidate the alginolytic potential of Zobellia, we calculated the content of polysaccharide lyase (PL) genes in each genome. The genus-specific PLs were PL1, PL6, PL7 (the most abundant), PL14, PL17, and PL40. We revealed that PL7 belongs to subfamilies 3, 5, and 6. They may be involved in local and horizontal gene transfer and gene duplication processes. Most likely, an individual evolution of PL7 genes promotes the genetic variability of the Alginate Utilization System across Zobellia. Apparently, the PL7 alginate lyases may acquire a sub-functionalization due to diversification between in-paralogs.
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Affiliation(s)
| | | | | | | | - Marina Isaeva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159, Pr. 100 let Vladivostoku, 690022 Vladivostok, Russia; (N.C.); (E.B.); (G.L.); (O.N.)
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Polonik S, Likhatskaya G, Sabutski Y, Pelageev D, Denisenko V, Pislyagin E, Chingizova E, Menchinskaya E, Aminin D. Synthesis, Cytotoxic Activity Evaluation and Quantitative Structure-Activity Analysis of Substituted 5,8-Dihydroxy-1,4-Naphthoquinones and their O- and S-Glycoside Derivatives Tested Against Neuro-2a Cancer Cells. Mar Drugs 2020; 18:E602. [PMID: 33260299 PMCID: PMC7761386 DOI: 10.3390/md18120602] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023] Open
Abstract
Based on 6,7-substituted 2,5,8-trihydroxy-1,4-naphtoquinones (1,4-NQs) derived from sea urchins, five new acetyl-O-glucosides of NQs were prepared. A new method of conjugation of per-O-acetylated 1-mercaptosaccharides with 2-hydroxy-1,4-NQs through a methylene spacer was developed. Methylation of 2-hydroxy group of quinone core of acetylthiomethylglycosides by diazomethane and deacetylation of sugar moiety led to 28 new thiomethylglycosidesof 2-hydroxy- and 2-methoxy-1,4-NQs. The cytotoxic activity of starting 1,4-NQs (13 compounds) and their O- and S-glycoside derivatives (37 compounds) was determined by the MTT method against Neuro-2a mouse neuroblastoma cells. Cytotoxic compounds with EC50 = 2.7-87.0 μM and nontoxic compounds with EC50 > 100 μM were found. Acetylated O- and S-glycosides 1,4-NQs were the most potent, with EC50 = 2.7-16.4 μM. Methylation of the 2-OH group innaphthoquinone core led to a sharp increase in the cytotoxic activity of acetylated thioglycosidesof NQs, which was partially retained for their deacetylated derivatives. Thiomethylglycosides of 2-hydroxy-1,4-NQs with OH and MeO groups in quinone core at positions 6 and 7, resprectively formed a nontoxic set of compounds with EC50 > 100 μM. A quantitative structure-activity relationship (QSAR) model of cytotoxic activity of 22 1,4-NQ derivatives was constructed and tested. Descriptors related to the cytotoxic activity of new 1,4-NQ derivatives were determined. The QSAR model is good at predicting the activity of 1,4-NQ derivatives which are unused for QSAR models and nontoxic derivatives.
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Affiliation(s)
- Sergey Polonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Galina Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Yuri Sabutski
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Dmitry Pelageev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
- School of Natural Sciences, Far Eastern Federal University, Sukhanova St. 8, 690091 Vladivostok, Russia
| | - Vladimir Denisenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Evgeny Pislyagin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Ekaterina Chingizova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Ekaterina Menchinskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
| | - Dmitry Aminin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry of Far Eastern Branch of Russian Academy of Sciences, Prospekt 100-let Vladivostoku, 159, 690022 Vladivostok, Russia; (S.P.); (G.L.); (Y.S.); (D.P.); (V.D.); (E.P.); (E.C.); (E.M.)
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
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Luzina O, Filimonov A, Zakharenko A, Chepanova A, Zakharova O, Ilina E, Dyrkheeva N, Likhatskaya G, Salakhutdinov N, Lavrik O. Usnic Acid Conjugates with Monoterpenoids as Potent Tyrosyl-DNA Phosphodiesterase 1 Inhibitors. J Nat Prod 2020; 83:2320-2329. [PMID: 32786885 DOI: 10.1021/acs.jnatprod.9b01089] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hybrid molecules created from different pharmacophores of natural and synthetic equivalents are successfully used in pharmaceutical practice. One promising target for anticancer therapy is tyrosyl-DNA phosphodiesterase 1 (Tdp1) because it can repair DNA lesions caused by DNA-topoisomerase 1 (Top1) inhibitors, resulting in drug resistance. In this study, new hybrid compounds were synthesized by combining the pharmacophoric moiety of a set of natural compounds with inhibitory properties against Tdp1, particularly, phenolic usnic acid and a set of different monoterpenoid fragments. These fragments were connected through a hydrazinothiazole linker. The inhibitory properties of the new compounds mainly depended on the structure of the terpenoid moieties. The two most potent compounds, 9a and 9b, were synthesized from citral and citronellal, which contain acyclic fragments with IC50 values in the range of 10-16 nM. Some synthesized derivatives showed low cytotoxicity against HeLa cells and increased the effect of the Top1 inhibitor topotecan in vitro by three to seven times. These derivatives may be considered as potential agents for the development of anticancer therapies when combined with Top1 inhibitors.
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Affiliation(s)
- Olga Luzina
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Alexander Filimonov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
- Novosibirsk State University, Novosibirsk, 630090, Russian Federation
| | - Alexandra Zakharenko
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Arina Chepanova
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Olga Zakharova
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Ekaterina Ilina
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Nadezhda Dyrkheeva
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
| | - Galina Likhatskaya
- Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, 690022, Russian Federation
| | - Nariman Salakhutdinov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
- Novosibirsk State University, Novosibirsk, 630090, Russian Federation
| | - Olga Lavrik
- Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
- Novosibirsk State University, Novosibirsk, 630090, Russian Federation
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Bakunina I, Likhatskaya G, Slepchenko L, Balabanova L, Tekutyeva L, Son O, Shubina L, Makarieva T. Effect of Pentacyclic Guanidine Alkaloids from the Sponge Monanchora pulchra on Activity of α-Glycosidases from Marine Bacteria. Mar Drugs 2019; 17:E22. [PMID: 30609674 PMCID: PMC6356649 DOI: 10.3390/md17010022] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/09/2018] [Accepted: 12/25/2018] [Indexed: 12/12/2022] Open
Abstract
The effect of monanchomycalin B, monanhocicidin A, and normonanhocidin A isolated from the Northwest Pacific sample of the sponge Monanchora pulchra was investigated on the activity of α-galactosidase from the marine γ-proteobacterium Pseudoalteromonas sp. KMM 701 (α-PsGal), and α-N-acetylgalactosaminidase from the marine bacterium Arenibacter latericius KMM 426T (α-NaGa). All compounds are slow-binding irreversible inhibitors of α-PsGal, but have no effect on α-NaGa. A competitive inhibitor d-galactose protects α-PsGal against the inactivation. The inactivation rate (kinact) and equilibrium inhibition (Ki) constants of monanchomycalin B, monanchocidin A, and normonanchocidin A were 0.166 ± 0.029 min-1 and 7.70 ± 0.62 μM, 0.08 ± 0.003 min-1 and 15.08 ± 1.60 μM, 0.026 ± 0.000 min-1, and 4.15 ± 0.01 μM, respectively. The 2D-diagrams of α-PsGal complexes with the guanidine alkaloids were constructed with "vessel" and "anchor" parts of the compounds. Two alkaloid binding sites on the molecule of α-PsGal are shown. Carboxyl groups of the catalytic residues Asp451 and Asp516 of the α-PsGal active site interact with amino groups of "anchor" parts of the guanidine alkaloid molecules.
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Affiliation(s)
- Irina Bakunina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Galina Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Lubov Slepchenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
- Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Larissa Balabanova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
- Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Liudmila Tekutyeva
- Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Oksana Son
- Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Larisa Shubina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Tatyana Makarieva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
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Bakunina I, Slepchenko L, Anastyuk S, Isakov V, Likhatskaya G, Kim N, Tekutyeva L, Son O, Balabanova L. Characterization of Properties and Transglycosylation Abilities of Recombinant α-Galactosidase from Cold-Adapted Marine Bacterium Pseudoalteromonas KMM 701 and Its C494N and D451A Mutants. Mar Drugs 2018; 16:E349. [PMID: 30250010 PMCID: PMC6213131 DOI: 10.3390/md16100349] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 12/03/2022] Open
Abstract
A novel wild-type recombinant cold-active α-d-galactosidase (α-PsGal) from the cold-adapted marine bacterium Pseudoalteromonas sp. KMM 701, and its mutants D451A and C494N, were studied in terms of their structural, physicochemical, and catalytic properties. Homology models of the three-dimensional α-PsGal structure, its active center, and complexes with D-galactose were constructed for identification of functionally important amino acid residues in the active site of the enzyme, using the crystal structure of the α-galactosidase from Lactobacillus acidophilus as a template. The circular dichroism spectra of the wild α-PsGal and mutant C494N were approximately identical. The C494N mutation decreased the efficiency of retaining the affinity of the enzyme to standard p-nitrophenyl-α-galactopiranoside (pNP-α-Gal). Thin-layer chromatography, matrix-assisted laser desorption/ionization mass spectrometry, and nuclear magnetic resonance spectroscopy methods were used to identify transglycosylation products in reaction mixtures. α-PsGal possessed a narrow acceptor specificity. Fructose, xylose, fucose, and glucose were inactive as acceptors in the transglycosylation reaction. α-PsGal synthesized -α(1→6)- and -α(1→4)-linked galactobiosides from melibiose as well as -α(1→6)- and -α(1→3)-linked p-nitrophenyl-digalactosides (Gal₂-pNP) from pNP-α-Gal. The D451A mutation in the active center completely inactivated the enzyme. However, the substitution of C494N discontinued the Gal-α(1→3)-Gal-pNP synthesis and increased the Gal-α(1→4)-Gal yield compared to Gal-α(1→6)-Gal-pNP.
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Affiliation(s)
- Irina Bakunina
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Lubov Slepchenko
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
- School of Economics and Management, School of Natural Sciences of Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Stanislav Anastyuk
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Vladimir Isakov
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Galina Likhatskaya
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Natalya Kim
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Liudmila Tekutyeva
- School of Economics and Management, School of Natural Sciences of Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Oksana Son
- School of Economics and Management, School of Natural Sciences of Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
| | - Larissa Balabanova
- Laboratory of Enzyme Chemistry, Laboratory of Marine Biochemistry, Laboratory of Bioassays and Mechanism of action of Biologically Active Substances, Laboratory of Instrumental and Radioisotope Testing Methods, Group of NMR-Spectroscopy of G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690022, Russia.
- School of Economics and Management, School of Natural Sciences of Far Eastern Federal University, Russky Island, Vladivostok 690022, Russia.
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Solov'eva T, Likhatskaya G, Khomenko V, Guzev K, Kim N, Bystritskaya E, Novikova O, Stenkova A, Rakin A, Isaeva M. The impact of length variations in the L2 loop on the structure and thermal stability of non-specific porins: The case of OmpCs from the Yersinia pseudotuberculosis complex. Biochim Biophys Acta Biomembr 2017; 1860:515-525. [PMID: 29038023 DOI: 10.1016/j.bbamem.2017.10.014] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 09/25/2017] [Accepted: 10/11/2017] [Indexed: 10/18/2022]
Abstract
Porins are integral proteins of the outer membranes of gram-negative bacteria. In membranes, they exist as homotrimers and the L2 loops contribute to their stability. Comparison of OmpC porins of the Yersinia pseudotuberculosis complex with other enterobacterial porins demonstrated L2 loop length diversity, which is caused by varying numbers of dipeptide/tripeptide repeats. The OmpC porins are highly homologous to each other, and they can be subdivided into five isoforms based on their L2 loop structure. Optical spectroscopy and SDS-PAGE experiments revealed that particularities of the L2 loops affected the structure and thermal stability of the porins. Thermal denaturation studies showed that porins with shorter loops, compared to porins with longer loops, had more stable tertiary and less stable secondary and quaternary structures. According to our comparative modeling results, the L2 loops differ in their structure by adopting different spatial positions and forming different polar bonds with a neighbor monomer. The replacement of asparagine with arginine at the C-terminus of the L2 loop shifts the loop upwards and causes the loss of contacts with the arginine clusters within the pores. The increase in the length of these loops ensures that they shift down toward the pore and restore their contacts with arginines on the channel wall, as is the case in classical nonspecific porins. Despite the fact that the surface charge density varies considerably among the OmpC porins, the L2 loops form a typical negatively charged region in the center of the trimer.
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Affiliation(s)
- T Solov'eva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - G Likhatskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - V Khomenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - K Guzev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - N Kim
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - E Bystritskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - O Novikova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - A Stenkova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia
| | - A Rakin
- Institute for Bacterial Infections and Zoonoses, Federal Research Institute for Animal Health, Naumburger Str. 96 a, 07743 Jena, Germany
| | - M Isaeva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry FEB RAS, 690022 Prospect 100-let Vladivostoku 159, Vladivostok, Russia.
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Golotin V, Balabanova L, Likhatskaya G, Rasskazov V. Recombinant production and characterization of a highly active alkaline phosphatase from marine bacterium Cobetia marina. Mar Biotechnol (NY) 2015; 17:130-143. [PMID: 25260971 DOI: 10.1007/s10126-014-9601-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
The psychrophilic marine bacterium, Cobetia marina, recovered from the mantle tissue of the marine mussel, Crenomytilus grayanus, which contained a gene encoding alkaline phosphatase (AP) with apparent biotechnology advantages. The enzyme was found to be more efficient than its counterparts and showed k cat value 10- to 100-fold higher than those of all known commercial APs. The enzyme did not require the presence of exogenous divalent cations and dimeric state of its molecule for activity. The recombinant enzyme (CmAP) production and purification were optimized with a final recovery of 2 mg of the homogenous protein from 1 L of the transgenic Escherichia coli Rosetta(DE3)/Pho40 cells culture. CmAP displayed a half-life of 16 min at 45 °C and 27 min at 40 °C in the presence of 2 mM EDTA, thus suggesting its relative thermostability in comparison with the known cold-adapted analogues. A high concentration of EDTA in the incubation mixture did not appreciably inhibit CmAP. The enzyme was stable in a wide range of pH (6.0-11.0). CmAP exhibited its highest activity at the reaction temperature of 40-50 °C and pH 9.5-10.3. The structural features of CmAP could be the reason for the increase in its stability and catalytic turnover. We have modeled the CmAP 3D structure on the base of the high-quality experimental structure of the close homologue Vibrio sp. AP (VAP) and mutated essential residues predicted to break Mg(2+) bonds in CmAP. It seems probable that the intrinsically tight binding of catalytic and structural metal ions together with the flexibility of intermolecular and intramolecular links in CmAP could be attributed to the adapted mutualistic lifestyle in oceanic waters.
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Affiliation(s)
- Vasily Golotin
- G.B. Elyakova Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of Russian Academy of Sciences, Prospect 100-letya Vladivostoka, 159, Vladivostok, Russian Federation
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Balabanova L, Golotin V, Kovalchuk S, Bulgakov A, Likhatskaya G, Son O, Rasskazov V. A novel bifunctional hybrid with marine bacterium alkaline phosphatase and Far Eastern holothurian mannan-binding lectin activities. PLoS One 2014; 9:e112729. [PMID: 25397876 PMCID: PMC4232515 DOI: 10.1371/journal.pone.0112729] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 10/14/2014] [Indexed: 11/19/2022] Open
Abstract
A fusion between the genes encoding the marine bacterium Cobetia marina alkaline phosphatase (CmAP) and Far Eastern holothurian Apostichopus japonicus mannan-binding C-type lectin (MBL-AJ) was performed. Expression of the fusion gene in E. coli cells resulted in yield of soluble recombinant chimeric protein CmAP/MBL-AJ with the high alkaline phosphatase activity and specificity of the lectin MBL-AJ. The bifunctional hybrid CmAP/MBL-AJ was produced as a dimer with the molecular mass of 200 kDa. The CmAP/MBL-AJ dimer model showed the two-subunit lectin part that is associated with two molecules of alkaline phosphatase functioning independently from each other. The highly active CmAP label genetically linked to MBL-AJ has advantaged the lectin-binding assay in its sensitivity and time. The double substitution A156N/F159K in the lectin domain of CmAP/MBL-AJ has enhanced its lectin activity by 25 ± 5%. The bifunctional hybrid holothurian's lectin could be promising tool for developing non-invasive methods for biological markers assessment, particularly for improving the MBL-AJ-based method for early detection of a malignant condition in cervical specimens.
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Affiliation(s)
- Larissa Balabanova
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Vasily Golotin
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Svetlana Kovalchuk
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Alexander Bulgakov
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Galina Likhatskaya
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Oksana Son
- School of Economics and Management, Far Eastern Federal University, Vladivostok, Russian Federation
| | - Valery Rasskazov
- Laboratory of Marine Biochemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
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Likhatskaya G, Trifonov E, Kovalchuk S, Balabanova L, Bakunina I, Petruk S, Zviagintseva T, Nurminsky E, Rasskazov V. Modeling the 3D-structure of marine enzymes and its complexes with substrates and inhibitors. J Biotechnol 2008. [DOI: 10.1016/j.jbiotec.2008.07.1277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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