1
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Rubtsova MY, Filippova AA, Fursova NK, Grigorenko VG, Presnova GV, Ulyashova MM, Egorov AM. Quantitative Determination of Beta-Lactamase mRNA in the RNA Transcripts of Antibiotic-Resistant Bacteria Using Colorimetric Biochips. J Anal Chem 2022. [DOI: 10.1134/s1061934822050124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Sidorova MV, Bibilashvili RS, Avdeev DV, Kozhokar US, Palkeeva ME, Ovchinnikov MV, Molokoedov AS, Shirokov DA, Semyonova AV, Uvarova VI, Kulyaev PO, Khvatov EV, Ignatova AA, Feofanov AV, Osolodkin DI, Porozov YB, Kozlovskaya LI, Ishmukhametov AA, Parfyonova YV, Egorov AM. Properties and Activity of Peptide Derivatives of ACE2 Cellular Receptor and Their Interaction with SARS-CoV-2 S Protein Receptor-Binding Domain. DOKL BIOCHEM BIOPHYS 2022; 507:237-241. [PMID: 36580213 PMCID: PMC9798946 DOI: 10.1134/s1607672922060126] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 12/30/2022]
Abstract
The aim of this work was to design and characterize peptides based on the α-helices h1 and h2 of the ACE2 receptor, forming the interaction interface between the receptor-binding domain (RBD) of the SARS-CoV-2 S protein and the cellular ACE2 receptor. Monomeric and heterodimeric peptides connected by disulfide bonds at different positions were synthesized. Solubility, RBD-binding affinity, and peptide helicity were experimentally measured, and molecular dynamics simulation was performed in various solvents. It was established that the preservation of the helical conformation is a necessary condition for the binding of peptides to RBD. The peptides have a low degree of helicity and low affinity for RBD in water. Dimeric peptides have a higher degree of helicity than monomeric ones, probably due to the mutual influence of helices. The degree of helicity of the peptides in trifluoroethanol is the highest; however, for in vitro studies, the most suitable solvent is a water-ethanol mixture.
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Affiliation(s)
- M. V. Sidorova
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - R. S. Bibilashvili
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - D. V. Avdeev
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - U. S. Kozhokar
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - M. E. Palkeeva
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - M. V. Ovchinnikov
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A. S. Molokoedov
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - D. A. Shirokov
- Federal Research and Clinical Center of Physical Chemical Medicine, Federal Medical Biological Agency, Moscow, Russia ,Skryabin Moscow State Academy of Veterinary Medicine and Biotechnology, Moscow, Russia
| | - A. V. Semyonova
- Federal Research and Clinical Center of Physical Chemical Medicine, Federal Medical Biological Agency, Moscow, Russia
| | - V. I. Uvarova
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia
| | - P. O. Kulyaev
- Sirius University of Science and Technology, Sochi, Russia
| | - E. V. Khvatov
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia
| | - A. A. Ignatova
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | | | - D. I. Osolodkin
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia ,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Yu. B. Porozov
- Sirius University of Science and Technology, Sochi, Russia ,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - L. I. Kozlovskaya
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia ,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - A. A. Ishmukhametov
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia ,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Ye. V. Parfyonova
- Chazov National Medical Research Center for Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A. M. Egorov
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences (Institute of Poliomyelitis), Moscow, Russia ,Lomonosov Moscow State University, Moscow, Russia
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3
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Bibilashvili RS, Sidorova MV, Dudkina US, Palkeeva ME, Molokoedov AS, Kozlovskaya LI, Egorov AM, Ishmukhametov AA, Parfyonova EV. Peptide Inhibitors of the Interaction of the SARS-CoV-2 Receptor-Binding Domain with the ACE2 Cell Receptor. Biochem Mosc Suppl B Biomed Chem 2021; 15:274-280. [PMID: 34745440 PMCID: PMC8562373 DOI: 10.1134/s199075082104003x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 11/23/2022]
Abstract
Computer simulation has been used to identify peptides that mimic the natural target of the SARS-CoV-2 coronavirus spike (S) protein, the angiotensin-converting enzyme type 2 (ACE2) cell receptor. Based on the structure of the complex of the protein S receptor-binding domain (RBD) and ACE2, the design of chimeric molecules consisting of two 22-23-mer peptides linked to each other by disulfide bonds was carried out. The chimeric molecule X1 was a disulfide dimer, in which terminal cysteine residues in the precursor molecules h1 and h2 were connected by the S-S bond. In the chimeric molecule X2, the disulfide bond was located in the middle of each precursor peptide molecule. The precursors h1 and h2 mimic amino acid sequences of α1- and α2-helices of the ACE2 extracellular peptidase domain, respectively, keeping intact most of the amino acid residues involved in the interaction with RBD. The aim of the work was to evaluate the binding efficiency of chimeric molecules and their constituent peptides with RBD (particularly in dependence of the middle and terminal methods of fixing the initial peptides h1 and h2). The proposed polypeptides and chimeric molecules were synthesized by chemical methods, purified to 95-97% purity, and characterized by HPLC and MALDI-TOF mass spectrometry. Binding of these peptides to the SARS-CoV-2 RBD was evaluated by microthermophoresis with recombinant domains corresponding in sequence to the original Chinese (GenBank ID NC_045512.2) and the British (B. 1.1.7, GISAID EPI_ISL_683466) variants. The original RBD of the Chinese variant bound to three synthesized peptides: linear h2 and both chimeric variants. Chimeric peptides were also bound to the RBD of the British variant. The antiviral activity of the proposed peptides was evaluated in Vero cell line.
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Affiliation(s)
- R Sh Bibilashvili
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
| | - M V Sidorova
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
| | - U S Dudkina
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
| | - M E Palkeeva
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
| | - A S Molokoedov
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
| | - L I Kozlovskaya
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological products of the Russian Academy of Sciences, 108819 Moscow, Russia.,Sechenov Moscow State Medical University, 119991 Moscow, Russia
| | - A M Egorov
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological products of the Russian Academy of Sciences, 108819 Moscow, Russia.,Moscow State University, 119991 Moscow, Russia
| | - A A Ishmukhametov
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological products of the Russian Academy of Sciences, 108819 Moscow, Russia.,Sechenov Moscow State Medical University, 119991 Moscow, Russia
| | - E V Parfyonova
- National Medical Research Center for Cardiology, 3rd Cherepkovskaya 15А, 121552 Moscow, Russia
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4
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Abstract
This issue of the Biochemistry (Moscow) journal presents reviews and experimental articles on the new strategies for solving the problem of antibiotic resistance and on the search for novel antimicrobial preparations using the methods of molecular biology, genetics, and nanotechnology. A wide variety of scientific approaches and successful (as a rule) research results give hope for overcoming microbial antibiotic resistance in the fight against infectious diseases.
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Affiliation(s)
- A G Gabibov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.,Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - O A Dontsova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.,Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.,Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, 143028, Russia
| | - A M Egorov
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
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5
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Abstract
β-Lactam antibiotics account for about 60% of all produced antibiotics. Due to a high activity and minimal side effects, they are the most commonly used class of antibacterial drugs for the treatment of various infectious diseases of humans and animals, including severe hospital infections. However, the emergence of bacteria resistant to β-lactams has led to the clinical inefficiency of these antibiotics, and as a result, their use in medicine has been limited. The search for new effective ways for overcoming the resistance to β-lactam antibiotics is an essential task. The major mechanism of bacterial resistance is the synthesis of β-lactamases (BLs) that break the antibiotic β-lactam ring. Here, we review specific inhibitors of serine β-lactamases and metallo-β-lactamases and discuss approaches for creating new inhibitors that would prolong the "life" of β-lactams.
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Affiliation(s)
- A M Egorov
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - M M Ulyashova
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - M Yu Rubtsova
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
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6
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Bibilashvili RS, Sidorova MV, Dudkina US, Palkeeva ME, Molokoedov AS, Kozlovskaya LI, Egorov AM, Ishmukhametov AA, Parfyonova YV. [Peptide inhibitors of the interaction of the SARS-CoV-2 receptor-binding domain with the ACE2 cell receptor]. Biomed Khim 2021; 67:244-250. [PMID: 34142531 DOI: 10.18097/pbmc20216703244] [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] [Indexed: 11/23/2022]
Abstract
Computer simulation has been used to identify peptides that mimic the natural target of the SARS-CoV-2 coronavirus spike (S) protein, the angiotensin converting enzyme type 2 (ACE2) cell receptor. Based on the structure of the complex of the protein S receptor-binding domain (RBD) and ACE2, the design of chimeric molecules consisting of two 22-23-mer peptides linked to each other by disulfide bonds was carried out. The chimeric molecule X1 was a disulfide dimer, in which edge cysteine residues in the precursor molecules h1 and h2 were connected by the S-S bond. In the chimeric molecule X2, the disulfide bond was located in the middle of the molecule of each of the precursor peptides. The precursors h1 and h2 modelled amino acid sequences of α1- and α2-helices of the extracellular peptidase domain of ACE2, respectively, keeping intact most of the amino acid residues involved in the interaction with RBD. The aim of the work was to evaluate the binding efficiency of chimeric molecules and their RBD-peptides (particularly in dependence of the middle and edge methods of fixing the initial peptides h1 and h2). The proposed polypeptides and chimeric molecules were synthesized by chemical methods, purified (to 95-97% purity), and characterized by HPLC and MALDI-TOF mass spectrometry. The binding of the peptides to the SARS-CoV-2 RBD was evaluated by microthermophoresis with recombinant domains corresponding in sequence to the original Chinese (GenBank ID NC_045512.2) and the British (B. 1.1.7, GISAID EPI_ISL_683466) variants. Binding to the original RBD of the Chinese variant was detected in three synthesized peptides: linear h2 and both chimeric variants. Chimeric peptides were also bound to the RBD of the British variant with micromolar constants. The antiviral activity of the proposed peptides in Vero cell culture was also evaluated.
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Affiliation(s)
| | - M V Sidorova
- National Medical Research Center for Cardiology, Moscow, Russia
| | - U S Dudkina
- National Medical Research Center for Cardiology, Moscow, Russia
| | - M E Palkeeva
- National Medical Research Center for Cardiology, Moscow, Russia
| | - A S Molokoedov
- National Medical Research Center for Cardiology, Moscow, Russia
| | - L I Kozlovskaya
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences, Moscow, Russia; Sechenov Moscow State Medical University, Moscow, Russia
| | - A M Egorov
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences, Moscow, Russia; Lomonosov Moscow State University, Moscow, Russia
| | - A A Ishmukhametov
- Chumakov Federal Scientific Center for Research and Development of Immune and Biological Products of the Russian Academy of Sciences, Moscow, Russia; Sechenov Moscow State Medical University, Moscow, Russia
| | - Ye V Parfyonova
- National Medical Research Center for Cardiology, Moscow, Russia
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Rubtsova MY, Ulyashova MM, Pobolelova YI, Presnova GV, Egorov AM. Biochip for the Simultaneous Identification of Beta-Lactamase and Carbapenemase Genes Conferring Bacterial Resistance to Beta-Lactam Antibiotics. APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s000368382002012x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Sukhoverkov KV, Le-Deygen IM, Egorov AM, Kudryashova EV. Physicochemical Properties of the Inclusion Complex of Moxifloxacin with Hydroxypropyl-β-Cyclodextrin Synthesized by RESS. Russ J Phys Chem B 2019. [DOI: 10.1134/s1990793118070126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Abstract
The resistance of microorganisms to antibiotics has been developing for more than 2 billion years and is widely distributed among various representatives of the microbiological world. Bacterial enzymes play a key role in the emergence of resistance. Classification of these enzymes is based on their participation in various biochemical mechanisms: modification of the enzymes that act as antibiotic targets, enzymatic modification of intracellular targets, enzymatic transformation of antibiotics, and the implementation of cellular metabolism reactions. The main mechanisms of resistance development are associated with the evolution of superfamilies of bacterial enzymes due to the variability of the genes encoding them. The collection of all antibiotic resistance genes is known as the resistome. Tens of thousands of enzymes and their mutants that implement various mechanisms of resistance form a new community that is called the enzystome. Analysis of the structure and functional characteristics of enzymes, which are the targets for different classes of antibiotics, will allow us to develop new strategies for overcoming the resistance.
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Egorov AM, Ulyashova MM, Rubtsova MY. Bacterial Enzymes and Antibiotic Resistance. Acta Naturae 2018; 10:33-48. [PMID: 30713760 PMCID: PMC6351036] [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: 08/29/2018] [Indexed: 11/01/2022] Open
Abstract
The resistance of microorganisms to antibiotics has been developing for more than 2 billion years and is widely distributed among various representatives of the microbiological world. Bacterial enzymes play a key role in the emergence of resistance. Classification of these enzymes is based on their participation in various biochemical mechanisms: modification of the enzymes that act as antibiotic targets, enzymatic modification of intracellular targets, enzymatic transformation of antibiotics, and the implementation of cellular metabolism reactions. The main mechanisms of resistance development are associated with the evolution of superfamilies of bacterial enzymes due to the variability of the genes encoding them. The collection of all antibiotic resistance genes is known as the resistome. Tens of thousands of enzymes and their mutants that implement various mechanisms of resistance form a new community that is called "the enzystome." Analysis of the structure and functional characteristics of enzymes, which are the targets for different classes of antibiotics, will allow us to develop new strategies for overcoming the resistance.
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Affiliation(s)
- A. M. Egorov
- Chemistry Faculty, M.V. Lomonosov Moscow State University, Leninskie gori, 1, bldg. 3, Moscow, 119991, Russia
| | - M. M. Ulyashova
- Chemistry Faculty, M.V. Lomonosov Moscow State University, Leninskie gori, 1, bldg. 3, Moscow, 119991, Russia
| | - M. Yu. Rubtsova
- Chemistry Faculty, M.V. Lomonosov Moscow State University, Leninskie gori, 1, bldg. 3, Moscow, 119991, Russia
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Bagratashvili VN, Bogorodskiy SE, Egorov AM, Krotova LI, Mironov AV, Parenago OO, Pokrovskiy OI, Ustinovich KB, Chizhov PS, Prokopchuk DI, Popov VK, Tsypina SI. Polymorphism of Risperidone in Supercritical Fluid Processes of Micronization and Encapsulation into Aliphatic Polyesters. Russ J Phys Chem B 2018. [DOI: 10.1134/s199079311707003x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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12
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Kudryashova EV, Sukhoverkov KV, Deygen IM, Vorobei AM, Pokrovskiy OI, Parenago OO, Presnov DE, Egorov AM. Moxifloxacin Micronization via Supercritical Antisolvent Precipitation. Russ J Phys Chem B 2018. [DOI: 10.1134/s1990793117070120] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Grigorenko VG, Rubtsova MY, Uporov IV, Ishtubaev IV, Andreeva IP, Shcherbinin DS, Veselovsky AV, Egorov AM. [Bacterial TEM-type serine beta-lactamases: structure and analysis of mutations]. Biomed Khim 2017; 63:499-507. [PMID: 29251610 DOI: 10.18097/pbmc20176306499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Beta-lactamases (EC 3.5.2.6) represent a superfamily containing more than 2,000 members: it includes genetically and functionally different bacterial enzymes capable to destroy the beta-lactam antibiotics. The most common are beta-lactamases of molecular class A with serine in the active center. Among them, TEM-type beta-lactamases are of particular interest from the viewpoint of studying the mechanisms of the evolution of resistance due to their broad polymorphism. To date, more than 200 sequences of TEM-type beta-lactamases have been described and more than 60 structures of different mutant forms have been presented in Protein Data Bank. We have considered the main structural features of the enzymes of this type with particular attention to the analysis of key drug resistance and the secondary mutations, their location relative to the active center and the surface of the protein globule. We have developed the BlaSIDB database (www.blasidb.org) which is an open information resource combining available data on 3D structures, amino acid sequences and nomenclature of the corresponding forms of beta-lactamases.
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Affiliation(s)
- V G Grigorenko
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
| | - M Yu Rubtsova
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
| | - I V Uporov
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
| | - I V Ishtubaev
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
| | - I P Andreeva
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
| | - D S Shcherbinin
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia; Center for Data-Intensive Biomedicine and Biotechnology, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - A V Veselovsky
- Institute of Physiologically Active Compounds, Moscow region, Chernogolovka, Russia
| | - A M Egorov
- Chemical Department of M.V.Lomonosov Moscow State University, Moscow, Russia
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Shcherbinin DS, Rubtsova MY, Grigorenko VG, Uporov IV, Veselovsky AV, Egorov AM. The study of the role of mutations M182T and Q39K in the TEM-72 β-lactamase structure by the molecular dynamics method. Biochem Moscow Suppl Ser B 2017. [DOI: 10.1134/s1990750817020056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Kudryashova EV, Deygen IM, Sukhoverkov KV, Filatova LY, Klyachko NL, Vorobei AM, Pokrovskiy OI, Ustinovich KB, Parenago OO, Antonov EN, Dunaev AG, Krotova LI, Popov VK, Egorov AM. Micronization of levofloxacin by supercritical antisolvent precipitation. Russ J Phys Chem B 2017. [DOI: 10.1134/s1990793116080054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Shcherbinin DS, Rubtsova MY, Grigorenko VG, Uporov IV, Veselovsky AV, Egorov AM. [Investigation the role of mutations M182T and Q39K in structure of beta-lactamase TEM-72 by molecular dynamics method]. Biomed Khim 2017; 62:527-534. [PMID: 27797327 DOI: 10.18097/pbmc20166205527] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Synthesis of b-lactamases is one of the common mechanisms of bacterial resistance to b-lactam antibiotics including penicillins and cephalosporins. The widespread use of antibiotics results in appearance of numerous extended-spectrum b-lactamase variants or resistance to inhibitors. Mutations of 92 residues of TEM type were found. Several mutations are the key mutations that determine the extension of spectrum of substrates. However, roles of the most associated mutations, located far from active site, remain unknown. We have investigated the role of associated mutations in structure of b-lactamase TEM-72, which contain two key mutation (G238S, E240K) and two associated mutations (Q39K, M182T) by means of simulation of molecular dynamics. The key mutation lead to destabilization of the protein globule, characterized by increased mobility of amino acid residues at high temperature of modelling. Mutation M182T lead to stabilization protein, whereas mutation Q39K is destabilizing mutation. It seems that the last mutation serves for optimization of conformational mobility of b-lactamase and may influence on enzyme activity.
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Affiliation(s)
| | - M Yu Rubtsova
- Lomonosov Moscow State University, Chemical Department, Moscow, Russia
| | - V G Grigorenko
- Lomonosov Moscow State University, Chemical Department, Moscow, Russia
| | - I V Uporov
- Lomonosov Moscow State University, Chemical Department, Moscow, Russia
| | | | - A M Egorov
- Lomonosov Moscow State University, Chemical Department, Moscow, Russia
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17
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Bagratashvili VN, Bogorodskii SE, Egorov AM, Krotova LI, Popov VK, Sevast’yanov VI. Supercritical fluid fabrication of components for a sustained-release injectable risperidone dose form. Russ J Phys Chem B 2017. [DOI: 10.1134/s1990793116070022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Egorov AM, Putsylov IA, Smirnov SE, Fateev SA. Effect of mechanical activation on characteristics of electrodes based on fluorinated carbon nanotubes. RUSS J APPL CHEM+ 2016. [DOI: 10.1134/s1070427216030162] [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: 11/23/2022]
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19
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Deygen IM, Egorov AM, Kudryashova EV. Structure and stability of fluoroquinolone-(2-hydroxypropyl)-β-cyclodextrin complexes as perspective antituberculosis drugs. ACTA ACUST UNITED AC 2016. [DOI: 10.3103/s0027131416010028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Grigorenko VG, Andreeva IP, Rubtsova MY, Burmakin VV, Uporov IV, Egorov AM. Study of catalytic properties of recombinant β-lactamases TEM-1 and TEM-171 of the molecular class A. ACTA ACUST UNITED AC 2016. [DOI: 10.3103/s0027131415060036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Dubrovin EV, Presnova GV, Rubtsova MY, Egorov AM, Grigorenko VG, Yaminsky IV. The Use of Atomic Force Microscopy for 3D Analysis of Nucleic Acid Hybridization on Microarrays. Acta Naturae 2015. [DOI: 10.32607/20758251-2015-7-2-108-114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Oligonucleotide microarrays are considered today to be one of the most efficient methods of gene diagnostics. The capability of atomic force microscopy (AFM) to characterize the three-dimensional morphology of single molecules on a surface allows one to use it as an effective tool for the 3D analysis of a microarray for the detection of nucleic acids. The high resolution of AFM offers ways to decrease the detection threshold of target DNA and increase the signal-to-noise ratio. In this work, we suggest an approach to the evaluation of the results of hybridization of gold nanoparticle-labeled nucleic acids on silicon microarrays based on an AFM analysis of the surface both in air and in liquid which takes into account of their three-dimensional structure. We suggest a quantitative measure of the hybridization results which is based on the fraction of the surface area occupied by the nanoparticles.
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Grigorenko VG, Andreeva IP, Rubtsova MY, Egorov AM. Recombinant horseradish peroxidase: Production and analytical applications. Biochemistry Moscow 2015; 80:408-16. [DOI: 10.1134/s0006297915040033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Presnova GV, Rubtsova MY, Presnov DE, Grigorenko VG, Yaminsky IV, Egorov AM. [Conjugates of streptavidin with gold nanoparticles for the visualization of dna single interactions on the silicon surface]. Biomed Khim 2015; 60:538-42. [PMID: 25386881 DOI: 10.18097/pbmc20146005538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The potential of the method of scanning electron microscopy (SEM) to visualize the results of individual acts of DNA and oligonucleotides hybridization using gold nanoparticles as label was investigated. Molecule of biotin was introduced into DNA or oligonucleotide, and then it was detected in DNA duplex using a conjugate of streptavidin with gold nanoparticles. Effective imaging of DNA duplexes was possible using a conjugate prepared by covalent binding.. The detection limit of the model oligonucleotide of 19 bases was 20 pg.
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Dubrovin EV, Presnova GV, Rubtsova MY, Grigorenko VG, Ivanin AI, Egorov AM, Yaminsky IV. [Implementation of scanning probe microscopy for the solution of molecular diagnostics tasks]. Biomed Khim 2015; 60:543-7. [PMID: 25386882 DOI: 10.18097/pbmc20146005543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We present new approaches to improve the efficiency of DNA by scanning probe microscopy using a highly specific hybridization on affine surfaces and nanostructures of gold as a labels. Scanning probe microscopy allows to register of individual acts of hybridization by the detection of gold labels on the surface affinity followed by automatic calculation of the total.
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Dubrovin EV, Presnova GV, Rubtsova MY, Egorov AM, Grigorenko VG, Yaminsky IV. The Use of Atomic Force Microscopy for 3D Analysis of Nucleic Acid Hybridization on Microarrays. Acta Naturae 2015; 7:108-14. [PMID: 26085952 PMCID: PMC4463420] [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] [Indexed: 11/04/2022] Open
Abstract
Oligonucleotide microarrays are considered today to be one of the most efficient methods of gene diagnostics. The capability of atomic force microscopy (AFM) to characterize the three-dimensional morphology of single molecules on a surface allows one to use it as an effective tool for the 3D analysis of a microarray for the detection of nucleic acids. The high resolution of AFM offers ways to decrease the detection threshold of target DNA and increase the signal-to-noise ratio. In this work, we suggest an approach to the evaluation of the results of hybridization of gold nanoparticle-labeled nucleic acids on silicon microarrays based on an AFM analysis of the surface both in air and in liquid which takes into account of their three-dimensional structure. We suggest a quantitative measure of the hybridization results which is based on the fraction of the surface area occupied by the nanoparticles.
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Affiliation(s)
- E. V. Dubrovin
- Department of Physics, Lomonosov Moscow State University, Leninskie gory, 1/2, 119991, Moscow, Russia
| | - G. V. Presnova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, 119991, Moscow, Russia
| | - M. Yu. Rubtsova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, 119991, Moscow, Russia
| | - A. M. Egorov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, 119991, Moscow, Russia,Russian Medical Academy of Postgraduate Education, Barrikadnaya, 2/1, 125993, Moscow, Russia
| | - V. G. Grigorenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, 119991, Moscow, Russia
| | - I. V. Yaminsky
- Department of Physics, Lomonosov Moscow State University, Leninskie gory, 1/2, 119991, Moscow, Russia,Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, 119991, Moscow, Russia
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Egorov AM, Matyukhova SA. Kinetics and mechanism of the reaction of benzyl bromide with copper in dimethylacetamide in the presence of oxygen. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363214090047] [Citation(s) in RCA: 1] [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: 11/23/2022]
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Presnova GV, Rubtsova MY, Presnov DE, Grigorenko VG, Yaminsky IV, Egorov AM. Streptavidin conjugates with gold nanoparticles for visualization of single DNA interactions on the silicon surface. Biochem Moscow Suppl Ser B 2014. [DOI: 10.1134/s1990750814020103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pobolelova YI, Ulyashova MM, Rubtsova MY, Egorov AM. Multiplex PCR for joint amplification of carbapenemase genes of molecular classes A, B, and D. Biochemistry (Mosc) 2014; 79:566-70. [PMID: 25100015 DOI: 10.1134/s0006297914060108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Here we present a method for joint amplification of genes of carbapenemases of molecular classes A, B, and D for hybridization analysis on DNA microarrays. Using new-generation DNA polymerase KAPA2G Fast (KAPA Biosystems, USA) together with optimization of the conditions for the multiplex PCR with 20 primer pairs allowed us to carry out joint amplification of full-length genes of seven different types of carbapenemases (KPC, VIM, IMP, SPM, SIM, GIM, and OXA) with simultaneous inclusion of biotin as a label. Yield of the labeled PCR product sufficient for further analysis by microarray hybridization was achieved 40 min after the start of the reaction. This reduced the total duration of DNA identification techniques, including sample preparation stage, to 4 h. The method for gene identification by DNA microarrays with the improved stage of amplification of specific carbapenemase genes was tested with clinical strains of gram-negative bacteria Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterobacteriaceae spp. with different sensitivity towards carbapenems according to phenotyping tests. All clinical strains of A. baumannii resistant to carbapenems were found to have genes of OXA-type carbapenemases (subtypes OXA-51, OXA-23, OXA-40, and OXA-58), and clinical strains of P. aeruginosa resistant to carbapenems were found to possess the gene of VIM-type metallo-beta-lactamase (subtype VIM-2). When testing clinical strains sensitive to carbapenems, carbapenemase genes were not detected. Thus, the method of identifying carbapenemase genes on DNA microarrays is characterized by high accuracy and can be used in clinical microbiology laboratories for express diagnostics of resistance to carbapenems.
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Affiliation(s)
- Yu I Pobolelova
- Lomonosov Moscow State University, Chemical Faculty, Moscow, 119991, Russia.
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Bagratashvili VN, Egorov AM, Krotova LI, Mironov AV, Panchenko VY, Parenago OO, Popov VK, Revelsky IA, Timashev PS, Tsypina SI. Supercritical fluid micronization of risperidone pharmaceutical substance. Russ J Phys Chem B 2013. [DOI: 10.1134/s1990793112070019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ulyashova MM, Rubtsova MY, Egorov AM. Colorimetric detection of immobilized horseradish peroxidase based on the co-oxidation of benzidine derivatives and 4-chloro-1-naphthol. Russ Chem Bull 2011. [DOI: 10.1007/s11172-011-0101-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Rubtsova MY, Ulyashova MM, Bachmann TT, Schmid RD, Egorov AM. Multiparametric determination of genes and their point mutations for identification of beta-lactamases. Biochemistry (Mosc) 2011; 75:1628-49. [PMID: 21417998 DOI: 10.1134/s0006297910130080] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
More than half of all currently used antibiotics belong to the beta-lactam group, but their clinical effectiveness is severely limited by antibiotic resistance of microorganisms that are the causative agents of infectious diseases. Several mechanisms for the resistance of Enterobacteriaceae have been established, but the main one is the enzymatic hydrolysis of the antibiotic by specific enzymes called beta-lactamases. Beta-lactamases represent a large group of genetically and functionally different enzymes of which extended-spectrum beta-lactamases (ESBLs) pose the greatest threat. Due to the plasmid localization of the encoded genes, the distribution of these enzymes among the pathogens increases every year. Among ESBLs the most widespread and clinically relevant are class A ESBLs of TEM, SHV, and CTX-M types. TEM and SHV type ESBLs are derived from penicillinases TEM-1, TEM-2, and SHV-1 and are characterized by several single amino acid substitutions. The extended spectrum of substrate specificity for CTX-M beta-lactamases is also associated with the emergence of single mutations in the coding genes. The present review describes various molecular-biological methods used to identify determinants of antibiotic resistance. Particular attention is given to the method of hybridization analysis on microarrays, which allows simultaneous multiparametric determination of many genes and point mutations in them. A separate chapter deals with the use of hybridization analysis on microarrays for genotyping of the major clinically significant ESBLs. Specificity of mutation detection by means of hybridization analysis with different detection techniques is compared.
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Affiliation(s)
- M Yu Rubtsova
- Chemical Faculty, Lomonosov Moscow State University, Russia.
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Koliasnikov OV, Grigorenko VG, Egorov AM, Lange S, Schmid RD. Recombinant Production of Horseradish Peroxidase Conjugates with Fab Antibodies in Pichia pastoris for Analytical Applications. Acta Naturae 2011. [DOI: 10.32607/20758251-2011-3-3-85-92] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Andreeva IP, Vorob'eva NT, Vinnitskiĭ LI, Bogush SS, Gavrilova EM, Egorov AM. [Enzyme-linked immunosorbent assay for determination of cyclosporin A in whole blood]. Biomed Khim 2011; 57:554-561. [PMID: 22629606 DOI: 10.18097/pbmc20115705554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A test-system based on enzyme-linked immunosorbent assay (ELISA) for quantitative determination of cyclosporin A (CSA) in human whole blood has been developed. The detection limit of the method was 25 ng/ml, the linearity of the method in the concentration range 60-1400 ng/ml varied from 94 to 105%, the variation coefficient did not exceed 8%. The novel method exhibited good correlation with radio-immunoassay and polarization fluoroimmunoassay methods; the linear regression coefficients were 0.965 and 0.983, respectively. The developed test system is stable for at least 9 months when stored at 4 degrees C and can be used in clinical practice.
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Koliasnikov OV, Grigorenko VG, Egorov AM, Lange S, Schmid RD. Recombinant Production of Horseradish Peroxidase Conjugates with Fab Antibodies in Pichia pastoris for Analytical Applications. Acta Naturae 2011; 3:85-92. [PMID: 22649698 PMCID: PMC3347603] [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] [Indexed: 10/27/2022] Open
Abstract
Recombinant immunoconjugates of marker enzymes with antigens or antibodies present considerably more advantages than those obtained by conventional methods of chemical synthesis; i.e. they are homogeneous, have a strictly determined stoichiometry, and retain the functional activity of both a marker protein and an antigen/antibody. Based on the pPICZαB shuttle vector, we first managed to obtain a recombinant conjugate of key marker enzyme horseradish peroxidase (HRP) withFabfragments of antibodies against atrazine. The resulting genetic construction allows us to switch to any other antibody sequence, via the simple re-cloning of variable parts and an additional reporter enzyme. Conjugates were successfully produced in thePichia pastorismethylotrophic yeast expression system. The target activity of the conjugates (both enzymatic and antigen-binding) has been demonstrated by ELISA method.
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Affiliation(s)
- O V Koliasnikov
- Kolmogorov Advanced Education and Science Center, Lomonosov Moscow State University
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Fedorova MD, Andreeva IP, Vilegzhanina ES, Komarov AA, Rubtsova MY, Samsonova JV, Egorov AM. Enzyme-linked immunosorbent assay of chlorampenicol in foodstuff. APPL BIOCHEM MICRO+ 2010. [DOI: 10.1134/s0003683810080107] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ulyashova MM, Khalilova YI, Rubtsova MY, Edelstein MV, Alexandrova IA, Egorov AM. Oligonucleotide Microarray for the Identification of Carbapenemase Genes of Molecular Classes A, B, and D. Acta Naturae 2010. [DOI: 10.32607/20758251-2010-2-3-101-109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Egorov AM, Matyukhova SA, Kocherova IS, Novikova AA, Anisimov AV. Kinetics and mechanism of nickel reaction with benzyl bromide in dimethylformamide. RUSS J GEN CHEM+ 2009. [DOI: 10.1134/s1070363209030177] [Citation(s) in RCA: 4] [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: 11/23/2022]
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Ivanov DV, Egorov AM. [Spreading and mechanisms of antimicrobial resistance of microorganisms, producing beta-lactamases. Phenotyping of potential AmpC-beta-lactamases producers of Enterobacteriaceae and molecular mechanisms of resistance to beta-lactams of Enterobacter cloacae strains, isolated in cases of nosocomial infections]. Biomed Khim 2009; 55:50-60. [PMID: 19351033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Susceptibility of nosocomial potential AmpC-beta-lactamases producers strains (n=128), isolated from patients admitted to 30 medical centers of 15 various regions of Russia has been investigated. The susceptibility testing was performed by the broth microdilution method. The most active antibacterial agents acting to the investigated strains remained carbapenems (imipenem and meropenem). PCR-based detection of beta-lactamase genes (TEM, SHV, CTX) was investigated in 51 E. cloacae strains. Alone or in various combinations TEM type beta-lactamases have been found in 31 (60.8%) isolates, SHV in 22 (43.1%), and CTX--in 22 (43.1%). There were negative results of TEM, SHV, CTX beta-lactamases genotyping in 13 (25.5%) E. cloacae suspect strains.
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Rubtsova MY, Samsonova JV, Egorov AM, Schmid RD. Simultaneous determination of several pesticides with chemiluminescent immunoassay on a multi‐spot membrane strip. FOOD AGR IMMUNOL 2008. [DOI: 10.1080/09540109809354986] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Rubtsova MY, Wittmann C, Egorov AM, Schmid RD. Chemiluminescent immunoassay: Application of a portable scanning luminometer for the determination of 2,4‐dichlorophenoxyacetic acid in microtiter and membrane strip format. FOOD AGR IMMUNOL 2008. [DOI: 10.1080/09540109709354954] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Ulyashova MM, Rubtsova MY, Bachmann T, Egorov AM. Optimization of DNA hybridization analysis on microarrays with colorimetric detection. ACTA ACUST UNITED AC 2008. [DOI: 10.3103/s0027131408020065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ivanov DV, Egorov AM. [Spreading and mechanisms of antibiotic resistance of microorganisms, producing beta-lactamases. Molecular mechanisms of resistance to beta-lactams of Klebsiella spp. strains, isolated in cases of nosocomial infections]. Biomed Khim 2008; 54:104-113. [PMID: 18421915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Antibiotic sensivity of nosocomial Klebsiella spp. strains (n = 212), isolated from patients treated in 30 medical centers of 15 various regions of Russia was investigated. The Klebsiella genus was represented by the following species: Klebsiella pneumoniae ss. pneumoniae--182 (85.8%), Klebsiella pneumoniae ss. ozaenae--1 (0.5%), Klebsiella oxytoca--29 (13.7%) isolates. The most active antibacterial agents against the investigated strains were carbapenems (imipenem and meropenem). Among 3rd generation cephalosporine the lowest MICs were observed for ceftazidime/clavulanic acid (MIC50--0.25 microg/ml, MIC90--64 microg/ml) and cefoperazone/sulbactam (MIC50--16 microg/ml, MIC90--64 microg/ml). Beta-lactamase genes (TEM, SHV, CTX) were detected in 42 Klebsiella pneumoniae ss. pneumoniae strains by PCR. Alone or in various combinations TEM type beta-lactamases have been found in 16 (38.1%) isolates, SHV--in 29 (69%), and CTX--in 27 (64.3%). Combinations of 2 different determinants were detected in 23.8% of the isolates, 3--in 26.2%. There were not isolates producing MBL class B among resistant to carbapenems nosocomial Klebsiella spp. strains.
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Ivanov DV, Egorov AM. [Spreading and mechanisms of antimicrobial resistance of microorganisms, producing beta-lactamases. Phenotypical screening for MBL producers (carbapenemases B1) among strains of Pseudomonas genus, isolated in cases of nosocomial infections]. Biomed Khim 2007; 53:653-661. [PMID: 18323150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Intrahospital strains (215) of the bacterial genus Pseudomonas isolated from patients of 30 Medical centers of 15 Russian regions have been investigated for antibiotic resistance. The bacterial cultures resistant to imipenem and/or meropenem were considered as metallo-beta-lactamase (MBL) producers. Production of subclass B1 MBL (carbapenemases) was evaluated by means of the double-disk approximation test using MBL inhibitor, EDTA. There were 55 P. aeroginosa strains (25.6%) resistant to imipenem and meropenem simultaneously; 19 isolates (8.8%) of P. aeroginosa were characterized by synergism between carbapenem and EDTA. The subclass B1 MBL producers are widely distributed in the intrahospital strain obtained from Moscow, Yaroslavl, Ekaterinburg, Omsk, and Tomsk hospitals.
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Egorov AM. [The goals and objectives of the Association of Clinical Laboratory Diagnostic Means Manufacture]. Klin Lab Diagn 2006:43-4. [PMID: 17087250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
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Egorov AM, Shibanov AN. [Domestic manufacture of means for clinical laboratory diagnosis]. Klin Lab Diagn 2006:44-7. [PMID: 17087251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
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