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Yang M, Li C, Ye G, Shen C, Shi H, Zhong L, Tian Y, Zhao M, Wu P, Hussain A, Zhang T, Yang H, Yang J, Weng Y, Liu X, Wang Z, Gan L, Zhang Q, Liu Y, Yang G, Huang Y, Zhao Y. Aptamers targeting SARS-CoV-2 nucleocapsid protein exhibit potential anti pan-coronavirus activity. Signal Transduct Target Ther 2024; 9:40. [PMID: 38355661 PMCID: PMC10866937 DOI: 10.1038/s41392-024-01748-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/19/2023] [Accepted: 01/16/2024] [Indexed: 02/16/2024] Open
Abstract
Emerging and recurrent infectious diseases caused by human coronaviruses (HCoVs) continue to pose a significant threat to global public health security. In light of this ongoing threat, the development of a broad-spectrum drug to combat HCoVs is an urgently priority. Herein, we report a series of anti-pan-coronavirus ssDNA aptamers screened using Systematic Evolution of Ligands by Exponential Enrichment (SELEX). These aptamers have nanomolar affinity with the nucleocapsid protein (NP) of Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and also show excellent binding efficiency to the N proteins of both SARS, MERS, HCoV-OC43 and -NL63 with affinity KD values of 1.31 to 135.36 nM. Such aptamer-based therapeutics exhibited potent antiviral activity against both the authentic SARS-CoV-2 prototype strain and the Omicron variant (BA.5) with EC50 values at 2.00 nM and 41.08 nM, respectively. The protein docking analysis also evidenced that these aptamers exhibit strong affinities for N proteins of pan-coronavirus and other HCoVs (-229E and -HKU1). In conclusion, we have identified six aptamers with a high pan-coronavirus antiviral activity, which could potentially serve as an effective strategy for preventing infections by unknown coronaviruses and addressing the ongoing global health threat.
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Affiliation(s)
- Minghui Yang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Chunhui Li
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Guoguo Ye
- National Clinical Research Center for infectious disease, Shenzhen Third People's Hospital, Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, 518112, China
| | - Chenguang Shen
- Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, 510515, China
| | - Huiping Shi
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Liping Zhong
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, 530021, China
| | - Yuxin Tian
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Mengyuan Zhao
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Pengfei Wu
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Abid Hussain
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Tian Zhang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Haiyin Yang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Jun Yang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Yuhua Weng
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Xinyue Liu
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Zhimin Wang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China
| | - Lu Gan
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, 530021, China
| | - Qianyu Zhang
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, 530021, China
| | - Yingxia Liu
- National Clinical Research Center for infectious disease, Shenzhen Third People's Hospital, Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, 518112, China
| | - Ge Yang
- CAMS Key Laboratory of Antiviral Drug Research, Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
| | - Yuanyu Huang
- School of Life Science, Advanced Research Institute of Multidisciplinary Science, Key Laboratory of Molecular Medicine and Biotherapy, Beijing Institute of Technology, Beijing, 100081, China.
| | - Yongxiang Zhao
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, 530021, China.
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Bekkouche I, Shishonin AY, Vetcher AA. Recent Development in Biomedical Applications of Oligonucleotides with Triplex-Forming Ability. Polymers (Basel) 2023; 15:polym15040858. [PMID: 36850142 PMCID: PMC9964087 DOI: 10.3390/polym15040858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/12/2023] Open
Abstract
A DNA structure, known as triple-stranded DNA, is made up of three oligonucleotide chains that wind around one another to form a triple helix (TFO). Hoogsteen base pairing describes how triple-stranded DNA may be built at certain conditions by the attachment of the third strand to an RNA, PNA, or DNA, which might all be employed as oligonucleotide chains. In each of these situations, the oligonucleotides can be employed as an anchor, in conjunction with a specific bioactive chemical, or as a messenger that enables switching between transcription and replication through the triplex-forming zone. These data are also considered since various illnesses have been linked to the expansion of triplex-prone sequences. In light of metabolic acidosis and associated symptoms, some consideration is given to the impact of several low-molecular-weight compounds, including pH on triplex production in vivo. The review is focused on the development of biomedical oligonucleotides with triplexes.
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Affiliation(s)
- Incherah Bekkouche
- Nanotechnology Scientific and Educational Center, Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia (RUDN), Miklukho-Maklaya Str. 6, Moscow 117198, Russia
| | - Alexander Y. Shishonin
- Complementary and Integrative Health Clinic of Dr. Shishonin, 5, Yasnogorskaya Str., Moscow 117588, Russia
| | - Alexandre A. Vetcher
- Nanotechnology Scientific and Educational Center, Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia (RUDN), Miklukho-Maklaya Str. 6, Moscow 117198, Russia
- Complementary and Integrative Health Clinic of Dr. Shishonin, 5, Yasnogorskaya Str., Moscow 117588, Russia
- Correspondence:
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Kohlberger M, Gadermaier G. SELEX: Critical factors and optimization strategies for successful aptamer selection. Biotechnol Appl Biochem 2022; 69:1771-1792. [PMID: 34427974 PMCID: PMC9788027 DOI: 10.1002/bab.2244] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/22/2021] [Indexed: 12/30/2022]
Abstract
Within the last decade, the application range of aptamers in biochemistry and medicine has expanded rapidly. More than just a replacement for antibodies, these intrinsically structured RNA- or DNA-oligonucleotides show great potential for utilization in diagnostics, specific drug delivery, and treatment of certain medical conditions. However, what is analyzed less frequently is the process of aptamer identification known as systematic evolution of ligands by exponential enrichment (SELEX) and the functional mechanisms that lie at its core. SELEX involves numerous singular processes, each of which contributes to the success or failure of aptamer generation. In this review, critical steps during aptamer selection are discussed in-depth, and specific problems are presented along with potential solutions. The discussed aspects include the size and molecule type of the selected target, the nature and stringency of the selection process, the amplification step with its possible PCR bias, the efficient regeneration of RNA or single-stranded DNA, and the different sequencing procedures and screening assays currently available. Finally, useful quality control steps and their role within SELEX are presented. By understanding the mechanisms through which aptamer selection is influenced, the design of more efficient SELEX procedures leading to a higher success rate in aptamer identification is enabled.
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Affiliation(s)
- Michael Kohlberger
- Department of BiosciencesParis Lodron University SalzburgSalzburgAustria,Christian Doppler Laboratory for Biosimilar CharacterizationParis Lodron University SalzburgSalzburgAustria
| | - Gabriele Gadermaier
- Department of BiosciencesParis Lodron University SalzburgSalzburgAustria,Christian Doppler Laboratory for Biosimilar CharacterizationParis Lodron University SalzburgSalzburgAustria
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Sinitsyna VV, Vetcher AA. Nucleic Acid Aptamers in Nanotechnology. Biomedicines 2022; 10:1079. [PMID: 35625815 PMCID: PMC9139068 DOI: 10.3390/biomedicines10051079] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/04/2022] [Accepted: 05/04/2022] [Indexed: 12/10/2022] Open
Abstract
Nucleic Acid (NA) aptamers are oligonucleotides. They are unique due to their secondary and tertiary structure; namely, the secondary structure defines the tertiary one by means of affinity and specificity. Our review is devoted only to DNA and RNA aptamers, since the majority of achievements in this direction were obtained with their application. NA aptamers can be used as macromolecular devices and consist of short single-stranded molecules, which adopt unique three-dimensional structures due to the interaction of complementary parts of the chain and stacking interactions. The review is devoted to the recent nanotechnological advances in NA aptamers application.
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Affiliation(s)
- Valentina V. Sinitsyna
- Nanotechnology Scientific and Educational Center, Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia (RUDN), Miklukho-Maklaya St. 6, Moscow 117198, Russia
- Shirshov Institute of Oceanology, Russian Academy of Sciences 36, Nahimovskiy Prospect, Moscow 117997, Russia
| | - Alexandre A. Vetcher
- Nanotechnology Scientific and Educational Center, Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia (RUDN), Miklukho-Maklaya St. 6, Moscow 117198, Russia
- Complementary and Integrative Health Clinic of Dr. Shishonin 5, Yasnogorskaya St., Moscow 117588, Russia
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Alieva R, Novikov R, Tashlitsky V, Arutyunyan A, Kopylov A, Zavyalova E. Bimodular thrombin aptamers with two types of non-covalent locks. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2021; 40:559-577. [PMID: 33847237 DOI: 10.1080/15257770.2021.1910297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Aptamers are structured oligonucleotides that specifically bind their targets. Oligonucleotides can be assembled in large nanostructures via intermolecular duplexes or G-quadruplexes. Addition of aptamers can be used to create nanostructures that bind specifically certain targets. Here two types of self-assembling locks were used to create bimodular aptamer constructions. Well-known aptamer to thrombin was chosen as a model object. The assembly of duplex locks was more efficient at low concentrations. The functional activity of aptamer modules was nearly the same as in HD1. However, the affinity of bimodular aptamers with G-quadruplex locks to immobilized thrombin was 5-10 times higher.
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Affiliation(s)
- Rugiya Alieva
- Chemistry Department, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Roman Novikov
- Engelhardt Institute of Molecular Biology RAS, Moscow, Russian Federation
| | - Vadim Tashlitsky
- Chemistry Department, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Alexander Arutyunyan
- Belozersky Research Institute of Physical Chemical Biology, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Alexey Kopylov
- Chemistry Department, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Elena Zavyalova
- Chemistry Department, Lomonosov Moscow State University, Moscow, Russian Federation
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Covalent Bi-Modular Parallel and Antiparallel G-Quadruplex DNA Nanocostructs Reduce Viability of Patient Glioma Primary Cell Cultures. Int J Mol Sci 2021; 22:ijms22073372. [PMID: 33806042 PMCID: PMC8036578 DOI: 10.3390/ijms22073372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 12/22/2022] Open
Abstract
G-quadruplex oligonucleotides (GQs) exhibit specific anti-proliferative activity in human cancer cell lines, and they can selectively inhibit the viability/proliferation of cancer cell lines vs. non-cancer ones. This ability could be translated into a cancer treatment, in particular for glioblastoma multiform (GBM), which currently has a poor prognosis and low-efficiency therapeutic treatments. A novel bi-modular GQ, bi-(AID-1-T), a twin of the previously described three-quartet AID-1-T, was designed and studied in terms of both its structure and function. A covalent conjugation of two AID-1-Ts via three thymidine link, TTT, did not interfere with its initial GQ structure. A comparison of bi-(AID-1-T) with its mono-modular AID-1-T, mono-modular two-quartet HD1, and bi-modular bi-HD1, as well as conventional two-quartet AS1411, was made. Among the five GQs studied, bi-(AID-1-T) had the highest anti-proliferative activity for the neural cancer cell line U87, while not affecting the control cell line, human embryonic fibroblasts. GQs, for the first time, were tested on several primary glioma cultures from patient surgical samples. It turned out that the sensitivity of the patient primary glioma cultures toward GQs varied, with an apparent IC50 of less than 1 μM for bi-(AID-1-T) toward the most sensitive G11 cell culture (glioma, Grade III).
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Bizyaeva AA, Bunin DA, Moiseenko VL, Gambaryan AS, Balk S, Tashlitsky VN, Arutyunyan AM, Kopylov AM, Zavyalova EG. The Functional Role of Loops and Flanking Sequences of G-Quadruplex Aptamer to the Hemagglutinin of Influenza a Virus. Int J Mol Sci 2021; 22:2409. [PMID: 33673708 PMCID: PMC7957560 DOI: 10.3390/ijms22052409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/21/2021] [Accepted: 02/24/2021] [Indexed: 12/22/2022] Open
Abstract
Nucleic acid aptamers are generally accepted as promising elements for the specific and high-affinity binding of various biomolecules. It has been shown for a number of aptamers that the complexes with several related proteins may possess a similar affinity. An outstanding example is the G-quadruplex DNA aptamer RHA0385, which binds to the hemagglutinins of various influenza A virus strains. These hemagglutinins have homologous tertiary structures but moderate-to-low amino acid sequence identities. Here, the experiment was inverted, targeting the same protein using a set of related, parallel G-quadruplexes. The 5'- and 3'-flanking sequences of RHA0385 were truncated to yield parallel G-quadruplex with three propeller loops that were 7, 1, and 1 nucleotides in length. Next, a set of minimal, parallel G-quadruplexes with three single-nucleotide loops was tested. These G-quadruplexes were characterized both structurally and functionally. All parallel G-quadruplexes had affinities for both recombinant hemagglutinin and influenza virions. In summary, the parallel G-quadruplex represents a minimal core structure with functional activity that binds influenza A hemagglutinin. The flanking sequences and loops represent additional features that can be used to modulate the affinity. Thus, the RHA0385-hemagglutinin complex serves as an excellent example of the hypothesis of a core structure that is decorated with additional recognizing elements capable of improving the binding properties of the aptamer.
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Affiliation(s)
- Anastasia A. Bizyaeva
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
| | - Dmitry A. Bunin
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
| | - Valeria L. Moiseenko
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
| | - Alexandra S. Gambaryan
- Chumakov Federal Scientific Centre for Research and Development of Immune and Biological Products RAS, 108819 Moscow, Russia;
| | | | - Vadim N. Tashlitsky
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
| | - Alexander M. Arutyunyan
- Belozersky Research Institute of Physical Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Alexey M. Kopylov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
| | - Elena G. Zavyalova
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (D.A.B.); (V.L.M.); (V.N.T.); (A.M.K.)
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Novoseltseva AA, Ivanov NM, Novikov RA, Tkachev YV, Bunin DA, Gambaryan AS, Tashlitsky VN, Arutyunyan AM, Kopylov AM, Zavyalova EG. Structural and Functional Aspects of G-Quadruplex Aptamers Which Bind a Broad Range of Influenza A Viruses. Biomolecules 2020; 10:biom10010119. [PMID: 31936820 PMCID: PMC7022617 DOI: 10.3390/biom10010119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/05/2020] [Accepted: 01/07/2020] [Indexed: 02/07/2023] Open
Abstract
An aptamer is a synthetic oligonucleotide with a unique spatial structure that provides specific binding to a target. To date, several aptamers to hemagglutinin of the influenza A virus have been described, which vary in affinity and strain specificity. Among them, the DNA aptamer RHA0385 is able to recognize influenza hemagglutinins with highly variable sequences. In this paper, the structure of RHA0385 was studied by circular dichroism spectroscopy, nuclear magnetic resonance, and size-exclusion chromatography, demonstrating the formation of a parallel G-quadruplex structure. Three derivatives of RHA0385 were designed in order to determine the contribution of the major loop to affinity. Shortening of the major loop from seven to three nucleotides led to stabilization of the scaffold. The affinities of the derivatives were studied by surface plasmon resonance and an enzyme-linked aptamer assay on recombinant hemagglutinins and viral particles, respectively. The alterations in the loop affected the binding to influenza hemagglutinin, but did not abolish it. Contrary to aptamer RHA0385, two of the designed aptamers were shown to be conformationally homogeneous, retaining high affinities and broad binding abilities for both recombinant hemagglutinins and whole influenza A viruses.
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Affiliation(s)
- Anastasia A. Novoseltseva
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
- Correspondence: ; Tel.: +7-495-939-3149
| | - Nikita M. Ivanov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
| | - Roman A. Novikov
- Engelhardt Institute of Molecular Biology RAS, 119991 Moscow, Russia; (R.A.N.)
| | - Yaroslav V. Tkachev
- Engelhardt Institute of Molecular Biology RAS, 119991 Moscow, Russia; (R.A.N.)
| | - Dmitry A. Bunin
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
| | - Alexandra S. Gambaryan
- Chumakov Federal Scientific Centre for Research and Development of Immune and Biological Products RAS, 108819 Moscow, Russia;
| | - Vadim N. Tashlitsky
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
| | - Alexander M. Arutyunyan
- Belozersky Research Institute of Physical Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey M. Kopylov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
| | - Elena G. Zavyalova
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.M.I.); (D.A.B.); (V.N.T.); (A.M.K.); (E.G.Z.)
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