1
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Lau MS, Hu Z, Zhao X, Tan YS, Liu J, Huang H, Yeo CJ, Leong HF, Grinchuk OV, Chan JK, Yan J, Tee WW. Transcriptional repression by a secondary DNA binding surface of DNA topoisomerase I safeguards against hypertranscription. Nat Commun 2023; 14:6464. [PMID: 37833256 PMCID: PMC10576097 DOI: 10.1038/s41467-023-42078-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
Regulation of global transcription output is important for normal development and disease, but little is known about the mechanisms involved. DNA topoisomerase I (TOP1) is an enzyme well-known for its role in relieving DNA supercoils for enabling transcription. Here, we report a non-enzymatic function of TOP1 that downregulates RNA synthesis. This function is dependent on specific DNA-interacting residues located on a conserved protein surface. A loss-of-function knock-in mutation on this surface, R548Q, is sufficient to cause hypertranscription and alter differentiation outcomes in mouse embryonic stem cells (mESCs). Hypertranscription in mESCs is accompanied by reduced TOP1 chromatin binding and change in genomic supercoiling. Notably, the mutation does not impact TOP1 enzymatic activity; rather, it diminishes TOP1-DNA binding and formation of compact protein-DNA structures. Thus, TOP1 exhibits opposing influences on transcription through distinct activities which are likely to be coordinated. This highlights TOP1 as a safeguard of appropriate total transcription levels in cells.
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Affiliation(s)
- Mei Sheng Lau
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore.
| | - Zhenhua Hu
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangzhou, China
- Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangzhou, China
- Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, Guangzhou, China
- The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaodan Zhao
- Department of Physics, National University of Singapore, Singapore, 117551, Singapore
- Centre for Bioimaging Sciences, National University of Singapore, Singapore, 117557, Singapore
| | - Yaw Sing Tan
- Bioinformatics Institute (BII), A*STAR, 30 Biopolis Street, Matrix, Singapore, 138671, Singapore
| | - Jinyue Liu
- Genome Institute of Singapore (GIS), A*STAR, 60 Biopolis Street, Genome, Singapore, 138672, Singapore
| | - Hua Huang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Electrophysiology Core Facility, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Clarisse Jingyi Yeo
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
| | - Hwei Fen Leong
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
| | - Oleg V Grinchuk
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
| | - Justin Kaixuan Chan
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
| | - Jie Yan
- Department of Physics, National University of Singapore, Singapore, 117551, Singapore.
- Centre for Bioimaging Sciences, National University of Singapore, Singapore, 117557, Singapore.
- Mechanobiology Institute, National University of Singapore, Singapore, 117411, Singapore.
| | - Wee-Wei Tee
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore.
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- NUS Centre for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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Dimethylmyricacene: An In Vitro and In Silico Study of a Semisynthetic Non-Camptothecin Derivative Compound, Targeting Human DNA Topoisomerase 1B. Cells 2022; 11:cells11213486. [DOI: 10.3390/cells11213486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022] Open
Abstract
Human topoisomerase 1B regulates the topological state of supercoiled DNA enabling all fundamental cell processes. This enzyme, which is the unique molecular target of the natural anticancer compound camptothecin, acts by nicking one DNA strand and forming a transient protein–DNA covalent complex. The interaction of human topoisomerase 1B and dimethylmyricacene, a compound prepared semisynthetically from myricanol extracted from Myrica cerifera root bark, was investigated using enzymatic activity assays and molecular docking procedures. Dimethylmyricacene was shown to inhibit both the cleavage and the religation steps of the enzymatic reaction, and cell viability of A-253, FaDu, MCF-7, HeLa and HCT-116 tumor cell lines.
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da Silva MM, Ribeiro GH, de Camargo MS, Ferreira AG, Ribeiro L, Barbosa MIF, Deflon VM, Castelli S, Desideri A, Corrêa RS, Ribeiro AB, Nicolella HD, Ozelin SD, Tavares DC, Batista AA. Ruthenium(II) Diphosphine Complexes with Mercapto Ligands That Inhibit Topoisomerase IB and Suppress Tumor Growth In Vivo. Inorg Chem 2021; 60:14174-14189. [PMID: 34477373 DOI: 10.1021/acs.inorgchem.1c01539] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Ruthenium(II) complexes (Ru1-Ru5), with the general formula [Ru(N-S)(dppe)2]PF6, bearing two 1,2-bis(diphenylphosphino)ethane (dppe) ligands and a series of mercapto ligands (N-S), have been developed. The combination of these ligands in the complexes endowed hydrophobic species with high cytotoxic activity against five cancer cell lines. For the A549 (lung) and MDA-MB-231 (breast) cancer cell lines, the IC50 values of the complexes were 288- to 14-fold lower when compared to cisplatin. Furthermore, the complexes were selective for the A549 and MDA-MB-231 cancer cell lines compared to the MRC-5 nontumor cell line. The multitarget character of the complexes was investigated by using calf thymus DNA (CT DNA), human serum albumin, and human topoisomerase IB (hTopIB). The complexes potently inhibited hTopIB. In particular, complex [Ru(dmp)(dppe)2]PF6 (Ru3), bearing the 4,6-diamino-2-mercaptopyrimidine (dmp) ligand, effectively inhibited hTopIB by acting on both the cleavage and religation steps of the catalytic cycle of this enzyme. Molecular docking showed that the Ru1-Ru5 complexes have binding affinity by active sites on the hTopI and hTopI-DNA, mainly via π-alkyl and alkyl hydrophobic interactions, as well as through hydrogen bonds. Complex Ru3 displayed significant antitumor activity against murine melanoma in mouse xenograph models, but this complex did not damage DNA, as revealed by Ames and micronucleus tests.
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Affiliation(s)
- Monize M da Silva
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Gabriel H Ribeiro
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Mariana S de Camargo
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Antônio G Ferreira
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Leandro Ribeiro
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Marília I F Barbosa
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Victor M Deflon
- Instituto de Química de São Carlos, Universidade de São Paulo, CEP 13565-905 São Carlos, São Paulo, Brazil
| | - Silvia Castelli
- Dipartimento di Biologia, Università Tor Vergata di Roma, 00133 Rome, Italy
| | | | - Rodrigo S Corrêa
- Departamento de Química, Universidade Federal de Ouro Preto, CEP 35400-000 Ouro Preto, Minas Gerais, Brazil
| | - Arthur B Ribeiro
- Universidade de Franca, CEP 14404-600, Franca, São Paulo, Brazil
| | | | - Saulo D Ozelin
- Universidade de Franca, CEP 14404-600, Franca, São Paulo, Brazil
| | - Denise C Tavares
- Universidade de Franca, CEP 14404-600, Franca, São Paulo, Brazil
| | - Alzir A Batista
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905 São Carlos, São Paulo, Brazil
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Soren BC, Babu Dasari J, Ottaviani A, Messina B, Andreotti G, Romeo A, Iacovelli F, Falconi M, Desideri A, Fiorani P. In Vitro and In Silico Characterization of an Antimalarial Compound with Antitumor Activity Targeting Human DNA Topoisomerase IB. Int J Mol Sci 2021; 22:7455. [PMID: 34299074 PMCID: PMC8306514 DOI: 10.3390/ijms22147455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 12/18/2022] Open
Abstract
Human DNA topoisomerase IB controls the topological state of supercoiled DNA through a complex catalytic cycle that consists of cleavage and religation reactions, allowing the progression of fundamental DNA metabolism. The catalytic steps of human DNA topoisomerase IB were analyzed in the presence of a drug, obtained by the open-access drug bank Medicines for Malaria Venture. The experiments indicate that the compound strongly and irreversibly inhibits the cleavage step of the enzyme reaction and reduces the cell viability of three different cancer cell lines. Molecular docking and molecular dynamics simulations suggest that the drug binds to the human DNA topoisomerase IB-DNA complex sitting inside the catalytic site of the enzyme, providing a molecular explanation for the cleavage-inhibition effect. For all these reasons, the aforementioned drug could be a possible lead compound for the development of an efficient anti-tumor molecule targeting human DNA topoisomerase IB.
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Affiliation(s)
- Bini Chhetri Soren
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Jagadish Babu Dasari
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Alessio Ottaviani
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Beatrice Messina
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Giada Andreotti
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Alice Romeo
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Federico Iacovelli
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Mattia Falconi
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Alessandro Desideri
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
| | - Paola Fiorani
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (B.C.S.); (J.B.D.); (B.M.); (G.A.); (A.R.); (F.I.); (M.F.); (A.D.); (P.F.)
- Institute of Translational Pharmacology, National Research Council, CNR, Via del Fosso del Cavaliere 100, 00133 Rome, Italy
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5
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Dasari JB, Soren BC, Ottaviani A, Tesauro C, Marino S, Messina B, Fiorani P. Swapping of The N-Terminal Domain of Human Topoisomerase 1B with the Corresponding Plasmodium Falciparum Counterpart Strongly Impairs Enzyme Activity. Rep Biochem Mol Biol 2020; 8:366-375. [PMID: 32582794 PMCID: PMC7275839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 06/03/2019] [Indexed: 06/11/2023]
Abstract
BACKGROUND DNA topoisomerases 1B are a class of ubiquitous enzyme that solves the topological problems associated with biological processes such as replication, transcription and recombination. Numerous sequence alignment of topoisomerase 1B from different species shows that the lengths of different domains as well as their amino acids sequences are quite different. In the present study a hybrid enzyme, generated by swapping the N-terminal of Plasmodium falciparum into the corresponding domain of the human, has been characterized. METHODS The chimeric enzyme was generated using different sets of PCR. The in vitro characterization was carried out using different DNA substrate including radio-labelled oligonucleotides. RESULTS The chimeric enzyme displayed slower relaxation activity, cleavage and re-ligation kinetics strongly perturbed when compared to the human enzyme. CONCLUSION These results indicate that the N-terminal domain has a crucial role in modulating topoisomerase activity in different species.
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Affiliation(s)
- Jagadish Babu Dasari
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
| | - Bini Chhetri Soren
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
| | - Alessio Ottaviani
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
- Institute of Translational Pharmacology, National Research Council, CNR, Via Del Fosso del Cavaliere 100, Rome 00133, Italy.
| | - Cinzia Tesauro
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
- Present address: Department of Molecular Biology and Genetics, University of Aarhus, C.F MøllersAllè 3, 8000 Aarhus C, Denmark.
| | - Simona Marino
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
| | - Beatrice Messina
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
| | - Paola Fiorani
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy.
- Institute of Translational Pharmacology, National Research Council, CNR, Via Del Fosso del Cavaliere 100, Rome 00133, Italy.
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da Silva MM, de Camargo MS, Correa RS, Castelli S, De Grandis RA, Takarada JE, Varanda EA, Castellano EE, Deflon VM, Cominetti MR, Desideri A, Batista AA. Non-mutagenic Ru(ii) complexes: cytotoxicity, topoisomerase IB inhibition, DNA and HSA binding. Dalton Trans 2019; 48:14885-14897. [DOI: 10.1039/c9dt01905g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein we discuss five ruthenium(ii) complexes with good cytotoxicity against cancer cells.
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Affiliation(s)
| | | | - Rodrigo S. Correa
- Departamento de Química
- Universidade Federal de Ouro Preto
- Ouro Preto
- Brazil
| | - Silvia Castelli
- Dipartimentodi Biologia
- UniversitàTorVergatadi Roma
- 00133 Rome
- Italy
| | - Rone A. De Grandis
- Departamento de Ciências Biológicas
- Faculdade de Ciências Farmacêuticas
- UNESP
- Araraquara
- Brazil
| | | | - Eliana A. Varanda
- Departamento de Ciências Biológicas
- Faculdade de Ciências Farmacêuticas
- UNESP
- Araraquara
- Brazil
| | | | - Victor M. Deflon
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Marcia R. Cominetti
- Departamento de Gerontologia
- Universidade Federal de São Carlos
- São Carlos
- Brazil
| | | | - Alzir A. Batista
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos
- Brazil
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Bansal S, Sur S, Tandon V. Benzimidazoles: Selective Inhibitors of Topoisomerase I with Differential Modes of Action. Biochemistry 2018; 58:809-817. [DOI: 10.1021/acs.biochem.8b01102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandhya Bansal
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Souvik Sur
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Vibha Tandon
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
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Castelli S, Gonçalves MB, Katkar P, Stuchi GC, Couto RAA, Petrilli HM, da Costa Ferreira AM. Comparative studies of oxindolimine-metal complexes as inhibitors of human DNA topoisomerase IB. J Inorg Biochem 2018; 186:85-94. [PMID: 29860208 DOI: 10.1016/j.jinorgbio.2018.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/18/2018] [Accepted: 05/20/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Marcos Brown Gonçalves
- Departamento de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba, PR, Brazil
| | - Prafulla Katkar
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Gabriela Cristina Stuchi
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Ricardo Alexandre Alves Couto
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Helena Maria Petrilli
- Departamento de Física dos Materiais e Mecânica, Instituto de Física, Universidade de São Paulo, 05508-090 São Paulo, SP, Brazil
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil.
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9
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Bali SK, Marion A, Ugur I, Dikmenli AK, Catak S, Aviyente V. Activity of Topotecan toward the DNA/Topoisomerase I Complex: A Theoretical Rationalization. Biochemistry 2018; 57:1542-1551. [DOI: 10.1021/acs.biochem.7b01297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Semiha Kevser Bali
- Department of Chemistry, Faculty of Arts and Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
| | - Antoine Marion
- Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
| | - Ilke Ugur
- Department of Lifesciences, Technical University of Munich, 80333 Munich, Germany
| | - Ayse Kumru Dikmenli
- Department of Chemistry and Chemical Biology, MacMaster University, Hamilton, Ontario L8S4L8, Canada
| | - Saron Catak
- Department of Chemistry, Faculty of Arts and Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
| | - Viktorya Aviyente
- Department of Chemistry, Faculty of Arts and Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
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10
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Zhang P, Zhang L, Zhang Y, Mao L, Jiang H. Substitutions in Spodoptera exigua topoisomerase I modulate its relaxation activity and camptothecin sensitivity. PEST MANAGEMENT SCIENCE 2017; 73:1179-1186. [PMID: 27643798 DOI: 10.1002/ps.4440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/25/2016] [Accepted: 09/12/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Topoisomerase I (Top I) is referred as the cellular target of the camptothecins (CPTs) which are now being explored as potential pesticides for insect control. Three amino acid substitutions, including L530P, A653T and S729T, in Top Is of insects were found in our previous studies. In order to investigate the effect of these three substitutions, a comparative analysis was conducted between the wild-type and mutant Top Is in Spodoptera exigua Hübner. RESULTS The optimal salt concentration of A653T and S729T was 150 mm, which is consistent with that of the wild-type Top I, while the mutant L530P showed maximum relaxation activity at a lower KCl concentration (100 mm). The mutated L530P and A653T Top Is showed a higher relaxation efficiency owing to an increased relaxation velocity toward the negatively supercoiled plasmid pBR322 DNA, which rendered L530P and A653T resistant to CPTs, whereas mutant S729T exhibited sensitivity to CPTs as a result of a decreased relaxation activity toward plasmid pBR322 DNA. CONCLUSIONS These results suggested that the polymorphism in Top I of insects was related to the biological activity of CPTs, which provided the basic information for reasonable usage of CPTs to control insect pests. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Pei Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lan Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanning Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Liangang Mao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hongyun Jiang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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11
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De Grandis RA, de Camargo MS, da Silva MM, Lopes ÉO, Padilha EC, Resende FA, Peccinini RG, Pavan FR, Desideri A, Batista AA, Varanda EA. Human topoisomerase inhibition and DNA/BSA binding of Ru(II)-SCAR complexes as potential anticancer candidates for oral application. Biometals 2017; 30:321-334. [PMID: 28303361 DOI: 10.1007/s10534-017-0008-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 03/07/2017] [Indexed: 01/14/2023]
Abstract
Three ruthenium(II) phosphine/diimine/picolinate complexes were selected aimed at investigating anticancer activity against several cancer cell lines and the capacity of inhibiting the supercoiled DNA relaxation mediated by human topoisomerase IB (Top 1). The structure-lipophilicity relationship in membrane permeability using the Caco-2 cells have also been evaluated in this study. SCAR 5 was found to present 45 times more cytotoxicity against breast cancer cell when compared to cisplatin. SCAR 4 and 5 were both found to be capable of inhibiting the supercoiled DNA relaxation mediated by Top 1. Interaction studies showed that SCAR 4 and 5 can bind to DNA through electrostatic interactions while SCAR 6 is able to bind covalently to DNA. The complexes SCAR were found to interact differently with bovine serum albumin (BSA) suggesting hydrophobic interactions with albumin. The permeability of all complexes was seen to be dependent on their lipophilicity. SCAR 4 and 5 exhibited high membrane permeability (P app > 10 × 10-6 cm·s-1) in the presence of BSA. The complexes may pass through Caco-2 monolayer via passive diffusion mechanism and our results suggest that lipophilicity and interaction with BSA may influence the complexes permeation. In conclusion, we demonstrated that complexes have powerful pharmacological activity, with different results for each complex depending on the combination of their ligands.
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Affiliation(s)
- Rone A De Grandis
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil.
| | - Mariana S de Camargo
- Center of Exact Sciences and Technology, Federal University of São Carlos, São Carlos, 13565-905, Brazil
| | - Monize M da Silva
- Center of Exact Sciences and Technology, Federal University of São Carlos, São Carlos, 13565-905, Brazil
| | - Érica O Lopes
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil
| | - Elias C Padilha
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil
| | - Flávia A Resende
- Department of Health and Biological Sciences, University of Araraquara, Araraquara, 14801-340, Brazil.
| | - Rosângela G Peccinini
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil
| | | | - Alzir A Batista
- Center of Exact Sciences and Technology, Federal University of São Carlos, São Carlos, 13565-905, Brazil
| | - Eliana A Varanda
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, 14800-903, Brazil
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12
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Andersen MB, Tesauro C, Gonzalez M, Kristoffersen EL, Alonso C, Rubiales G, Coletta A, Frøhlich R, Stougaard M, Ho YP, Palacios F, Knudsen BR. Advantages of an optical nanosensor system for the mechanistic analysis of a novel topoisomerase I targeting drug: a case study. NANOSCALE 2017; 9:1886-1895. [PMID: 28094391 DOI: 10.1039/c6nr06848k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The continuous need for the development of new small molecule anti-cancer drugs calls for easily accessible sensor systems for measuring the effect of vast numbers of new drugs on their potential cellular targets. Here we demonstrate the use of an optical DNA biosensor to unravel the inhibitory mechanism of a member of a new family of small molecule human topoisomerase I inhibitors, the so-called indeno-1,5-naphthyridines. By analysing human topoisomerase I catalysis on the biosensor in the absence or presence of added drug complemented with a few traditional assays, we demonstrate that the investigated member of the indeno-1,5-naphthyridine family inhibited human topoisomerase I activity by blocking enzyme-DNA dissociation. To our knowledge, this represents the first characterized example of a small molecule drug that inhibits a post-ligation step of catalysis. The elucidation of a completely new and rather surprising drug mechanism-of-action using an optical real time sensor highlights the value of this assay system in the search for new topoisomerase I targeting small molecule drugs.
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Affiliation(s)
- Marie B Andersen
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark.
| | - Cinzia Tesauro
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark.
| | - María Gonzalez
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Emil L Kristoffersen
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark.
| | - Concepción Alonso
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Gloria Rubiales
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Andrea Coletta
- Department of Chemistry, Langelandsgade 140, Aarhus University, 8000 Aarhus C, Denmark
| | - Rikke Frøhlich
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark.
| | - Magnus Stougaard
- Department of Pathology, Nørrebrogade 44 building 18B, Aarhus University, Denmark
| | - Yi-Ping Ho
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark. and Interdisciplinary Nanoscience Center, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark and Division of Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Francisco Palacios
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Birgitta R Knudsen
- Department of Molecular Biology and Genetics, C. F. Møllers Allé 3, Bldg 1131, Aarhus University, 8000 Aarhus C, Denmark.
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13
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Affiliation(s)
- Giovanni Capranico
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
8/2, 40126 Bologna, Italy
| | - Jessica Marinello
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
8/2, 40126 Bologna, Italy
| | - Giovanni Chillemi
- SCAI
SuperComputing Applications and Innovation Department, Cineca, Via dei Tizii 6, 00185 Rome, Italy
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14
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de Camargo MS, da Silva MM, Correa RS, Vieira SD, Castelli S, D'Anessa I, De Grandis R, Varanda E, Deflon VM, Desideri A, Batista AA. Inhibition of human DNA topoisomerase IB by nonmutagenic ruthenium(II)-based compounds with antitumoral activity. Metallomics 2016; 8:179-92. [PMID: 26758075 DOI: 10.1039/c5mt00227c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Herein we synthesized two new ruthenium(II) compounds [Ru(pySH)(bipy)(dppb)]PF6 (1) and [Ru(HSpym)(bipy)(dppb)]PF6 (2) that are analogs to an antitumor agent recently described, [Ru(SpymMe2)(bipy)(dppb)]PF6 (3), where [(Spy) = 2-mercaptopyridine anion; (Spym) = 2-mercaptopyrimidine anion and (SpymMe2) = 4,6-dimethyl-2-mercaptopyrimidine anion]. In vitro cell culture experiments revealed significant anti-proliferative activity for 1-3 against HepG2 and MDA-MB-231 tumor cells, higher than the standard anti-cancer drugs doxorubicin and cisplatin. No mutagenicity is detected when compounds are evaluated by cytokinesis-blocked micronucleus cytome and Ames test in the presence and absence of S9 metabolic activation from rat liver. Interaction studies show that compounds 1-3 can bind to DNA through electrostatic interactions and to albumin through hydrophobic interactions. The three compounds are able to inhibit the DNA supercoiled relaxation mediated by human topoisomerase IB (Top1). Compound 3 is the most efficient Top1 inhibitor and the inhibitory effect is enhanced upon pre-incubation with the enzyme. Analysis of different steps of Top1 catalytic cycle indicates that 3 inhibits the cleavage reaction impeding the binding of the enzyme to DNA and slows down the religation reaction. Molecular docking shows that 3 preferentially binds closer to the residues of the active site when Top1 is free and lies on the DNA groove downstream of the cleavage site in the Top1-DNA complex. Thus, 3 can be considered in further studies for a possible use as an anticancer agent.
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Affiliation(s)
- Mariana S de Camargo
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905, São Carlos, SP, Brazil.
| | - Monize M da Silva
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905, São Carlos, SP, Brazil.
| | - Rodrigo S Correa
- Departamento de Química, ICEB, Universidade Federal de Ouro Preto, CEP 35400-000, Ouro Preto, MG, Brazil
| | - Sara D Vieira
- Dipartimento di Biologia, Università Tor Vergata di Roma, 00133 Rome, Italy
| | - Silvia Castelli
- Dipartimento di Biologia, Università Tor Vergata di Roma, 00133 Rome, Italy
| | - Ilda D'Anessa
- Dipartimento di Biologia, Università Tor Vergata di Roma, 00133 Rome, Italy
| | - Rone De Grandis
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, UNESP, CEP 14800-900, Araraquara, SP, Brazil
| | - Eliana Varanda
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, UNESP, CEP 14800-900, Araraquara, SP, Brazil
| | - Victor M Deflon
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil
| | | | - Alzir A Batista
- Departamento de Química, Universidade Federal de São Carlos, CP 676, CEP 13565-905, São Carlos, SP, Brazil.
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15
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Bansal S, Bajaj P, Pandey S, Tandon V. Topoisomerases: Resistance versus Sensitivity, How Far We Can Go? Med Res Rev 2016; 37:404-438. [PMID: 27687257 DOI: 10.1002/med.21417] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/04/2016] [Accepted: 08/29/2016] [Indexed: 12/15/2022]
Abstract
DNA topoisomerases are ubiquitously present remarkable molecular machines that help in altering topology of DNA in living cells. The crucial role played by these nucleases during DNA replication, transcription, and recombination vis-à-vis less sequence similarity among different species makes topoisomerases unique and attractive targets for different anticancer and antibacterial drugs. However, druggability of topoisomerases by the existing class of molecules is increasingly becoming questationable due to resistance development predominated by mutations in the corresponding genes. The current scenario facing a decline in the development of new molecules further comprises an important factor that may challenge topoisomerase-targeting therapy. Thus, it is imperative to wisely use the existing inhibitors lest with this rapid rate of losing grip over the target we may not go too far. Furthermore, it is important not only to design new molecules but also to develop new approaches that may avoid obstacles in therapies due to multiple resistance mechanisms. This review provides a succinct account of different classes of topoisomerase inhibitors, focuses on resistance acquired by mutations in topoisomerases, and discusses the various approaches to increase the efficacy of topoisomerase inhibitors. In a later section, we also suggest the possibility of using bisbenzimidazoles along with efflux pump inhibitors for synergistic bactericidal effects.
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Affiliation(s)
- Sandhya Bansal
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, New Delhi, India
| | - Priyanka Bajaj
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Stuti Pandey
- Department of Chemistry, University of Delhi, New Delhi, India
| | - Vibha Tandon
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.,Department of Chemistry, University of Delhi, New Delhi, India
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16
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Girstun A, Ishikawa T, Kowalska-Loth B, Czubaty A, Staron K. Subnuclear Localization of Human Topoisomerase I. J Cell Biochem 2016; 118:407-419. [DOI: 10.1002/jcb.25654] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/14/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Agnieszka Girstun
- Department of Molecular Biology; Institute of Biochemistry; Faculty of Biology; University of Warsaw; Warsaw Poland
| | - Takao Ishikawa
- Department of Molecular Biology; Institute of Biochemistry; Faculty of Biology; University of Warsaw; Warsaw Poland
| | - Barbara Kowalska-Loth
- Department of Molecular Biology; Institute of Biochemistry; Faculty of Biology; University of Warsaw; Warsaw Poland
| | - Alicja Czubaty
- Department of Molecular Biology; Institute of Biochemistry; Faculty of Biology; University of Warsaw; Warsaw Poland
| | - Krzysztof Staron
- Department of Molecular Biology; Institute of Biochemistry; Faculty of Biology; University of Warsaw; Warsaw Poland
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17
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Vutey V, Castelli S, D'Annessa I, Sâmia LBP, Souza-Fagundes EM, Beraldo H, Desideri A. Human topoisomerase IB is a target of a thiosemicarbazone copper(II) complex. Arch Biochem Biophys 2016; 606:34-40. [PMID: 27431056 DOI: 10.1016/j.abb.2016.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/30/2016] [Accepted: 07/12/2016] [Indexed: 02/03/2023]
Abstract
The human topoisomerase IB inhibition and the antiproliferative activity of 3-(4-bromophenyl)-1-pyridin-2-ylprop-2-en-1-one thiosemicarbazone HPyCT4BrPh alone and its copper(II) complex [Cu(PyCT4BrPh)Cl] was investigated. [Cu(PyCT4BrPh)Cl] inhibits both the DNA cleavage and religation step of the enzyme, whilst the ligand alone does not display any effect. In addition we show that coordination to copper(II) improves the cytotoxicity of HPyCT4BrPh against THP-1 leukemia and MCF-7 breast cancer cells. The data indicate that the copper(II) thiosemicarbazone complex may hit human topoisomerase IB and that metal coordination can be useful to improve cytotoxicity of this versatile class of compounds.
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Affiliation(s)
- Venn Vutey
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Ilda D'Annessa
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Luciana B P Sâmia
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine M Souza-Fagundes
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Heloisa Beraldo
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil
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18
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Metal complexes of 3-(4-bromophenyl)-1-pyridin-2-ylprop-2-en-1-one thiosemicarbazone: cytotoxic activity and investigation on the mode of action of the gold(III) complex. Biometals 2016; 29:515-26. [DOI: 10.1007/s10534-016-9933-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 04/05/2016] [Indexed: 12/28/2022]
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19
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Bongiorni S, Valentini A, Chillemi G. Structural and Dynamic Characterization of the C313Y Mutation in Myostatin Dimeric Protein, Responsible for the "Double Muscle" Phenotype in Piedmontese Cattle. Front Genet 2016; 7:14. [PMID: 26904102 PMCID: PMC4749705 DOI: 10.3389/fgene.2016.00014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/26/2016] [Indexed: 11/25/2022] Open
Abstract
The knowledge of the molecular effects of the C313Y mutation, responsible for the “double muscle” phenotype in Piedmontese cattle, can help understanding the actual mechanism of phenotype determination and paves the route for a better modulation of the positive effects of this economic important phenotype in the beef industry, while minimizing the negative side effects, now inevitably intersected. The structure and dynamic behavior of the active dimeric form of Myostatin in cattle was analyzed by means of three state-of-the-art Molecular Dynamics simulations, 200-ns long, of wild-type and C313Y mutants. Our results highlight a role for the conserved Arg333 in establishing a network of short and long range interactions between the two monomers in the wild-type protein that is destroyed upon the C313Y mutation even in a single monomer. Furthermore, the native protein shows an asymmetry in residue fluctuation that is absent in the double monomer mutant. Time window analysis on further 200-ns of simulation demonstrates that this is a characteristic behavior of the protein, likely dependent on long range communications between monomers. The same behavior, in fact, has already been observed in other mutated dimers. Finally, the mutation does not produce alterations in the secondary structure elements that compose the characteristic TGF-β cystine-knot motif.
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Affiliation(s)
- Silvia Bongiorni
- Department for Innovation in Biological, Agro-food and Forest systems, University of Tuscia Viterbo, Italy
| | - Alessio Valentini
- Department for Innovation in Biological, Agro-food and Forest systems, University of Tuscia Viterbo, Italy
| | - Giovanni Chillemi
- Department of SuperComputing Applications and Innovation, Cineca Rome, Italy
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20
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León IE, Cadavid-Vargas JF, Tiscornia I, Porro V, Castelli S, Katkar P, Desideri A, Bollati-Fogolin M, Etcheverry SB. Oxidovanadium(IV) complexes with chrysin and silibinin: anticancer activity and mechanisms of action in a human colon adenocarcinoma model. J Biol Inorg Chem 2015; 20:1175-91. [PMID: 26404080 DOI: 10.1007/s00775-015-1298-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 09/07/2015] [Indexed: 12/16/2022]
Abstract
Vanadium compounds were studied during recent years to be considered as a representative of a new class of nonplatinum metal antitumor agents in combination to its low toxicity. On the other hand, flavonoids are a wide family of polyphenolic compounds synthesized by plants that display many interesting biological effects. Since coordination of ligands to metals can improve the pharmacological properties, we report herein, for the first time, a exhaustive study of the mechanisms of action of two oxidovanadium(IV) complexes with the flavonoids: silibinin Na₂[VO(silibinin)₂2]·6H₂O (VOsil) and chrysin [VO(chrysin)₂EtOH]₂(VOchrys) on human colon adenocarcinoma derived cell line HT-29. The complexes inhibited the cell viability of colon adenocarcinoma cells in a dose dependent manner with a greater potency than that the free ligands and free metal, demonstrating the benefit of complexation. The decrease of the ratio of the amount of reduced glutathione to the amount of oxidized glutathione were involved in the deleterious effects of both complexes. Besides, VOchrys caused cell cycle arrest in G2/M phase while VOsil activated caspase 3 and triggering the cells directly to apoptosis. Moreover, VOsil diminished the NF-kB activation via increasing the sensitivity of cells to apoptosis. On the other hand, VOsil inhibited the topoisomerase IB activity concluding that this is important target involved in the anticancer vanadium effects. As a whole, the results presented herein demonstrate that VOsil has a stronger deleterious action than VOchrys on HT-29 cells, whereby suggesting that Vosil is the potentially best candidate for future use in alternative anti-tumor treatments.
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Affiliation(s)
- I E León
- Cátedra de Bioquímica Patológica, Facultad Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina.,Centro de Química Inorgánica (CEQUINOR-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - J F Cadavid-Vargas
- Cátedra de Bioquímica Patológica, Facultad Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina.,Centro de Química Inorgánica (CEQUINOR-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - I Tiscornia
- Unidad de Biología Celular, Institut Pasteur de Montevideo, Mataojo 2020, 11400, Montevideo, Uruguay
| | - V Porro
- Unidad de Biología Celular, Institut Pasteur de Montevideo, Mataojo 2020, 11400, Montevideo, Uruguay
| | - S Castelli
- Department of Biology, University of Rome "Tor Vergata", Rome, Italy
| | - P Katkar
- Department of Biology, University of Rome "Tor Vergata", Rome, Italy
| | - A Desideri
- Department of Biology, University of Rome "Tor Vergata", Rome, Italy
| | - M Bollati-Fogolin
- Unidad de Biología Celular, Institut Pasteur de Montevideo, Mataojo 2020, 11400, Montevideo, Uruguay
| | - S B Etcheverry
- Cátedra de Bioquímica Patológica, Facultad Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina. .,Centro de Química Inorgánica (CEQUINOR-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina.
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21
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Huang NL, Lin JH. Recovery of the poisoned topoisomerase II for DNA religation: coordinated motion of the cleavage core revealed with the microsecond atomistic simulation. Nucleic Acids Res 2015; 43:6772-86. [PMID: 26150421 PMCID: PMC4538842 DOI: 10.1093/nar/gkv672] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 06/19/2015] [Indexed: 01/24/2023] Open
Abstract
Type II topoisomerases resolve topological problems of DNA double helices by passing one duplex through the reversible double-stranded break they generated on another duplex. Despite the wealth of information in the cleaving operation, molecular understanding of the enzymatic DNA ligation remains elusive. Topoisomerase poisons are widely used in anti-cancer and anti-bacterial therapy and have been employed to entrap the intermediates of topoisomerase IIβ with religatable DNA substrate. We removed drug molecules from the structure and conducted molecular dynamics simulations to investigate the enzyme-mediated DNA religation. The drug-unbound intermediate displayed transitions toward the resealing-compliant configuration: closing distance between the cleaved DNA termini, B-to-A transformation of the double helix, and restoration of the metal-binding motif. By mapping the contact configurations and the correlated motions between enzyme and DNA, we identified the indispensable role of the linker preceding winged helix domain (WHD) in coordinating the movements of TOPRIM, the nucleotide-binding motifs, and the bound DNA substrate during gate closure. We observed a nearly vectorial transition in the recovery of the enzyme and identified the previously uncharacterized roles of Asn508 and Arg677 in DNA rejoining. Our findings delineate the dynamic mechanism of the DNA religation conducted by type II topoisomerases.
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Affiliation(s)
- Nan-Lan Huang
- Research Center for Applied Sciences, Academia Sinica, Nangang, Taipei 11529, Taiwan
| | - Jung-Hsin Lin
- Research Center for Applied Sciences, Academia Sinica, Nangang, Taipei 11529, Taiwan Institute of Biomedical Sciences, Academia Sinica, Nangang, Taipei 11529, Taiwan School of Pharmacy, National Taiwan University, Taipei 10050, Taiwan
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22
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Wang Z, D'Annessa I, Tesauro C, Croce S, Ottaviani A, Fiorani P, Desideri A. Mutation of Gly717Phe in human topoisomerase 1B has an effect on enzymatic function, reactivity to the camptothecin anticancer drug and on the linker domain orientation. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:860-8. [PMID: 25910424 DOI: 10.1016/j.bbapap.2015.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 03/27/2015] [Accepted: 04/15/2015] [Indexed: 10/23/2022]
Abstract
Human topoisomerase 1B controls the topological state of supercoiled DNA allowing the progression of fundamental cellular processes. The enzyme, which is the unique molecular target of the natural anticancer compound camptothecin, acts by cleaving one DNA strand and forming a transient protein-DNA covalent adduct. In this work the role of the Gly717 residue, located in a α-helix structure bridging the active site and the linker domain, has been investigated mutating it in Phe. The mutation gives rise to drug resistance in vivo as observed through a viability assay of yeast cells. In vitro activity assays show that the mutant is characterized by a fast religation rate, only partially reduced by the presence of the drug. Comparative molecular dynamics simulations of the native and mutant proteins indicate that the mutation of Gly717 affects the motion orientation of the linker domain, changing its interaction with the DNA substrate, likely affecting the strand rotation and religation rate. The mutation also causes a slight rearrangement of the active site and of the drug binding site, providing an additional explanation for the lowered effect of camptothecin toward the mutant.
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Affiliation(s)
- Zhenxing Wang
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Ilda D'Annessa
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Cinzia Tesauro
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Stefano Croce
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Alessio Ottaviani
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Paola Fiorani
- Institute of Translational Pharmacology, National Research Council, CNR, Via Del Fosso del Cavaliere 100, 00133 Rome, Italy.
| | - Alessandro Desideri
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy.
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23
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Katkar P, Coletta A, Castelli S, Sabino GL, Couto RAA, Ferreira AMDC, Desideri A. Effect of oxindolimine copper(II) and zinc(II) complexes on human topoisomerase I activity. Metallomics 2014; 6:117-25. [PMID: 24172750 DOI: 10.1039/c3mt00099k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ability of oxindolimine copper(II) and zinc(II) complexes, known to have antitumor activity, to inhibit human topoisomerase IB has been tested through enzymatic kinetic assays and molecular docking simulations. These copper and zinc compounds are able to inhibit remarkably the cleavage reaction and only partially the religation step, the copper compound being more efficient than the zinc one. A complete inhibition activity of the cleavage is only obtained when the enzyme is pre-incubated with the compound, the inhibition being irreversible and reversible for the copper and zinc compounds, respectively. The relative stability of such complexes was estimated by competitive equilibria with human serum albumin (HSA), monitored by CD spectroscopy. The copper species shows a log KCuL = 17.2, while the analogous zinc complex exhibits a log KZnL = 7.2. Molecular docking simulation studies show that the almost square planar geometry of the copper compound allows a direct coordination of the metal with two amino acids (Glu492, Asp563) of the enzyme at variance of the zinc compound which has a more tetrahedral geometry. Altogether, the data indicate that the different coordination geometry achieved by the two transition metal ions has an important role in modulating their efficiency as topoisomerase I inhibitors.
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Affiliation(s)
- Prafulla Katkar
- Dipartimento di Biologia, Università Tor Vergata di Roma, 00173 Roma, Italy.
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24
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Siu FM, Pommier Y. Sequence selectivity of the cleavage sites induced by topoisomerase I inhibitors: a molecular dynamics study. Nucleic Acids Res 2013; 41:10010-9. [PMID: 24021629 PMCID: PMC3905861 DOI: 10.1093/nar/gkt791] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Topoisomerase IB (Top1) inhibitors, such as camptothecin (CPT), stabilize the Top1-DNA cleavage complex in a DNA sequence-dependent manner. The sequence selectivity of Top1 inhibitors is important for targeting specific genomic sequences of therapeutic value. However, the molecular mechanisms underlying this selectivity remain largely unknown. We performed molecular dynamics simulations to delineate structural, dynamic and energetic features that contribute to the differential sequence selectivity of the Top1 inhibitors. We found the sequence selectivity of CPT to be highly correlated with the drug binding energies, dynamic and structural properties of the linker domain. Chemical insights, gained by per-residue binding energy analysis revealed that the non-polar interaction between CPT and nucleotide at the +1 position of the cleavage site was the major (favorable) contributor to the total binding energy. Mechanistic insights gained by a potential of mean force analysis implicated that the drug dissociation step was associated with the sequence selectivity. Pharmaceutical insights gained by our molecular dynamics analyses explained why LMP-776, an indenoisoquinoline derivative under clinical development at the National Institutes of Health, displays different sequence selectivity when compared with camptothecin and its clinical derivatives.
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Affiliation(s)
- Fung-Ming Siu
- Center for High Performance Computing, Institute of Advanced Computing and Digital Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Boulevard, University Town of Shenzhen, Xili Nanshan, Shenzhen 518055, China, Department of Chemistry and Institutes of Molecular Technology for Drug Discovery and Synthesis, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
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Coletta A, Desideri A. Role of the protein in the DNA sequence specificity of the cleavage site stabilized by the camptothecin topoisomerase IB inhibitor: a metadynamics study. Nucleic Acids Res 2013; 41:9977-86. [PMID: 24003027 PMCID: PMC3905883 DOI: 10.1093/nar/gkt790] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Camptothecin (CPT) is a topoisomerase IB (TopIB) selective inhibitor whose derivatives are currently used in cancer therapy. TopIB cleaves DNA at any sequence, but in the presence of CPT the only stabilized protein–DNA covalent complex is the one having a thymine in position −1 with respect to the cleavage site. A metadynamics simulation of two TopIB–DNA–CPT ternary complexes differing for the presence of a thymine or a cytosine in position −1 indicates the occurrence of two different drug’s unbinding pathways. The free-energy difference between the bound state and the transition state is large when a thymine is present in position −1 and is strongly reduced in presence of a cytosine, in line with the different drug stabilization properties of the two systems. Such a difference is strictly related to the changes in the hydrogen bond network between the protein, the DNA and the drug in the two systems, indicating a direct role of the protein in determining the specificity of the cleavage site sequence stabilized by the CPT. Calculations carried out in presence of one compound of the indenoisoquinoline family (NSC314622) indicate a comparable energy difference between the bound and the transition state independently of the presence of a thymine or a cytosine in position −1, in line with the experimental results.
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Affiliation(s)
- Andrea Coletta
- Dipartimento di Biologia, Universitá degli Studi di Roma 'Tor Vergata', Via della Ricerca Scientifica, 00133 Roma, Italy
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Tesauro C, Morozzo della Rocca B, Ottaviani A, Coletta A, Zuccaro L, Arnò B, D'Annessa I, Fiorani P, Desideri A. Molecular mechanism of the camptothecin resistance of Glu710Gly topoisomerase IB mutant analyzed in vitro and in silico. Mol Cancer 2013; 12:100. [PMID: 24004603 PMCID: PMC3766703 DOI: 10.1186/1476-4598-12-100] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 08/13/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND DNA topoisomerases are key enzymes that modulate the topological state of DNA through the breaking and rejoining of DNA strands. Human topoisomerase IB can be inhibited by several compounds that act through different mechanisms, including clinically used drugs, such as the derivatives of the natural compound camptothecin that reversibly bind the covalent topoisomerase-DNA complex, slowing down the religation of the cleaved DNA strand, thus inducing cell death. Three enzyme mutations, which confer resistance to irinotecan in an adenocarcinoma cell line, were recently identified but the molecular mechanism of resistance was unclear. METHODS The three resistant mutants have been investigated in S. cerevisiae model system following their viability in presence of increasing amounts of camptothecin. A systematical analysis of the different catalytic steps has been made for one of these mutants (Glu710Gly) and has been correlated with its structural-dynamical properties studied by classical molecular dynamics simulation. RESULTS The three mutants display a different degree of camptothecin resistance in a yeast cell viability assay. Characterization of the different steps of the catalytic cycle of the Glu710Gly mutant indicated that its resistance is related to a high religation rate that is hardly affected by the presence of the drug. Analysis of the dynamic properties through simulation indicate that the mutant displays a much lower degree of correlation in the motion between the different protein domains and that the linker almost completely loses its correlation with the C-terminal domain, containing the active site tyrosine. CONCLUSIONS These results indicate that a fully functional linker is required to confer camptothecin sensitivity to topoisomerase I since the destabilization of its structural-dynamical properties is correlated to an increase of religation rate and drug resistance.
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Affiliation(s)
- Cinzia Tesauro
- Department of Biology and Interuniversity Consortium, National Institute Biostructures and Biosystems (INBB), University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133 Italy.
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Arnò B, D’Annessa I, Tesauro C, Zuccaro L, Ottaviani A, Knudsen B, Fiorani P, Desideri A. Replacement of the human topoisomerase linker domain with the plasmodial counterpart renders the enzyme camptothecin resistant. PLoS One 2013; 8:e68404. [PMID: 23844196 PMCID: PMC3699648 DOI: 10.1371/journal.pone.0068404] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 05/29/2013] [Indexed: 12/17/2022] Open
Abstract
A human/plasmodial hybrid enzyme, generated by swapping the human topoisomerase IB linker domain with the corresponding domain of the Plasmodium falciparum enzyme, has been produced and characterized. The hybrid enzyme displays a relaxation activity comparable to the human enzyme, but it is characterized by a much faster religation rate. The hybrid enzyme is also camptothecin resistant. A 3D structure of the hybrid enzyme has been built and its structural-dynamical properties have been analyzed by molecular dynamics simulation. The analysis indicates that the swapped plasmodial linker samples a conformational space much larger than the corresponding domain in the human enzyme. The large linker conformational variability is then linked to important functional properties such as an increased religation rate and a low drug reactivity, demonstrating that the linker domain has a crucial role in the modulation of the topoisomerase IB activity.
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Affiliation(s)
- Barbara Arnò
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
| | - Ilda D’Annessa
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
| | - Cinzia Tesauro
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
| | - Laura Zuccaro
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
| | - Alessio Ottaviani
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
| | - Birgitta Knudsen
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Paola Fiorani
- Institute of Translational Pharmacology, National Research Council, CNR, Rome, Italy
| | - Alessandro Desideri
- Department of Biology and Interuniversity Consortium, National Institute Biostructure and Biosystem (INBB), University of Rome Tor Vergata, Rome, Italy
- * E-mail:
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Jahan Z, Castelli S, Aversa G, Rufini S, Desideri A, Giovanetti A. Role of human topoisomerase IB on ionizing radiation induced damage. Biochem Biophys Res Commun 2013; 432:545-8. [DOI: 10.1016/j.bbrc.2013.02.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 02/10/2013] [Indexed: 10/27/2022]
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Inhibition of human DNA topoisomerase IB by a Cyclometalated Gold III compound: Analysis on the different steps of the enzyme catalytic cycle. Arch Biochem Biophys 2011; 516:108-12. [DOI: 10.1016/j.abb.2011.10.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 10/10/2011] [Accepted: 10/12/2011] [Indexed: 01/24/2023]
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Mancini G, D'Annessa I, Coletta A, Sanna N, Chillemi G, Desideri A. Structural and dynamical effects induced by the anticancer drug topotecan on the human topoisomerase I - DNA complex. PLoS One 2010; 5:e10934. [PMID: 20532182 PMCID: PMC2880615 DOI: 10.1371/journal.pone.0010934] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Accepted: 05/06/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Human topoisomerase I catalyzes the relaxation of DNA supercoils in fundamental cell processes like transcription, replication and chromosomal segregation. It is the only target of the camptothecin family of anticancer drugs. Among these, topotecan has been used to treat lung and ovarian carcinoma for several years. Camptothecins reversibly binds to the covalent intermediate DNA-enzyme, stabilizing the cleavable complex and reducing the religation rate. The stalled complex then collides with the progression of the replication fork, producing lethal double strand DNA breaks and eventually cell death. METHODOLOGY/PRINCIPAL FINDINGS Long lasting molecular dynamics simulations of the DNA-topoisomerase I binary complex and of the DNA-topoisomerase-topotecan ternary complex have been performed and compared. The conformational space sampled by the binary complex is reduced by the presence of the drug, as observed by principal component and cluster analyses. This conformational restraint is mainly due to the reduced flexibility of residues 633-643 (the region connecting the linker to the core domain) that causes an overall mobility loss in the ternary complex linker domain. During the simulation, DNA/drug stacking interactions are fully maintained, and hydrogen bonds are maintained with the enzyme. Topotecan keeps the catalytic residue Lys532 far from the DNA, making it unable to participate to the religation reaction. Arg364 is observed to interact with both the B and E rings of topotecan with two stable direct hydrogen bonds. An interesting constrain exerted by the protein on the geometrical arrangement of topotecan is also observed. CONCLUSIONS/SIGNIFICANCE Atomistic-scale understanding of topotecan interactions with the DNA-enzyme complex is fundamental to the explaining of its poisonous effect and of the drug resistance observed in several single residue topoisomerase mutants. We observed significant alterations due to topotecan in both short-range interactions and long-range protein domain communications.
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Affiliation(s)
- Giordano Mancini
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Rome, Italy
| | - Ilda D'Annessa
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Rome, Italy
- Department of Biology and Centro di Bioinformatica e Biostatistica, University of Rome Tor Vergata, Rome, Italy
| | - Andrea Coletta
- Department of Biology and Centro di Bioinformatica e Biostatistica, University of Rome Tor Vergata, Rome, Italy
| | - Nico Sanna
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Rome, Italy
| | - Giovanni Chillemi
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Rome, Italy
- * E-mail: (GC); (AD)
| | - Alessandro Desideri
- Department of Biology and Centro di Bioinformatica e Biostatistica, University of Rome Tor Vergata, Rome, Italy
- * E-mail: (GC); (AD)
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Fiorani P, Tesauro C, Mancini G, Chillemi G, D'Annessa I, Graziani G, Tentori L, Muzi A, Desideri A. Evidence of the crucial role of the linker domain on the catalytic activity of human topoisomerase I by experimental and simulative characterization of the Lys681Ala mutant. Nucleic Acids Res 2009; 37:6849-58. [PMID: 19767617 PMCID: PMC2777420 DOI: 10.1093/nar/gkp669] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The functional and structural-dynamical properties of the Lys681Ala mutation in the human topoisomerase IB linker domain have been investigated by catalytic assays and molecular dynamics simulation. The mutant is characterized by a comparable cleavage and a strongly reduced religation rate when compared to the wild type protein. The mutant also displays perturbed linker dynamics, as shown by analysis of the principal components of the motion, and a reduced electrostatic interaction with DNA. Inspection of the inter atomic distances in proximity of the active site shows that in the mutant the distance between the amino group of Lys532 side chain and the 5′ OH of the scissile phosphate is longer than the wild type enzyme, providing an atomic explanation for the reduced religation rate of the mutant. Taken together these results indicate the existence of a long range communication between the linker domain and the active site region and points out the crucial role of the linker in the modulation of the catalytic activity.
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Affiliation(s)
- Paola Fiorani
- Department of Biology, University of Rome Tor Vergata, CNR National Research Council, INFM National Institute for the Physics of Matter, Rome 00133, Italy
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Castelli S, Campagna A, Vassallo O, Tesauro C, Fiorani P, Tagliatesta P, Oteri F, Falconi M, Majumder HK, Desideri A. Conjugated eicosapentaenoic acid inhibits human topoisomerase IB with a mechanism different from camptothecin. Arch Biochem Biophys 2009; 486:103-10. [PMID: 19397888 DOI: 10.1016/j.abb.2009.04.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2009] [Revised: 04/17/2009] [Accepted: 04/19/2009] [Indexed: 01/08/2023]
Abstract
Conjugated eicosapentaenoic acid (cEPA) has been found to have antitumor effects which has been ascribed to their ability to inhibit DNA topoisomerases and DNA polymerases. We here show that cEPA inhibits the catalytic activity of human topoisomerase I, but unlike camptothecin it does not stabilize the cleavable complex, indicating a different mechanism of action. cEPA inhibits topoisomerase by impeding the catalytic cleavage of the DNA substrate as demonstrated using specific oligonucleotide substrates, and prevents the stabilization of the cleavable complex by camptothecin. Preincubation of the inhibitor with the enzyme is required to obtain complete inhibition. Molecular docking simulations indicate that the preferred cEPA binding site is proximal to the active site with the carboxylic group strongly interacting with the positively charged K443 and K587. Taken together the results indicate that cEPA inhibitor does not prevent DNA binding but inhibits DNA cleavage, binding in a region close to the topoisomerase active site.
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Affiliation(s)
- Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, Italy
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Szklarczyk O, Staroń K, Cieplak M. Native state dynamics and mechanical properties of human topoisomerase I within a structure-based coarse-grained model. Proteins 2009; 77:420-31. [DOI: 10.1002/prot.22450] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
DNA topoisomerases are a diverse set of essential enzymes responsible for maintaining chromosomes in an appropriate topological state. Although they vary considerably in structure and mechanism, the partnership between topoisomerases and DNA has engendered commonalities in how these enzymes engage nucleic acid substrates and control DNA strand manipulations. All topoisomerases can harness the free energy stored in supercoiled DNA to drive their reactions; some further use the energy of ATP to alter the topology of DNA away from an enzyme-free equilibrium ground state. In the cell, topoisomerases regulate DNA supercoiling and unlink tangled nucleic acid strands to actively maintain chromosomes in a topological state commensurate with particular replicative and transcriptional needs. To carry out these reactions, topoisomerases rely on dynamic macromolecular contacts that alternate between associated and dissociated states throughout the catalytic cycle. In this review, we describe how structural and biochemical studies have furthered our understanding of DNA topoisomerases, with an emphasis on how these complex molecular machines use interfacial interactions to harness and constrain the energy required to manage DNA topology.
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Chillemi G, D'Annessa I, Fiorani P, Losasso C, Benedetti P, Desideri A. Thr729 in human topoisomerase I modulates anti-cancer drug resistance by altering protein domain communications as suggested by molecular dynamics simulations. Nucleic Acids Res 2008; 36:5645-51. [PMID: 18765473 PMCID: PMC2553568 DOI: 10.1093/nar/gkn558] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
The role of Thr729 in modulating the enzymatic function of human topoisomerase I has been characterized by molecular dynamics (MD) simulation. In detail, the structural–dynamical behaviour of the Thr729Lys and the Thr729Pro mutants have been characterized because of their in vivo and in vitro functional properties evidenced in the accompanying paper. Both mutants can bind to the DNA substrate and are enzymatically active, but while Thr729Lys is resistant even at high concentration of the camptothecin (CPT) anti-cancer drug, Thr729Pro shows only a mild reduction in drug sensitivity and in DNA binding. MD simulations show that the Thr729Lys mutation provokes a structural perturbation of the CPT-binding pocket. On the other hand, the Thr729Pro mutant maintains the wild-type structural scaffold, only increasing its rigidity. The simulations also show the complete abolishment, in the Thr729Lys mutant, of the protein communications between the C-terminal domain (where the active Tyr723 is located) and the linker domain, that plays an essential role in the control of the DNA rotation, thus explaining the distributive mode of action displayed by this mutant.
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Affiliation(s)
- Giovanni Chillemi
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy.
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Chillemi G, Bruselles A, Fiorani P, Bueno S, Desideri A. The open state of human topoisomerase I as probed by molecular dynamics simulation. Nucleic Acids Res 2007; 35:3032-8. [PMID: 17439970 PMCID: PMC1888835 DOI: 10.1093/nar/gkm199] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The open state of human topoisomerase I has been probed by molecular dynamics simulation, starting from the coordinates of the closed structure of the protein complexed with DNA, after elimination of the 22-bp DNA duplex oligonucleotide. A repulsion force between the two lips of the protein has been introduced for a short time to induce destabilization of the local minimum, after which an unperturbed simulation has been carried out for 10 ns. The simulation shows that the protein undergoes a large conformational change due to rearrangements in the orientation of the protein domains, which however move as a coherent unit, fully maintaining their secondary and tertiary structures. Despite movements between the domains as large as 80-90 A, the catalytic pentad remains preassembled, the largest deviation of the active site backbone atoms from the starting crystallographic structure being only 1.7 A. Electrostatic calculation of the open protein structure shows that the protein displays a vast positive region with the active site residues located nearly at its center, in a conformation perfectly suited to interact with the negatively charged supercoiled DNA substrate.
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Affiliation(s)
- Giovanni Chillemi
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy and INFM National Institute for the Physics of Matter, interdisciplinary Centre of Bioinformatics and Biostatistics and Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Alessandro Bruselles
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy and INFM National Institute for the Physics of Matter, interdisciplinary Centre of Bioinformatics and Biostatistics and Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Paola Fiorani
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy and INFM National Institute for the Physics of Matter, interdisciplinary Centre of Bioinformatics and Biostatistics and Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Susana Bueno
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy and INFM National Institute for the Physics of Matter, interdisciplinary Centre of Bioinformatics and Biostatistics and Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Alessandro Desideri
- CASPUR Inter-University Consortium for the Application of Super-Computing for Universities and Research, Via dei Tizii 6, Rome 00185, Italy and INFM National Institute for the Physics of Matter, interdisciplinary Centre of Bioinformatics and Biostatistics and Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
- *To whom correspondence should be addressed. +39 0672594376+39 062022798
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Losasso C, Cretaio E, Palle K, Pattarello L, Bjornsti MA, Benedetti P. Alterations in linker flexibility suppress DNA topoisomerase I mutant-induced cell lethality. J Biol Chem 2007; 282:9855-9864. [PMID: 17276985 DOI: 10.1074/jbc.m608200200] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Eukaryotic DNA topoisomerase I (Top1p) catalyzes changes in DNA topology via the formation of a covalent enzyme-DNA intermediate, which is reversibly stabilized by the anticancer agent camptothecin (CPT). Crystallographic studies of the 70-kDa C terminus of human Top1p bound to duplex DNA describe a monomeric protein clamp circumscribing the DNA helix. The structures, which lack the N-terminal domain, comprise the conserved clamp, an extended linker domain, and the conserved C-terminal active site Tyr domain. CPT bound to the covalent Top1p-DNA complex limits linker flexibility, allowing structural determination of this domain. We previously reported that mutation of Ala(653) to Pro in the linker increases the rate of enzyme-catalyzed DNA religation, thereby rendering Top1A653Pp resistant to CPT (Fiorani, P., Bruselles, A., Falconi, M., Chillemi, G., Desideri, A., and Benedetti P. (2003) J. Biol. Chem. 278, 43268-43275). Molecular dynamics studies suggested mutation-induced increases in linker flexibility alter Top1p catalyzed DNA religation. To address the functional consequences of linker flexibility on enzyme catalysis and drug sensitivity, we investigated the interactions of the A653P linker mutation with a self-poisoning T718A mutation within the active site of Top1p. The A653P mutation suppressed the lethal phenotype of Top1T718Ap in yeast, yet did not restore enzyme sensitivity to CPT. However, the specific activity of the double mutant was decreased in vivo and in vitro, consistent with a decrease in DNA binding. These findings support a model where changes in the flexibility or orientation of the linker alter the geometry of the active site and thereby the kinetics of DNA cleavage/religation catalyzed by Top1p.
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Affiliation(s)
- Carmen Losasso
- Department of Biology, University of Padua, Padua 35131, Italy
| | - Erica Cretaio
- Department of Biology, University of Padua, Padua 35131, Italy
| | - Komaraiah Palle
- Department of Molecular Pharmacology, St. Jude Children's Research Hospital, Memphis, Tennessee 38104
| | - Luca Pattarello
- Department of Biology, University of Padua, Padua 35131, Italy
| | - Mary-Ann Bjornsti
- Department of Molecular Pharmacology, St. Jude Children's Research Hospital, Memphis, Tennessee 38104
| | - Piero Benedetti
- Department of Biology, University of Padua, Padua 35131, Italy.
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Falconi M, Chillemi G, Di Marino D, D'Annessa I, Morozzo della Rocca B, Palmieri L, Desideri A. Structural dynamics of the mitochondrial ADP/ATP carrier revealed by molecular dynamics simulation studies. Proteins 2006; 65:681-91. [PMID: 16988954 DOI: 10.1002/prot.21102] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The mitochondrial adenosine diphosphate/adenosine triphosphate (ADP/ATP) carrier has been recently crystallized in complex with its specific inhibitor carboxyatractyloside (CATR). In the crystal structure, the six-transmembrane helix bundle that defines the nucleotide translocation pathway is closed on the matrix side due to sharp kinks in the odd-numbered helices. The closed conformation is further sealed by the loops protruding into the matrix that interact through an intricate network of charge-pairs. To gain insight into its structural dynamics we performed molecular dynamics (MD) simulation studies of the ADP/ATP carrier with and without its cocrystallized inhibitor. The two trajectories sampled a conformational space around two different configurations characterized by distinct salt-bridge networks with a significant shift from inter- to intrarepeat bonding on the matrix side in the absence of CATR. Analysis of the geometrical parameters defining the transmembrane helices showed that even-numbered helices can undergo a face rotation, whereas odd-numbered helices can undergo a change in the wobble angle with a conserved proline acting as molecular hinge. Our results provide new information on the dynamical properties of the ADP/ATP carrier and for the first time yield a detailed picture of a stable carrier conformation in absence of the inhibitor.
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Affiliation(s)
- M Falconi
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
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Fiorani P, Chillemi G, Losasso C, Castelli S, Desideri A. The different cleavage DNA sequence specificity explains the camptothecin resistance of the human topoisomerase I Glu418Lys mutant. Nucleic Acids Res 2006; 34:5093-100. [PMID: 16990249 PMCID: PMC1636438 DOI: 10.1093/nar/gkl670] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Yeast cells expressing the Glu418Lys human topoisomerase I mutant display a camptothecin resistance that slowly decreases as a function of time. Molecular characterization of the single steps of the catalytic cycle of the purified mutant indicates that it has a relaxation activity identical to the wild-type protein but a different DNA sequence specificity for the cleavage sites when compared to the wild-type enzyme, as assayed on several substrates. In particular the mutant has a low specificity for CPT sensitive cleavable sites. In fact, the mutant has, at variance of the wild-type enzyme, a reduced preference for cleavage sites having a thymine base in position −1 of the scissile strand. This preference, together with the strict requirement for a thymine base in position −1 for an efficient camptothecin binding, explains the temporary camptothecin resistance of the yeast cell expressing the mutant and points out the importance of the DNA sequence in the binding of the camptothecin drug.
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Affiliation(s)
- Paola Fiorani
- CNR National Research Council, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- INFM National Institute for the Physics of Matter, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- Department of Biology, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
| | - Giovanni Chillemi
- CASPUR Interuniversities Consortium for Supercomputing Applications, Via dei Tizii 6bRome 00185, Italy
| | - Carmen Losasso
- Department of Biology, University of PaduaVia U. Bassi 58/B, Padua 35131, Italy
| | - Silvia Castelli
- CNR National Research Council, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- INFM National Institute for the Physics of Matter, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- Department of Biology, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
| | - Alessandro Desideri
- CNR National Research Council, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- INFM National Institute for the Physics of Matter, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- Department of Biology, University of Rome Tor VergataVia Della Ricerca Scientifica, Rome 00133, Italy
- To whom correspondence should be addressed. Tel: +39 0672594376; Fax: +39 0672594326;
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Blagoev KB, Alexandrov BS, Goodwin EH, Bishop AR. Ultra-violet light induced changes in DNA dynamics may enhance TT-dimer recognition. DNA Repair (Amst) 2006; 5:863-7. [PMID: 16774850 DOI: 10.1016/j.dnarep.2006.04.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2006] [Revised: 04/11/2006] [Accepted: 04/13/2006] [Indexed: 11/29/2022]
Abstract
Short-wave ultra-violet light promotes the formation of DNA dimers between adjacent thymine bases, and if unrepaired these dimers may induce skin cancer. Living cells have a very robust repair system capable of repairing hundreds of lesions every day. Although many of the details of the dimer repair mechanism are known, it is still a mystery how the dimers are recognized. Because the dimers are hidden from repair proteins diffusing in the cell nucleus, it has been surmised that dimer recognition is indirect. In this paper, a new recognition signal is suggested by a theory of the dimer-induced large amplitude, prolonged oscillations in the motion of the two strands in double-stranded DNA molecules. These large amplitude oscillations of the two DNA strands, localized around the dimer will unveil the dimer allowing the repair proteins to bind to the dimer site. The temperature dependence of the recognition rate is correlated with the inter-strand fluctuations and must decrease with decreasing temperature according to the findings in this paper. Moreover the probability for finding a large opening is localized to the dimer neighbourhood and these large openings may play an important role in dimer-repair protein biochemistry.
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Affiliation(s)
- K B Blagoev
- Theoretical Division, Los Alamos National Laboratory, NM 87545, USA.
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Sanna N, Chillemi G, Grandi A, Castelli S, Desideri A, Barone V. New Hints on the pH-Driven Tautomeric Equilibria of the Topotecan Anticancer Drug in Aqueous Solutions from an Integrated Spectroscopic and Quantum-Mechanical Approach. J Am Chem Soc 2005; 127:15429-36. [PMID: 16262406 DOI: 10.1021/ja052637u] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The equilibria between the different forms of the topotecan anticancer drug have been studied at moderately acidic and physiological pH by an integrated computational tool rooted in the density functional theory and its time-dependent extension together with the polarizable continuum model. The results allow an unbiased selection between the different possible tautomeric forms and provide invaluable complements to experimental data. The ultraviolet-visible topotecan spectrum, recorded at moderately acidic pH, is accurately reproduced only by TD-DFT computations including solvent effects. Comparison of the experimental and calculated bands of the UV-vis spectrum at physiological pH indicates the presence of an equilibrium among different forms that is tuned by the microenvironment embedding the drug. The quantitative agreement between TD-DFT/PCM computations and experiments allows the identification of unequivocal spectroscopic signatures for different forms of topotecan.
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Affiliation(s)
- Nico Sanna
- CASPUR, Consortium for Supercomputing in Research, Via dei Tizii 6/b, 00185 Rome, Italy
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