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Mei C, Lei L, Tan LM, Xu XJ, He BM, Luo C, Yin JY, Li X, Zhang W, Zhou HH, Liu ZQ. The role of single strand break repair pathways in cellular responses to camptothecin induced DNA damage. Biomed Pharmacother 2020; 125:109875. [DOI: 10.1016/j.biopha.2020.109875] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/24/2019] [Accepted: 01/06/2020] [Indexed: 12/12/2022] Open
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2
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Crnković A, Vargas-Rodriguez O, Söll D. Plasticity and Constraints of tRNA Aminoacylation Define Directed Evolution of Aminoacyl-tRNA Synthetases. Int J Mol Sci 2019; 20:ijms20092294. [PMID: 31075874 PMCID: PMC6540133 DOI: 10.3390/ijms20092294] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 04/29/2019] [Accepted: 05/07/2019] [Indexed: 02/07/2023] Open
Abstract
Genetic incorporation of noncanonical amino acids (ncAAs) has become a powerful tool to enhance existing functions or introduce new ones into proteins through expanded chemistry. This technology relies on the process of nonsense suppression, which is made possible by directing aminoacyl-tRNA synthetases (aaRSs) to attach an ncAA onto a cognate suppressor tRNA. However, different mechanisms govern aaRS specificity toward its natural amino acid (AA) substrate and hinder the engineering of aaRSs for applications beyond the incorporation of a single l-α-AA. Directed evolution of aaRSs therefore faces two interlinked challenges: the removal of the affinity for cognate AA and improvement of ncAA acylation. Here we review aspects of AA recognition that directly influence the feasibility and success of aaRS engineering toward d- and β-AAs incorporation into proteins in vivo. Emerging directed evolution methods are described and evaluated on the basis of aaRS active site plasticity and its inherent constraints.
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Affiliation(s)
- Ana Crnković
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
| | - Oscar Vargas-Rodriguez
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
| | - Dieter Söll
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
- Department of Chemistry, Yale University, New Haven, CT 06520, USA.
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3
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Bai X, Talukder P, Daskalova SM, Roy B, Chen S, Li Z, Dedkova LM, Hecht SM. Enhanced Binding Affinity for an i-Motif DNA Substrate Exhibited by a Protein Containing Nucleobase Amino Acids. J Am Chem Soc 2017; 139:4611-4614. [PMID: 28263595 DOI: 10.1021/jacs.6b11825] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Several variants of a nucleic acid binding motif (RRM1) of putative transcription factor hnRNP LL containing nucleobase amino acids at specific positions have been prepared and used to study binding affinity for the BCL2 i-motif DNA. Molecular modeling suggested a number of amino acids in RRM1 likely to be involved in interaction with the i-motif DNA, and His24 and Arg26 were chosen for modification based on their potential ability to interact with G14 of the i-motif DNA. Four nucleobase amino acids were introduced into RRM1 at one or both of positions 24 and 26. The introduction of cytosine nucleobase 2 into position 24 of RRM1 increased the affinity of the modified protein for the i-motif DNA, consistent with the possible Watson-Crick interaction of 2 and G14. In comparison, the introduction of uracil nucleobase 3 had a minimal effect on DNA affinity. Two structurally simplified nucleobase analogues (1 and 4) lacking both the N-1 and the 2-oxo substituents were also introduced in lieu of His24. Again, the RRM1 analogue containing 1 exhibited enhanced affinity for the i-motif DNA, while the protein analogue containing 4 bound less tightly to the DNA substrate. Finally, the modified protein containing 1 in lieu of Arg26 also bound to the i-motif DNA more strongly than the wild-type protein, but a protein containing 1 both at positions 24 and 26 bound to the DNA less strongly than wild type. The results support the idea of using nucleobase amino acids as protein constituents for controlling and enhancing DNA-protein interaction. Finally, modification of the i-motif DNA at G14 diminished RRM1-DNA interaction, as well as the ability of nucleobase amino acid 1 to stabilize RRM1-DNA interaction.
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Affiliation(s)
- Xiaoguang Bai
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Poulami Talukder
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Sasha M Daskalova
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Basab Roy
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Shengxi Chen
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Zhongxian Li
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Larisa M Dedkova
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
| | - Sidney M Hecht
- Biodesign Center for BioEnergetics, and School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States
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4
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Qu N, Li F, Shao B, Shao J, Zhai G, Wang F, Zhu BZ. The Unexpected and Exceptionally Facile Chemical Modification of the Phenolic Hydroxyl Group of Tyrosine by Polyhalogenated Quinones under Physiological Conditions. Chem Res Toxicol 2016; 29:1699-1705. [DOI: 10.1021/acs.chemrestox.6b00217] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Na Qu
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences and University of the Chinese Academy of Sciences, the Chinese Academy of Sciences, 18 Shuangqin
Road, Haidian District, Beijing 100085, P. R. China
| | - Feng Li
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences and University of the Chinese Academy of Sciences, the Chinese Academy of Sciences, 18 Shuangqin
Road, Haidian District, Beijing 100085, P. R. China
| | - Bo Shao
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences and University of the Chinese Academy of Sciences, the Chinese Academy of Sciences, 18 Shuangqin
Road, Haidian District, Beijing 100085, P. R. China
| | - Jie Shao
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences and University of the Chinese Academy of Sciences, the Chinese Academy of Sciences, 18 Shuangqin
Road, Haidian District, Beijing 100085, P. R. China
| | - Guijin Zhai
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- Tianjin
Research Centre of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, P. R. China
| | - Fuyi Wang
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Ben-Zhan Zhu
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences and University of the Chinese Academy of Sciences, the Chinese Academy of Sciences, 18 Shuangqin
Road, Haidian District, Beijing 100085, P. R. China
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5
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Yakovleva L, Shuman S. Chemical mutagenesis of vaccinia DNA topoisomerase lysine 167 provides insights to the catalysis of DNA transesterification. Biochemistry 2013; 52:984-91. [PMID: 23317114 DOI: 10.1021/bi301643h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Vaccinia DNA topoisomerase IB (TopIB) relaxes supercoils by forming and resealing a covalent DNA-(3'-phosphotyrosyl(274))-enzyme intermediate. Conserved active site side chains promote the attack of Tyr274 on the scissile phosphodiester via transition state stabilization and general acid catalysis. Two essential side chains, Lys167 and Arg130, act in concert to protonate and expel the 5'-O leaving group. Here we gained new insights to catalysis through chemical mutagenesis of Lys167. Changing Lys167 to cysteine crippled the DNA cleavage and religation transesterification steps (k(cl) = 4.3 × 10(-4) s(-1); k(rel) = 9 × 10(-4) s(-1)). The transesterification activities of the K167C enzyme were revived by in vitro alkylation with 2-bromoethylamine (k(cl) = 0.031 s(-1); k(rel) ≥ 0.4 s(-1)) and 3-bromopropylamine (k(cl) = 0.013 s(-1); k(rel) = 0.22 s(-1)), which convert the cysteines to γ-thialysine and γ-thiahomolysine, respectively. These chemically installed lysine analogues were more effective than a genetically programmed arginine 167 substitution characterized previously. The modest differences in the transesterification rates of the 2-bromoethylamine- and 3-bromopropylamine-treated enzymes highlight that TopIB is tolerant of a longer homolysine side chain for assembly of the active site and formation of the transition state.
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Affiliation(s)
- Lyudmila Yakovleva
- Molecular Biology Program, Sloan-Kettering Institute, New York, NY 10065, United States
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Chen S, Fahmi NE, Nangreave RC, Mehellou Y, Hecht SM. Synthesis of pdCpAs and transfer RNAs activated with thiothreonine and derivatives. Bioorg Med Chem 2012; 20:2679-89. [PMID: 22405920 PMCID: PMC3575115 DOI: 10.1016/j.bmc.2012.02.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 02/05/2012] [Accepted: 02/08/2012] [Indexed: 11/29/2022]
Abstract
N,S-diprotected L-thiothreonine and L-allo-thiothreonine derivatives were synthesized using a novel chemical strategy, and used for esterification of the dinucleotide pdCpA. The aminoacylated dinucleotides were then employed for the preparation of activated suppressor tRNA(CUA) transcripts. Thiothreonine and allo-thiothreonine were incorporated into a predetermined position of a catalytically competent dihydrofolate reductase (DHFR) analogue lacking cysteine, and the elaborated proteins were derivatized site-specifically at the thiothreonine residue with a fluorophore.
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Affiliation(s)
- Shengxi Chen
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Nour Eddine Fahmi
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Ryan C. Nangreave
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Youcef Mehellou
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Sidney M. Hecht
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
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7
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Salwiczek M, Nyakatura EK, Gerling UIM, Ye S, Koksch B. Fluorinated amino acids: compatibility with native protein structures and effects on protein-protein interactions. Chem Soc Rev 2011; 41:2135-71. [PMID: 22130572 DOI: 10.1039/c1cs15241f] [Citation(s) in RCA: 327] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fluorinated analogues of the canonical α-L-amino acids have gained widespread attention as building blocks that may endow peptides and proteins with advantageous biophysical, chemical and biological properties. This critical review covers the literature dealing with investigations of peptides and proteins containing fluorinated analogues of the canonical amino acids published over the course of the past decade including the late nineties. It focuses on side-chain fluorinated amino acids, the carbon backbone of which is identical to their natural analogues. Each class of amino acids--aliphatic, aromatic, charged and polar as well as proline--is presented in a separate section. General effects of fluorine on essential properties such as hydrophobicity, acidity/basicity and conformation of the specific side chains and the impact of these altered properties on stability, folding kinetics and activity of peptides and proteins are discussed (245 references).
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Affiliation(s)
- Mario Salwiczek
- Department of Biology, Chemistry, Pharmacy, Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
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Bugreev DV, Nevinskiĭ GA. [The structure and mechanism of the action of type-IB DNA topoisomerases]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010; 36:293-311. [PMID: 20644584 DOI: 10.1134/s1068162010030015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
DNA topoisomerases responsible for the superspiralization of genomic DNA participate in almost all vitally important cell processes, including replication, transcription, and recombination, and are essential for normal cell functioning. The present review summarizes published data for type-IB topoisomerases. The results concerning the thermodynamic, structural, and kinetic aspects of the functioning of topoisomerases and the peculiarities of the mechanisms of their action have been analyzed for the first time.
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Duca M, Chen S, Hecht SM. Aminoacylation of transfer RNAs with one and two amino acids. Methods 2008; 44:87-99. [PMID: 18241791 DOI: 10.1016/j.ymeth.2007.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Revised: 10/20/2007] [Accepted: 10/22/2007] [Indexed: 11/18/2022] Open
Abstract
The detailed synthesis of (bis)aminoacyl-pdCpAs and the corresponding singly and tandemly activated tRNAs is reported. The synthetic pathway leading to these compounds has been validated for simple amino acid residues as well as for amino acids bearing more complex side chains. Protection/deprotection strategies are described. For the bisaminoacylated tRNAs, both the synthesis of tRNAs bearing the same amino acid residue at the 2' and 3' positions and tRNAs bearing two different aminoacyl moieties are reported. Further, it is shown that the tandemly activated tRNAs are able to participate in protein synthesis.
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Affiliation(s)
- Maria Duca
- Departments of Chemistry and Biology, University of Virginia, Charlottesville, VA 22904, USA.
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10
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Yakovleva L, Chen S, Hecht SM, Shuman S. Chemical and traditional mutagenesis of vaccinia DNA topoisomerase provides insights to cleavage site recognition and transesterification chemistry. J Biol Chem 2008; 283:16093-103. [PMID: 18367446 DOI: 10.1074/jbc.m801595200] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Vaccinia DNA topoisomerase IB (TopIB) relaxes supercoils by forming and resealing a covalent DNA-(3'-phosphotyrosyl)-enzyme intermediate. Here we gained new insights to the TopIB mechanism through "chemical mutagenesis." Meta-substituted analogs of Tyr(274) were introduced by in vitro translation in the presence of a chemically misacylated tRNA. We report that a meta-OH reduced the rate of DNA cleavage 130-fold without affecting the rate of religation. By contrast, meta-OCH(3) and NO(2) groups elicited only a 6-fold decrement in cleavage rate. We propose that the meta-OH uniquely suppresses deprotonation of the para-OH nucleophile during the cleavage step. Assembly of the vaccinia TopIB active site is triggered by protein contacts with a specific DNA sequence 5'-C(+5)C(+4)C(+3)T(+2)T(+1)p downward arrowN (where downward arrow denotes the cleavage site). A signature alpha-helix of the poxvirus TopIB ((132)GKMKYLKENETVG(144)) engages the target site in the major groove and thereby recruits catalytic residue Arg(130) to the active site. The effects of 11 missense mutations at Tyr(136) highlight the importance of van der Waals interactions with the 3'-G(+4)pG(+3)p dinucleotide of the nonscissile strand for DNA cleavage and supercoil relaxation. Asn(140) and Thr(142) donate hydrogen bonds to the pro-(S(p))-oxygen of the G(+3)pA(+2) phosphodiester of the nonscissile strand. Lys(133) and Lys(135) interact with purine nucleobases in the major groove. Whereas none of these side chains is essential per se, an N140A/T142A double mutation reduces the rate of supercoil relaxation and DNA cleavage by 120- and 30-fold, respectively, and a K133A/K135A double mutation slows relaxation and cleavage by 120- and 35-fold, respectively. These results underscore functional redundancy at the TopIB-DNA interface.
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Affiliation(s)
- Lyudmila Yakovleva
- Molecular Biology Program, Sloan-Kettering Institute, New York, New York 10065, USA
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11
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Koster DA, Czerwinski F, Halby L, Crut A, Vekhoff P, Palle K, Arimondo PB, Dekker NH. Single-molecule observations of topotecan-mediated TopIB activity at a unique DNA sequence. Nucleic Acids Res 2008; 36:2301-10. [PMID: 18292117 PMCID: PMC2367732 DOI: 10.1093/nar/gkn035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The rate of DNA supercoil removal by human topoisomerase IB (TopIB) is slowed down by the presence of the camptothecin class of antitumor drugs. By preventing religation, these drugs also prolong the lifetime of the covalent TopIB–DNA complex. Here, we use magnetic tweezers to measure the rate of supercoil removal by drug-bound TopIB at a single DNA sequence in real time. This is accomplished by covalently linking camptothecins to a triple helix-forming oligonucleotide that binds at one location on the DNA molecule monitored. Surprisingly, we find that the DNA dynamics with the TopIB–drug interaction restricted to a single DNA sequence are indistinguishable from the dynamics observed when the TopIB–drug interaction takes place at multiple sites. Specifically, the DNA sequence does not affect the instantaneous supercoil removal rate or the degree to which camptothecins increase the lifetime of the covalent complex. Our data suggest that sequence-dependent dynamics need not to be taken into account in efforts to develop novel camptothecins.
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Affiliation(s)
- Daniel A. Koster
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Fabian Czerwinski
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Ludovic Halby
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Aurélien Crut
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Pierre Vekhoff
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Komaraiah Palle
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Paola B. Arimondo
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
| | - Nynke H. Dekker
- Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands, Department of Molecular Pharmacology, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA, BioQuant, Soft Matter and Biological Physics, University of Heidelberg, Im Neuenheimer Feld 267, 69120 Heidelberg, Germany, Laboratoire ‘Régulation et dynamique des génomes’ UMR 5153 CNRS-Muséum National d’Histoire Naturelle USM0503 and INSERM UR565; 43 rue Cuvier, 75231 Paris cedex 05, France
- * To whom correspondence should be addressed. +31 15 2783219+31 15 2781202
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Maloney DJ, Ghanem N, Zhou J, Hecht SM. Positional assignment of differentially substituted bisaminoacylated pdCpAs. Org Biomol Chem 2007; 5:3135-8. [PMID: 17878972 DOI: 10.1039/b708786a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The synthesis and NMR analysis of a 2'-O-alanyl, 3'-O-[1-(13)C]valyl-pdCpA derivative has permitted the definitive assignment of the positions of acylation of tandemly activated pdCpAs, and the bisaminoacylated transfer RNAs derived therefrom.
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Affiliation(s)
- David J Maloney
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
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