1
|
Pérez‐Romero A, Domínguez‐Martín A, Galli S, Santamaría‐Díaz N, Palacios O, Dobado JA, Nyman M, Galindo MA. Single‐Stranded DNA as Supramolecular Template for One‐Dimensional Palladium(II) Arrays. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Antonio Pérez‐Romero
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Alicia Domínguez‐Martín
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Simona Galli
- 2 Dipartimento di Scienza e Alta Tecnologia Università dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Noelia Santamaría‐Díaz
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Oscar Palacios
- Departament de Química Facultat de Ciències Universitat Autònoma de Barcelona Campus Bellaterra s/n 08193 Cerdanyola del Vallès, Barcelona Spain
| | - José A. Dobado
- Grupo de Modelización y Diseño Molecular Departamento de Química Orgánica Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - May Nyman
- Department of Chemistry Oregon State University Corvallis OR 97331-4003 USA
| | - Miguel A. Galindo
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| |
Collapse
|
2
|
Pérez‐Romero A, Domínguez‐Martín A, Galli S, Santamaría‐Díaz N, Palacios O, Dobado JA, Nyman M, Galindo MA. Single‐Stranded DNA as Supramolecular Template for One‐Dimensional Palladium(II) Arrays. Angew Chem Int Ed Engl 2021; 60:10089-10094. [DOI: 10.1002/anie.202015554] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 01/15/2021] [Indexed: 12/27/2022]
Affiliation(s)
- Antonio Pérez‐Romero
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Alicia Domínguez‐Martín
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Simona Galli
- 2 Dipartimento di Scienza e Alta Tecnologia Università dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Noelia Santamaría‐Díaz
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - Oscar Palacios
- Departament de Química Facultat de Ciències Universitat Autònoma de Barcelona Campus Bellaterra s/n 08193 Cerdanyola del Vallès, Barcelona Spain
| | - José A. Dobado
- Grupo de Modelización y Diseño Molecular Departamento de Química Orgánica Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| | - May Nyman
- Department of Chemistry Oregon State University Corvallis OR 97331-4003 USA
| | - Miguel A. Galindo
- Departamento de Química Inorgánica. Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente Universidad de Granada Avda Fuentenueva s/n 18071 Granada Spain
| |
Collapse
|
3
|
Potempa M, Nalivaika E, Ragland D, Lee SK, Schiffer CA, Swanstrom R. A Direct Interaction with RNA Dramatically Enhances the Catalytic Activity of the HIV-1 Protease In Vitro. J Mol Biol 2015; 427:2360-78. [PMID: 25986307 DOI: 10.1016/j.jmb.2015.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 05/08/2015] [Accepted: 05/08/2015] [Indexed: 01/09/2023]
Abstract
Though the steps of human immunodeficiency virus type 1 (HIV-1) virion maturation are well documented, the mechanisms regulating the proteolysis of the Gag and Gag-Pro-Pol polyproteins by the HIV-1 protease (PR) remain obscure. One proposed mechanism argues that the maturation intermediate p15NC must interact with RNA for efficient cleavage by the PR. We investigated this phenomenon and found that processing of multiple substrates by the HIV-1 PR was enhanced in the presence of RNA. The acceleration of proteolysis occurred independently from the substrate's ability to interact with nucleic acid, indicating that a direct interaction between substrate and RNA is not necessary for enhancement. Gel-shift assays demonstrated the HIV-1 PR is capable of interacting with nucleic acids, suggesting that RNA accelerates processing reactions by interacting with the PR rather than the substrate. All HIV-1 PRs examined have this ability; however, the HIV-2 PR does not interact with RNA and does not exhibit enhanced catalytic activity in the presence of RNA. No specific sequence or structure was required in the RNA for a productive interaction with the HIV-1 PR, which appears to be principally, though not exclusively, driven by electrostatic forces. For a peptide substrate, RNA increased the kinetic efficiency of the HIV-1 PR by an order of magnitude, affecting both turnover rate (k(cat)) and substrate affinity (K(m)). These results suggest that an allosteric binding site exists on the HIV-1 PR and that HIV-1 PR activity during maturation could be regulated in part by the juxtaposition of the enzyme with virion-packaged RNA.
Collapse
Affiliation(s)
- Marc Potempa
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ellen Nalivaika
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Debra Ragland
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Sook-Kyung Lee
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Celia A Schiffer
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Ronald Swanstrom
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Center for AIDS Research, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| |
Collapse
|
4
|
Abstract
The physicochemical properties of small molecules as well as macromolecules are modulated by solution pH, and DNA is no exception. Special sequences of DNA can adopt unusual conformations e.g., triplex, i-motif and A-motif, depending on solution pH. The specific range of pH for these unusual structures is dictated by the pKa of protonation of the relevant nucleobase involved in the resultant non-canonical base pairing that is required to stabilise the structure. The biological significance of these pH-dependent structures is not yet clear. However, these non-B-DNA structures have been used to design different devices to direct chemical reactions, generate mechanical force, sense pH, etc. The performance of these devices can be monitored by a photonic signal. They are autonomous and their ‘waste free’ operation cycles makes them highly processive. Applications of these devices help to increase understanding of the structural polymorphism of the motifs themselves. The design of these devices has continuously evolved to improve their performance efficiency in different contexts. In some examples, these devices have been shown to perform inside complex living systems with similar efficiencies, to report on the chemical environment there. The robust performance of these devices opens up exciting possibilities for pH-sensitive DNA devices in the study of various pH-regulated biological events.
Collapse
Affiliation(s)
- Sonali Saha
- National Centre for Biological Sciences TIFR, GKVK, Bellary Road, Bangalore 560065 India
| | - Yamuna Krishnan*
- National Centre for Biological Sciences TIFR, GKVK, Bellary Road, Bangalore 560065 India
| |
Collapse
|
5
|
Chakraborty S, Sharma S, Maiti PK, Krishnan Y. The poly dA helix: a new structural motif for high performance DNA-based molecular switches. Nucleic Acids Res 2009; 37:2810-7. [PMID: 19279188 PMCID: PMC2685084 DOI: 10.1093/nar/gkp133] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We report a pH-dependent conformational transition in short, defined homopolymeric deoxyadenosines (dA15) from a single helical structure with stacked nucleobases at neutral pH to a double-helical, parallel-stranded duplex held together by AH+-H+A base pairs at acidic pH. Using native PAGE, 2D NMR, circular dichroism (CD) and fluorescence spectroscopy, we have characterized the two different pH dependent forms of dA15. The pH-triggered transition between the two defined helical forms of dA15 is characterized by CD and fluorescence. The kinetics of this conformational switch is found to occur on a millisecond time scale. This robust, highly reversible, pH-induced transition between the two well-defined structured states of dA15 represents a new molecular building block for the construction of quick-response, pH-switchable architectures in structural DNA nanotechnology.
Collapse
|
6
|
Zarudnaya MI. Possible mechanism of stabilization of one out of two poly(A) double helical forms. ACTA ACUST UNITED AC 2008. [DOI: 10.7124/bc.0007b1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M. I. Zarudnaya
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine
| |
Collapse
|
7
|
Crespo-Hernández CE, Cohen B, Hare PM, Kohler B. Ultrafast Excited-State Dynamics in Nucleic Acids. Chem Rev 2004; 104:1977-2019. [PMID: 15080719 DOI: 10.1021/cr0206770] [Citation(s) in RCA: 965] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
8
|
Hingerty BE, Broyde SB, Olson WK. The poly(rU) coil: a minimum-energy model that matches experimental observations. Biopolymers 1982; 21:1167-88. [PMID: 6178444 DOI: 10.1002/bip.360210612] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
9
|
Olsthoorn CS, Bostelaar LJ, De Rooij JF, Van Boom JH, Altona C. Circular dichroism study of stacking properties of oligodeoxyadenylates and polydeoxyadenylate. A three-state conformational model. EUROPEAN JOURNAL OF BIOCHEMISTRY 1981; 115:309-21. [PMID: 7238508 DOI: 10.1111/j.1432-1033.1981.tb05240.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The temperature dependence of the circular dichroism (CD) spectra of a series of deoxyadenylates (dA)n, n = 2, 3, 6, 9, 12, infinity, in aqueous solution was studied. The data were interpreted on the basis of a new conformational model for the stacked state suggested by our previous proton NMR studies on (dA)2 and (dA)3 [C. S. M. Olsthoorn, L. J. Bostelaar, J. H. van Boom & C. Altona (1980) Eur. J. biochem. 112, 95-110]. In this model the stacked regions of the single-stranded oligomers consist of residues taking up a geometry resembling that of the B-DNA genus of structures (all sugars S or C2'-endo) except those residues at the 3' end that do not 'feel' a following stacking interaction. The deoxyribose rings in the latter residues retain (or regain when melting out removes a stacking interaction somewhere along the chain) the conformational freedom (S in equilibrium N, N = C3'-endo) that these rings possess in the monomers 2'-deoxyadenosine 5'-methylphosphate or in 2'-deoxyadenosine 3',5'-bis(methylphosphate), as the case may be. It is shown that this model allows (a) construction of the CD spectra of (dA)n, n = 3, 6, 9, 12, from those of the dimer and the polymer; (b) the separation of the weak CD displayed by the regular S-S stacking mode and the far stronger CD exhibited by the 3'-end S-N stacking (the latter CD resembles that of the A-DNA genus of structures); (c) delineation of the thermodynamics of stacking. The melting temperature remains constant and independent of chain length (about 50 degrees C) whereas delta H degrees and delta S degrees show a slight increase in absolute values on increasing n from 2 to infinity owing to small cooperativity effects. Near 0 degrees C the dimer occurs for about 90% in the stacked form, the oligomers attain even higher conformational purities. It is suggested that premelting phenomena observed in the CD spectra of double-helical DNAs may also involve local transitions from the normal B-like ----S-S-s---- stacking mode to an A-like ----S-S-N---- stacking geometry.
Collapse
|
10
|
Dewey TG, Turner DH. Laser temperature-jump study of stacking in adenylic acid polymers. Biochemistry 1979; 18:5757-62. [PMID: 518868 DOI: 10.1021/bi00593a002] [Citation(s) in RCA: 84] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
11
|
Abstract
Poly(d[14C]A), p(dA)2, and [14C]adenosine-labeled DNA were irradiated at 254 nm with fluences up to 50 J/m2, and then following formic acid hydrolysis at 170 degrees C WERE SUBJECTED TO PAPER CHROMAtography using a butanol:water:acetic acid (80:30:12) solvent system. For poly(dA), up to 25% of the radioactivity appeared as fluorescent material located in the Rf 0.21-0.29 region. The hydrolysate of the purified photoproduct, p(dA)2, isolated from irradiated p(dA)2 by DEAE chromatography also had an Rf of 0.29 as well as an absorbance maximum at 310 nm. In all cases studied, however, the photoproduct yield in the Rf 0.29 region for native DNA was less than 2%. Denaturation of the DNA appeared to enhance the yield slightly, although no pronounced peak in this region of the chromatogram was discerned. Mechanistic studies indicate that the yield of the adenine photoproduct in poly(dA) is favored by base stacking, has a singlet excimer as a precursor, and is quenched by hydrogen bonding to a pyrimidine. It is concluded that the yield of the adenine photoproduct in both native and denatured DNA is considerably less than in poly (dA) and in all probability does not represent a biologically significant product.
Collapse
|
12
|
Howard FB, Frazier J, Miles HT. Poly(8-bromoadenylic acid): synthesis and characterization of an all-syn polynucleotide. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)41490-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
13
|
REMIN M, EKIEL I, SHUGAR D. Proton-Magnetic-Resonance Study of the Solution Conformation of the alpha and beta Anomers of 5-Ethyl-2'-deoxyuridine. ACTA ACUST UNITED AC 1975. [DOI: 10.1111/j.1432-1033.1975.tb04058.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
14
|
Rattle HW. Nuclear magnetic resonance in the study of biopolymers. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1974; 28:1-40. [PMID: 4617245 DOI: 10.1016/0079-6107(74)90015-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|