Abstract
The emergence of early life must have been marked by the appearance in the prebiotic era of complex molecular structures and systems, motivating the investigation of conditions that could not only facilitate appropriate chemical synthesis, but also provide the mechanisms of molecular selection and structural templating necessary to pilot the complexification toward specific molecular patterns. We recently proposed and demonstrated that these functions could be afforded by the spontaneous ordering of ultrashort nucleic acids oligomers into Liquid Crystal (LC) phases. In such supramolecular assemblies, duplex-forming oligomers are held in average end-to-end contact to form chemically discontinuous but physically continuous double helices. Using blunt ended duplexes, we found that LC formation could both provide molecular selection mechanisms and boost inter-oligomer ligation. This paper provides an essential extension to this notion by investigating the catalytic effects of LC ordering in duplexes with mutually interacting overhangs. Specifically, we studied the influence of LC ordering of 5’-hydroxy-3’-phosphate partially self-complementary DNA 14mers with 3’-CG sticky-ends, on the efficiency of non-enzymatic ligation reaction induced by water-soluble carbodiimide EDC as condensing agent. We investigated the ligation products in mixtures of DNA with poly-ethylene glycol (PEG) at three PEG concentrations at which the system phase separates creating DNA-rich droplets that organize into isotropic, nematic LC and columnar LC phases. We observe remarkable LC-enhanced chain lengthening, and we demonstrate that such lengthening effectively promotes and stabilizes LC domains, providing the kernel of a positive feedback cycle by which LC ordering promotes elongation, in turn stabilizing the LC ordering.
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References
Attwater J, Wochner A, Holliger P (2013) In-ice evolution of RNA polymerase ribozyme activity. Nat Chem 5:1011–1018. doi:10.1038/nchem.1781.In-ice
Baaske P, Weinert FM, Duhr S et al (2007) Extreme accumulation of nucleotides in simulated hydrothermal pore systems. Proc Natl Acad Sci U S A 104:9346–9351
Bellini T, Zanchetta G, Fraccia TP et al (2012) Liquid crystal self-assembly of random-sequence DNA oligomers. Proc Natl Acad Sci 109:1110–1115
Benner SA, Kim HJ, Carrigan MA (2012) Asphalt, water, and the prebiotic synthesis of ribose, Ribonucleosides, and RNA. Acc Chem Res 45:2025–2034
Budin I, Szostak JW (2010) Expanding roles for diverse physical phenomena during the origin of life. Annu Rev Biophys 39:245–263. doi:10.1146/annurev.biophys.050708.133753
Cafferty BJ, Gallego I, Chen MC et al (2013) Efficient self-assembly in water of long noncovalent polymers by nucleobase analogues. J Am Chem Soc 135:2447–2450
Costanzo G, Pino S, Ciciriello F, Di Mauro E (2009) Generation of long RNA chains in water. J Biol Chem 284:33206–33216. doi:10.1074/jbc.M109.041905
Davis JT, Spada GP (2007) Supramolecular architectures generated by self-assembly of guanosine derivatives. Chem Soc Rev 36:296–313. doi:10.1039/b600282j
De Duve C (2005) Singularities - landmarks on the pathways of life. Cambridge University Press, Cambridge
De Michele C, Bellini T, Sciortino F (2012) Self-assembly of bifunctional patchy particles with anisotropic shape into polymers chains: Theory, simulations, and experiments. Macromolecules 45:1090–1106
Drsata T, Pérez A, Orozco M et al (2013) Structure, stiffness and substates of the dickerson-drew dodecamer. J Chem Theory Comput 9:707–721
Ertem G (2004) Montmorillonite, oligonucleotides, RNA and origin of life. Orig Life Evol Biosph 34:549–570
Flory J (1936) Molecular size distribution in linear condensation polymers. J Am Chem Soc 1:1877–1885
Fraccia TP, Smith GP, Zanchetta G, et al. (2015) Abiotic ligation of DNA oligomers templated by their liquid crystal ordering. Nat Commun 1–7. 10.1038/ncomms7424
Gilbert W (1986) The RNA world. Nature 319:618. doi:10.1038/319618a0
Horowitz ED, Engelhart AE, Chen MC et al (2010) Intercalation as a means to suppress cyclization and promote polymerization of base-pairing oligonucleotides in a prebiotic world. Proc Natl Acad Sci U S A 107:5288–5293. doi:10.1073/pnas.0914172107
Huang W, Ferris JP (2006) One-step, regioselective synthesis of up to 50-mers of RNA oligomers by montmorillonite catalysis. J Am Chem Soc 128:8914–8919
Jia TZ, Hentrich C, Szostak JW (2014) Rapid RNA exchange in aqueous Two-phase system and coacervate droplets. Orig Life Evol Biosph 44:1–12. doi:10.1007/s11084-014-9355-8
Joyce GF (2002) The antiquity of RNA-based evolution. Nature 418:214–221
Kuriabova T, Betterton MD, Glaser MA (2010) Linear aggregation and liquid-crystalline order: comparison of Monte Carlo simulation and analytic theory. J Mater Chem 20:10366–10383. doi:10.1039/c0jm02355h
Kuruvilla E, Schuster GB, Hud NV (2013) Enhanced nonenzymatic ligation of Homopurine Miniduplexes: support for greater base stacking in a Pre-RNA world. ChemBioChem 14:45–48. doi:10.1002/cbic.201200601
Lydon JE (2003) The DNA double helix—the untold story. Liq Cryst Today 12:1–9. doi:10.1080/14645180310001603962
Maffeo C, Luan B, Aksimentiev A (2012) End-to-end attraction of duplex DNA. Nucleic Acids Res 40:3812–3821
Mamajanov I, Macdonald PJ, Ying J et al (2014) Ester formation and hydrolysis during Wet − Dry cycles : generation of Far-from-equilibrium polymers in a model prebiotic reaction. Macromolecules 47:1334–1343
Maniatis T, Jeffrey A, Van deSande H (1975) Chain length determination of small double- and single-stranded DNA molecules by polyacrylamide gel electrophoresis. Biochemistry 14:3787–3794. doi:10.1021/bi00688a010
Mast CB, Braun D (2010) Thermal trap for DNA replication. Phys Rev Lett 104:188102–188104. doi:10.1103/PhysRevLett.104.188102
Mast CB, Schink S, Gerland U, Braun D (2013) Escalation of polymerization in a thermal gradient. Proc Natl Acad Sci U S A 110:8030–5. doi:10.1073/pnas.1303222110
Mezzina E, Mariani P, Itri R et al (2001) The self-assembly of a lipophilic guanosine nucleoside into polymeric columnar aggregates: the nucleoside strucutre contains sufficient information to drive the process towards a strikingly regular polymer. Chemistry 7:388–395
Monod J (1971) Chance and necessity. Knopf, New York
Morasch M, Mast CB, Langer JK et al (2014) Dry polymerization of 3’,5’-cyclic GMP to long strands of RNA. ChemBioChem 15:879–83. doi:10.1002/cbic.201300773
Mungi CV, Rajamani S (2015) Characterization of RNA-like oligomers from lipid-assisted nonenzymatic synthesis: implications for origin of informational molecules on early earth. Life (Basel, Switzerland) 5:65–84. doi:10.3390/life5010065
Nakata M, Zanchetta G, Chapman BD et al (2007) End-to-end stacking and liquid crystal condensation of 6 to 20 base pair DNA duplexes. Science 318:1276–1279. doi:10.1126/science.1143826
Pross A (2008) How can a chemical system act purposefully? bridging between life and non-life. J Phys Org Chem 21:724–730. doi:10.1002/poc.1382
Rajamani S, Vlassov A, Benner S et al (2008) Lipid-assisted synthesis of RNA-like polymers from mononucleotides. Orig Life Evol Biosph 38:57–74. doi:10.1007/s11084-007-9113-2
Shabarova ZA, Dolinnaya NG, Drutsa VL et al (1981) DNA like duplexes with repetitions III. Efficient template-guided chemical polymerization of d (TGGCCAAGCTp). Nucleic Acids Res 9:5747–5761
Taran O, Thoennessen O, Achilles K, von Kiedrowski G (2010) Synthesis of information-carrying polymers of mixed sequences from double stranded short deoxynucleotides. J Syst Chem 1:9
Tombolato F, Ferrarini A (2005) From the double-stranded helix to the chiral nematic phase of B-DNA: a molecular model. J Chem Phys 122:054908
Vicens Q, Cech TR (2009) A natural ribozyme with 3’,5’ RNA ligase activity. Nat Chem Biol 5:97–9. doi:10.1038/nchembio.136
Zanchetta G, Bellini T, Nakata M, Clark NA (2008a) Physical polymerization and liquid crystallization of RNA oligomers. J Am Chem Soc 130:12864–12865
Zanchetta G, Nakata M, Buscaglia M et al (2008b) Liquid crystal ordering of DNA and RNA oligomers with partially overlapping sequences. J Phys Condens Matter 20:494214–494219. doi:10.1088/0953-8984/20/49/494214
Zanchetta G, Nakata M, Buscaglia M et al (2008c) Phase separation and liquid crystallization of complementary sequences in mixtures of nanoDNA oligomers. Proc Natl Acad Sci U S A 105:1111–1117
Zanchetta G, Giavazzi F, Nakata M et al (2010) Right-handed double-helix ultrashort DNA yields chiral nematic phases with both right- and left-handed director twist. Proc Natl Acad Sci U S A 107:17497–17502. doi:10.1073/pnas.1011199107
Zielinski WS, Orgel LE (1987) Oligoanminonucleoside phosphoramidates. Oligomerization of dimers of 3’-amino-3’-deoxynucleotides (GC and CG) in aqueous solution. Nucleic Acids Res 15:1699
Acknowledgments
This work was supported by the Grant PRIN Program of the Italian MIUR Ministry and by NSF MRSEC Grants 0820579 and 1420736, and NSF Biomolecular Materials Grant 1207606. We are indebted to Rosanna Asselta and Giorgio Dieci for the useful suggestions and stimulating discussions.
Author Contributions
T.B., N.A.C., G.Z., T.P.F. conceived the experiment; T.P.F., analyzed the PEG/EDC/DNA phase diagrams; T.P.F. performed the ligation experiments; T.P.F., V.R. performed the gel runs; T.B., T.P.F., G.Z., V.R. analyzed the gel profiles; T.B., N.A.C., T.P.F. wrote the paper.
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The authors declare no competing financial interests.
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Fraccia, T.P., Zanchetta, G., Rimoldi, V. et al. Evidence of Liquid Crystal–Assisted Abiotic Ligation of Nucleic Acids. Orig Life Evol Biosph 45, 51–68 (2015). https://doi.org/10.1007/s11084-015-9438-1
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Keywords
- Non-enzymatic ligation
- Liquid crystals
- DNA self-assembly
- Aqueous two-phase systems
- Compartmentalization
- Origin of life