1
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Dev D, Wagner N, Pramanik B, Sharma B, Maity I, Cohen-Luria R, Peacock-Lopez E, Ashkenasy G. A Peptide-Based Oscillator. J Am Chem Soc 2023; 145:26279-26286. [PMID: 37984498 DOI: 10.1021/jacs.3c09377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Living organisms are replete with rhythmic and oscillatory behavior at all levels, to the extent that oscillations have been termed as a defining attribute of life. Recent studies of synthetic oscillators that mimic such functions have shown decayed cycles in batch-mode reactions or sustained oscillatory kinetics under flow conditions. Considering the hypothesized functionality of peptides in early chemical evolution and their central role in current bio-nanotechnology, we now reveal a peptide-based oscillator. Oscillatory behavior was achieved by coupling coiled-coil-based replication processes as positive feedback to controlled initiation and inhibition pathways in a continuously stirred tank reactor (CSTR). Our results stress that assembly into the supramolecular structure and specific interactions with the replication substrates are crucial for oscillations. The replication-inhibition processes were first studied in batch mode, which produced a single damped cycle. Thereafter, combined experimental and theoretical characterization of the replication process in a CSTR under different flow and environmental (pH, redox) conditions demonstrated reasonably sustained oscillations. We propose that studies in this direction might pave the way to the design of robust oscillation networks that mimic the autonomous behavior of proteins in cells (e.g., in the cyanobacterial circadian clock) and hence hint at feasible pathways that accelerated the transition from simple peptides to extant enzymes.
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Affiliation(s)
- Dharm Dev
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nathaniel Wagner
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Bapan Pramanik
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Bhawna Sharma
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Indrajit Maity
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
- Centre for Nano and Material Sciences, Jain Global Campus, Bangalore, Karnataka 560070, India
| | - Rivka Cohen-Luria
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Enrique Peacock-Lopez
- Department of Chemistry, Williams College, Williamstown, Massachusetts 02167, United States
| | - Gonen Ashkenasy
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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2
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Boigenzahn H, Yin J. Glycine to Oligoglycine via Sequential Trimetaphosphate Activation Steps in Drying Environments. ORIGINS LIFE EVOL B 2022; 52:249-261. [DOI: 10.1007/s11084-022-09634-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/03/2022] [Indexed: 12/14/2022]
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3
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Kahana A, Lancet D, Palmai Z. Micellar Composition Affects Lipid Accretion Kinetics in Molecular Dynamics Simulations: Support for Lipid Network Reproduction. LIFE (BASEL, SWITZERLAND) 2022; 12:life12070955. [PMID: 35888044 PMCID: PMC9325298 DOI: 10.3390/life12070955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/02/2022] [Accepted: 06/21/2022] [Indexed: 11/25/2022]
Abstract
Mixed lipid micelles were proposed to facilitate life through their documented growth dynamics and catalytic properties. Our previous research predicted that micellar self-reproduction involves catalyzed accretion of lipid molecules by the residing lipids, leading to compositional homeostasis. Here, we employ atomistic Molecular Dynamics simulations, beginning with 54 lipid monomers, tracking an entire course of micellar accretion. This was done to examine the self-assembly of variegated lipid clusters, allowing us to measure entry and exit rates of monomeric lipids into pre-micelles with different compositions and sizes. We observe considerable rate-modifications that depend on the assembly composition and scrutinize the underlying mechanisms as well as the energy contributions. Lastly, we describe the measured potential for compositional homeostasis in our simulated mixed micelles. This affirms the basis for micellar self-reproduction, with implications for the study of the origin of life.
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4
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Liu B, Wu J, Geerts M, Markovitch O, Pappas CG, Liu K, Otto S. Out-of-Equilibrium Self-Replication Allows Selection for Dynamic Kinetic Stability in a System of Competing Replicators. Angew Chem Int Ed Engl 2022; 61:e202117605. [PMID: 35179808 PMCID: PMC9314957 DOI: 10.1002/anie.202117605] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Indexed: 12/16/2022]
Abstract
Among the key characteristics of living systems are their ability to self‐replicate and the fact that they exist in an open system away from equilibrium. Herein, we show how the outcome of the competition between two self‐replicators, differing in size and building block composition, is different depending on whether the experiments are conducted in a closed vial or in an open and out‐of‐equilibrium replication–destruction regime. In the closed system, the slower replicator eventually prevails over the faster competitor. In a replication‐destruction regime, implemented through a flow system, the outcome of the competition is reversed and the faster replicator dominates. The interpretation of the experimental observations is supported by a mass‐action‐kinetics model. These results represent one of the few experimental manifestations of selection among competing self‐replicators based on dynamic kinetic stability and pave the way towards Darwinian evolution of abiotic systems.
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Affiliation(s)
- Bin Liu
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Juntian Wu
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Marc Geerts
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Omer Markovitch
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.,Origins Center, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, The Netherlands.,Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9747 AG, Groningen, The Netherlands
| | - Charalampos G Pappas
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Kai Liu
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Sijbren Otto
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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5
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Liu B, Wu J, Geerts M, Markovitch O, Pappas CG, Liu K, Otto S. Out‐of‐equilibrium self‐replication allows selection for dynamic kinetic stability in a system of competing replicators. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bin Liu
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Juntian Wu
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Marc Geerts
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Omer Markovitch
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Charalampos G. Pappas
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Kai Liu
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Sijbren Otto
- Stratingh Institute University of Groningen Centre for Systems Chemistry Nijenborgh 4 9747AG Groningen NETHERLANDS
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6
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Hatai J, Altay Y, Sood A, Kiani A, Eleveld MJ, Motiei L, Margulies D, Otto S. An Optical Probe for Real-Time Monitoring of Self-Replicator Emergence and Distinguishing between Replicators. J Am Chem Soc 2022; 144:3074-3082. [PMID: 35139307 PMCID: PMC8874894 DOI: 10.1021/jacs.1c11594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Self-replicating
systems play an important role in research on
the synthesis and origin of life. Monitoring of these systems has
mostly relied on techniques such as NMR or chromatography, which are
limited in throughput and demanding when monitoring replication in
real time. To circumvent these problems, we now developed a pattern-generating
fluorescent molecular probe (an ID-probe) capable of discriminating
replicators of different chemical composition and monitoring the process
of replicator formation in real time, giving distinct signatures for
starting materials, intermediates, and final products. Optical monitoring
of replicators dramatically reduces the analysis time and sample quantities
compared to most currently used methods and opens the door for future
high-throughput experimentation in protocell environments.
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Affiliation(s)
- Joydev Hatai
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Yigit Altay
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ankush Sood
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Armin Kiani
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marcel J Eleveld
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Leila Motiei
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - David Margulies
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Sijbren Otto
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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7
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Abstract
As the remit of chemistry expands beyond molecules to systems, new synthetic targets appear on the horizon. Among these, life represents perhaps the ultimate synthetic challenge. Building on an increasingly detailed understanding of the inner workings of living systems and advances in organic synthesis and supramolecular chemistry, the de novo synthesis of life (i.e., the construction of a new form of life based on completely synthetic components) is coming within reach. This Account presents our first steps in the journey toward this long-term goal. The synthesis of life requires the functional integration of different subsystems that harbor the different characteristics that are deemed essential to life. The most important of these are self-replication, metabolism, and compartmentalization. Integrating these features into a single system, maintaining this system out of equilibrium, and allowing it to undergo Darwinian evolution should ideally result in the emergence of life. Our journey toward de novo life started with the serendipitous discovery of a new mechanism of self-replication. We found that self-assembly in a mixture of interconverting oligomers is a general way of achieving self-replication, where the assembly process drives the synthesis of the very molecules that assemble. Mechanically induced breakage of the growing replicating assemblies resulted in their exponential growth, which is an important enabler for achieving Darwinian evolution. Through this mechanism, the self-replication of compounds containing peptides, nucleobases, and fully synthetic molecules was achieved. Several examples of evolutionary dynamics have been observed in these systems, including the spontaneous diversification of replicators allowing them to specialize on different food sets, history dependence of replicator composition, and the spontaneous emergence of parasitic behavior. Peptide-based replicator assemblies were found to organize their peptide units in space in a manner that, inadvertently, gives rise to microenvironments that are capable of catalysis of chemical reactions or binding-induced activation of cofactors. Among the reactions that can be catalyzed by the replicators are ones that produce the precursors from which these replicators grow, amounting to the first examples of the assimilation of a proto-metabolism. Operating these replicators in a chemically fueled out-of-equilibrium replication-destruction regime was found to promote an increase in their molecular complexity. Fueling counteracts the inherent tendency of replicators to evolve toward lower complexity (caused by the fact that smaller replicators tend to replicate faster). Among the remaining steps on the road to de novo life are now to assimilate compartmentalization and achieve open-ended evolution of the resulting system. Success in the synthesis of de novo life, once obtained, will have far-reaching implications for our understanding of what life is, for the search for extraterrestrial life, for how life may have originated on earth, and for every-day life by opening up new vistas in the form living technology and materials.
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Affiliation(s)
- Sijbren Otto
- Centre for Systems Chemistry, Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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8
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Dasgupta A, Babaahmadi R, Pahar S, Stefkova K, Gierlichs L, Yates BF, Ariafard A, Melen RL. Tris(pentafluorphenyl)boran‐katalysierte Erzeugung von Carbenium‐Ionen und autokatalytische Pyrazol‐Synthese – eine theoretische und experimentelle Studie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Rasool Babaahmadi
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Sanjukta Pahar
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Katarina Stefkova
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Lukas Gierlichs
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Brian F. Yates
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Alireza Ariafard
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Rebecca L. Melen
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
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9
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Dasgupta A, Babaahmadi R, Pahar S, Stefkova K, Gierlichs L, Yates BF, Ariafard A, Melen RL. Tris(pentafluorophenyl)borane-Catalyzed Carbenium Ion Generation and Autocatalytic Pyrazole Synthesis-A Computational and Experimental Study. Angew Chem Int Ed Engl 2021; 60:24395-24399. [PMID: 34590773 PMCID: PMC8596400 DOI: 10.1002/anie.202109744] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/16/2021] [Indexed: 12/11/2022]
Abstract
In recent years, metal-free organic synthesis using triarylboranes as catalysts has become a prevalent research area. Herein we report a comprehensive computational and experimental study for the highly selective synthesis of N-substituted pyrazoles through the generation of carbenium species from the reaction between aryl esters and vinyl diazoacetates in the presence of catalytic tris(pentafluorophenyl)borane [B(C6 F5 )3 ]. DFT studies were undertaken to illuminate the reaction mechanism revealing that the in situ generation of a carbenium species acts as an autocatalyst to prompt the regiospecific formation of N-substituted pyrazoles in good to excellent yields (up to 81 %).
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Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Rasool Babaahmadi
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Sanjukta Pahar
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Katarina Stefkova
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Lukas Gierlichs
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Brian F. Yates
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Alireza Ariafard
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Rebecca L. Melen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
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10
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Sevim İ. Design of Subreplicating Systems from an Existing Self-Replicating Diels-Alder Reaction System by Isosteric Replacement. J Org Chem 2021; 86:14964-14973. [PMID: 34633828 DOI: 10.1021/acs.joc.1c01695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The key feature of non-enzymatic self-replicating systems is the formation of catalytically active ternary complexes in which product templates direct precursors into spatial proximity to allow the formation of new covalent bonds. It is possible to create new replicating species by simply evaluating the ternary active complex of an existing replicating system and applying proper isosteric replacements. In this study, we have evaluated the formerly reported self-replicating Diels-Alder reaction having 61 and 33% selectivity for two diastereomeric replicators. An isosteric replacement on the spacer part connecting recognition and reactive sites of the maleimide component was applied by considering the symmetry of catalytically active ternary complexes, and it was shown that self-replication was conserved. Analysis of the new system showed 77 and 21% diastereoselectivity for the two new replicating species. Seeding experiments indicated autocatalytic activity of both replicators. In other words, both replicators compete with each other by catalyzing their own formation from the same reagent source. Another modification was applied by aiming selective blocking of the autocatalytic cycle of the competing diastereomer. The new system showed a diastereoselectivity of about 94% for the favored replicator. The kinetic data of both systems were analyzed by modeling with SimFit simulations.
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Affiliation(s)
- İlhan Sevim
- Lehrstuhl für Organische Chemie I, Ruhr-Universität Bochum, Universitätsstrasse 150, Bochum 44801, Germany
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11
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Achour S, Hosni Z, Darghouthi S, Syme C. Assisted dipeptide bond formation: glycine as a case study. Heliyon 2021; 7:e07276. [PMID: 34195408 PMCID: PMC8225972 DOI: 10.1016/j.heliyon.2021.e07276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/09/2021] [Accepted: 06/07/2021] [Indexed: 11/17/2022] Open
Abstract
Peptide bond formation is a crucial chemical process that dominates most biological mechanisms and is claimed to be a governing factor in the origin of life. Dipeptides made from glycine are studied computationally via Density Functional Theory (DFT) using two different basis sets. This reaction was investigated from both a thermodynamic and kinetic point of view. The effect of explicit assistance via the introduction of discrete solvent molecules was investigated. Water, methanol, and cyclohexane were all employed as solvent media in addition to gas to investigate their effects on the mechanism of peptide bond formation. This computational investigation revealed that methanol is slightly better than water to leverage peptide bond formation both kinetically and thermodynamically, while cyclohexane, a non-polar and non-protic solvent, is the least effective after gas as a medium of solvation. Energetic results in the gas environment are very close to those obtained in polar and protic solvents, suggesting that peptide bonds can be formed under interstellar conditions.
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Affiliation(s)
- Sofiene Achour
- University of Tunis El Manar, Research Unity of Modeling in Fundamental Sciences and Didactics, Team of Theoretical Chemistry and Reactivity, BP 254, El Manar 2, 2096, Tunisia
| | - Zied Hosni
- Sheffield Chemoinformatics Research Group, Information School, University of Sheffield, Regent Court, 211 Portobello, S1 4DP, Sheffield, UK
| | - Sarra Darghouthi
- University of Tunis El Manar, Research Unity of Modeling in Fundamental Sciences and Didactics, Team of Theoretical Chemistry and Reactivity, BP 254, El Manar 2, 2096, Tunisia
| | - Christopher Syme
- MRC-University of Glasgow Centre for Virus Research, Sir Michael Stoker Building, Garscube Campus, 464 Bearsden Road, Glasgow, G61 1QH, Scotland, UK
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12
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Pappas CG, Liu B, Marić I, Ottelé J, Kiani A, van der Klok ML, Onck PR, Otto S. Two Sides of the Same Coin: Emergence of Foldamers and Self-Replicators from Dynamic Combinatorial Libraries. J Am Chem Soc 2021; 143:7388-7393. [PMID: 33955219 PMCID: PMC8154527 DOI: 10.1021/jacs.1c00788] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The ability of molecules
and systems to make copies of themselves
and the ability of molecules to fold into stable, well-defined three-dimensional
conformations are of considerable importance in the formation and
persistence of life. The question of how, during the emergence of
life, oligomerization reactions become selective and channel these
reactions toward a small number of specific products remains largely
unanswered. Herein, we demonstrate a fully synthetic chemical system
where structurally complex foldamers and self-replicating assemblies
emerge spontaneously and with high selectivity from pools of oligomers
as a result of forming noncovalent interactions. Whether foldamers
or replicators form depends on remarkably small differences in building
block structures and composition and experimental conditions. We also
observed the dynamic transformation of a foldamer into a replicator.
These results show that the structural requirements/design criteria
for building blocks that lead to foldamers are similar to those that
lead to replicators. What determines whether folding or replication
takes place is not necessarily the type of noncovalent interaction,
but only whether they occur intra- or intermolecularly. This work
brings together, for the first time, the fields of replicator and
foldamer chemistry.
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Affiliation(s)
- Charalampos G Pappas
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Bin Liu
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ivana Marić
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Jim Ottelé
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Armin Kiani
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marcus L van der Klok
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Patrick R Onck
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sijbren Otto
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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13
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Ameta S, Matsubara YJ, Chakraborty N, Krishna S, Thutupalli S. Self-Reproduction and Darwinian Evolution in Autocatalytic Chemical Reaction Systems. Life (Basel) 2021; 11:308. [PMID: 33916135 PMCID: PMC8066523 DOI: 10.3390/life11040308] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/25/2021] [Accepted: 03/27/2021] [Indexed: 11/18/2022] Open
Abstract
Understanding the emergence of life from (primitive) abiotic components has arguably been one of the deepest and yet one of the most elusive scientific questions. Notwithstanding the lack of a clear definition for a living system, it is widely argued that heredity (involving self-reproduction) along with compartmentalization and metabolism are key features that contrast living systems from their non-living counterparts. A minimal living system may be viewed as "a self-sustaining chemical system capable of Darwinian evolution". It has been proposed that autocatalytic sets of chemical reactions (ACSs) could serve as a mechanism to establish chemical compositional identity, heritable self-reproduction, and evolution in a minimal chemical system. Following years of theoretical work, autocatalytic chemical systems have been constructed experimentally using a wide variety of substrates, and most studies, thus far, have focused on the demonstration of chemical self-reproduction under specific conditions. While several recent experimental studies have raised the possibility of carrying out some aspects of experimental evolution using autocatalytic reaction networks, there remain many open challenges. In this review, we start by evaluating theoretical studies of ACSs specifically with a view to establish the conditions required for such chemical systems to exhibit self-reproduction and Darwinian evolution. Then, we follow with an extensive overview of experimental ACS systems and use the theoretically established conditions to critically evaluate these empirical systems for their potential to exhibit Darwinian evolution. We identify various technical and conceptual challenges limiting experimental progress and, finally, conclude with some remarks about open questions.
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Affiliation(s)
- Sandeep Ameta
- Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
| | - Yoshiya J. Matsubara
- Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
| | - Nayan Chakraborty
- Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
| | - Sandeep Krishna
- Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
| | - Shashi Thutupalli
- Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
- International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560089, India
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14
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Sibilska-Kaminski IK, Yin J. Toward Molecular Cooperation by De Novo Peptides. ORIGINS LIFE EVOL B 2021; 51:71-82. [PMID: 33566281 PMCID: PMC8212187 DOI: 10.1007/s11084-021-09603-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 01/08/2021] [Indexed: 10/22/2022]
Abstract
Theoretical models of the chemical origins of life depend on self-replication or autocatalysis, processes that arise from molecular interactions, recruitment, and cooperation. Such models often lack details about the molecules and reactions involved, giving little guidance to those seeking to detect signs of interaction, recruitment, or cooperation in the laboratory. Here, we develop minimal mathematical models of reactions involving specific chemical entities: amino acids and their condensation reactions to form de novo peptides. Reactions between two amino acids form a dipeptide product, which enriches linearly in time; subsequent recruitment of such products to form longer peptides exhibit super-linear growth. Such recruitment can be reciprocated: a peptide contributes to and benefits from the formation of one or more other peptides; in this manner, peptides can cooperate and thereby exhibit autocatalytic or exponential growth. We have started to test these predictions by quantitative analysis of de novo peptide synthesis conducted by wet-dry cycling of a five-amino acid mixture over 21 days. Using high-performance liquid chromatography, we tracked abundance changes for >60 unique peptide species. Some species were highly transient, with the emergence of up to 17 new species and the extinction of nine species between samplings, while other species persisted across many cycles. Of the persisting species, most exhibited super-linear growth, a sign of recruitment anticipated by our models. This work shows how mathematical modeling and quantitative analysis of kinetic data can guide the search for prebiotic chemistries that have the potential to cooperate and replicate.
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Affiliation(s)
- Izabela K Sibilska-Kaminski
- Department of Chemical and Biological Engineering, Wisconsin Institute for Discovery , University of Wisconsin-Madison, 330 N. Orchard Street, Madison, WI, 53715, USA
| | - John Yin
- Department of Chemical and Biological Engineering, Wisconsin Institute for Discovery , University of Wisconsin-Madison, 330 N. Orchard Street, Madison, WI, 53715, USA.
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15
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Ellery A. How to Build a Biological Machine Using Engineering Materials and Methods. Biomimetics (Basel) 2020; 5:biomimetics5030035. [PMID: 32722540 PMCID: PMC7558640 DOI: 10.3390/biomimetics5030035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/14/2020] [Accepted: 07/19/2020] [Indexed: 01/09/2023] Open
Abstract
We present work in 3D printing electric motors from basic materials as the key to building a self-replicating machine to colonise the Moon. First, we explore the nature of the biological realm to ascertain its essence, particularly in relation to the origin of life when the inanimate became animate. We take an expansive view of this to ascertain parallels between the biological and the manufactured worlds. Life must have emerged from the available raw material on Earth and, similarly, a self-replicating machine must exploit and leverage the available resources on the Moon. We then examine these lessons to explore the construction of a self-replicating machine using a universal constructor. It is through the universal constructor that the actuator emerges as critical. We propose that 3D printing constitutes an analogue of the biological ribosome and that 3D printing may constitute a universal construction mechanism. Following a description of our progress in 3D printing motors, we suggest that this engineering effort can inform biology, that motors are a key facet of living organisms and illustrate the importance of motors in biology viewed from the perspective of engineering (in the Feynman spirit of “what I cannot create, I cannot understand”).
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Affiliation(s)
- Alex Ellery
- Space Exploration Engineering Group, Department of Mechanical & Aerospace Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada
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16
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From self-replication to replicator systems en route to de novo life. Nat Rev Chem 2020; 4:386-403. [PMID: 37127968 DOI: 10.1038/s41570-020-0196-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2020] [Indexed: 01/01/2023]
Abstract
The process by which chemistry can give rise to biology remains one of the biggest mysteries in contemporary science. The de novo synthesis and origin of life both require the functional integration of three key characteristics - replication, metabolism and compartmentalization - into a system that is maintained out of equilibrium and is capable of open-ended Darwinian evolution. This Review takes systems of self-replicating molecules as starting points and describes the steps necessary to integrate additional characteristics of life. We analyse how far experimental self-replicators have come in terms of Darwinian evolution. We also cover models of replicator communities that attempt to solve Eigen's paradox, whereby accurate replication needs complex machinery yet obtaining such complex self-replicators through evolution requires accurate replication. Successful models rely on a collective metabolism and a way of (transient) compartmentalization, suggesting that the invention and integration of these two characteristics is driven by evolution. Despite our growing knowledge, there remain numerous key challenges that may be addressed by a combined theoretical and experimental approach.
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17
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Robertson CC, Kosikova T, Philp D. Encoding Multiple Reactivity Modes within a Single Synthetic Replicator. J Am Chem Soc 2020; 142:11139-11152. [PMID: 32414236 DOI: 10.1021/jacs.0c03527] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Establishing programmable and self-sustaining replication networks in pools of chemical reagents is a key challenge in systems chemistry. Self-replicating templates are formed from two constituent components with complementary recognition and reactive sites via a slow bimolecular pathway and a fast template-directed pathway. Here, we re-engineer one of the components of a synthetic replicator to encode an additional recognition function, permitting the assembly of a binary complex between the components that mediates replicator formation through a template-independent pathway, which achieves maximum rate acceleration at early time points in the replication process. The complementarity between recognition sites creates a key conformational equilibrium between the catalytically inert product, formed via the template-independent pathway, and the catalytically active replicator that mediates the template-directed pathway. Consequently, the rapid formation of the catalytically inert isomer kick-starts replication through the template-directed pathway. Through kinetic analyses, we demonstrate that the presence of the two recognition-mediated reactivity modes results in enhanced template formation in comparison to that of systems capable of exploiting only a single recognition-mediated pathway. Finally, kinetic simulations reveal that the conformational equilibrium and both the relative and absolute efficiencies of the recognition-mediated pathways affect the extent to which self-replicating systems can benefit from this additional template-independent reactivity mode. These results allow us to formulate the rules that govern the coupling of replication processes to alternative recognition-mediated reactivity modes. The interplay between template-directed and template-independent pathways for replicator formation has significant relevance to ongoing efforts to design programmable and adaptable replicator networks.
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Affiliation(s)
- Craig C Robertson
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
| | - Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, United Kingdom.,Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Douglas Philp
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, United Kingdom.,Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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18
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Frenkel-Pinter M, Samanta M, Ashkenasy G, Leman LJ. Prebiotic Peptides: Molecular Hubs in the Origin of Life. Chem Rev 2020; 120:4707-4765. [PMID: 32101414 DOI: 10.1021/acs.chemrev.9b00664] [Citation(s) in RCA: 142] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The fundamental roles that peptides and proteins play in today's biology makes it almost indisputable that peptides were key players in the origin of life. Insofar as it is appropriate to extrapolate back from extant biology to the prebiotic world, one must acknowledge the critical importance that interconnected molecular networks, likely with peptides as key components, would have played in life's origin. In this review, we summarize chemical processes involving peptides that could have contributed to early chemical evolution, with an emphasis on molecular interactions between peptides and other classes of organic molecules. We first summarize mechanisms by which amino acids and similar building blocks could have been produced and elaborated into proto-peptides. Next, non-covalent interactions of peptides with other peptides as well as with nucleic acids, lipids, carbohydrates, metal ions, and aromatic molecules are discussed in relation to the possible roles of such interactions in chemical evolution of structure and function. Finally, we describe research involving structural alternatives to peptides and covalent adducts between amino acids/peptides and other classes of molecules. We propose that ample future breakthroughs in origin-of-life chemistry will stem from investigations of interconnected chemical systems in which synergistic interactions between different classes of molecules emerge.
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Affiliation(s)
- Moran Frenkel-Pinter
- NSF/NASA Center for Chemical Evolution, https://centerforchemicalevolution.com/.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Mousumi Samanta
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Gonen Ashkenasy
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Luke J Leman
- NSF/NASA Center for Chemical Evolution, https://centerforchemicalevolution.com/.,Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
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19
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Selection from a pool of self-assembling lipid replicators. Nat Commun 2020; 11:176. [PMID: 31924788 PMCID: PMC6954257 DOI: 10.1038/s41467-019-13903-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 12/06/2019] [Indexed: 11/22/2022] Open
Abstract
Replication and compartmentalization are fundamental to living systems and may have played important roles in life’s origins. Selection in compartmentalized autocatalytic systems might provide a way for evolution to occur and for life to arise from non-living systems. Herein we report selection in a system of self-reproducing lipids where a predominant species can emerge from a pool of competitors. The lipid replicators are metastable and their out-of-equilibrium population can be sustained by feeding the system with starting materials. Phase separation is crucial for selective surfactant formation as well as autocatalytic kinetics; indeed, no selection is observed when all reacting species are dissolved in the same phase. Selectivity is attributed to a kinetically controlled process where the rate of monomer formation determines which replicator building blocks are the fittest. This work reveals how kinetics of a phase-separated autocatalytic reaction may be used to control the population of out-of-equilibrium replicators in time. Selection in compartmentalized self-replicating systems might provide a way for life to arise from abiotic environments. Here, the authors explore selection in a system of transient autocatalytic lipids and find that autocatalytic kinetics and phase separation are the key selection factors.
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20
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Kosikova T, Philp D. Two Synthetic Replicators Compete To Process a Dynamic Reagent Pool. J Am Chem Soc 2019; 141:3059-3072. [PMID: 30668914 DOI: 10.1021/jacs.8b12077] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Complementary building blocks, comprising a set of four aromatic aldehydes and a set of four nucleophiles-three anilines and one hydroxylamine-combine through condensation reactions to afford a dynamic covalent library (DCL) consisting of the eight starting materials and 16 condensation products. One of the aldehydes and, consequently, all of the DCL members derived from this compound bear an amidopyridine recognition site. Exposure of this DCL to two maleimides, Mp and Mm, each equipped with a carboxylic acid recognition site, results in the formation of a series of products through irreversible 1,3-dipolar cycloaddition reactions with the four nitrones present in the DCL. However, only the two cycloadducts in the product pool that incorporate both recognition sites, Tp and Tm, are self-replicators that can harness the DCL as feedstock for their own formation, facilitating their own synthesis via autocatalytic and cross-catalytic pathways. The ability of these replicators to direct their own formation from the components present in the dynamic reagent pool in response to the input of instructions in the form of preformed replicators is demonstrated through a series of quantitative 19F{1H} NMR spectroscopy experiments. Simulations establish the critical relationships between the kinetic and thermodynamic parameters of the replicators, the initial reagent concentrations, and the presence or absence of the DCL and their influence on the competition between Tp and Tm. Thus, we establish the rules that govern the behavior of the competing replicators under conditions where their formation is coupled tightly to the processing of a DCL.
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Affiliation(s)
- Tamara Kosikova
- School of Chemistry and EaStCHEM , University of St Andrews , North Haugh , St Andrews , KY16 9ST Fife , United Kingdom
| | - Douglas Philp
- School of Chemistry and EaStCHEM , University of St Andrews , North Haugh , St Andrews , KY16 9ST Fife , United Kingdom
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21
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Rink WM, Thomas F. De Novo Designed α-Helical Coiled-Coil Peptides as Scaffolds for Chemical Reactions. Chemistry 2018; 25:1665-1677. [DOI: 10.1002/chem.201802849] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Indexed: 01/31/2023]
Affiliation(s)
- W. Mathis Rink
- Institute of Organic and Biomolecular Chemistry; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Franziska Thomas
- Institute of Organic and Biomolecular Chemistry; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
- Center for Biostructural Imaging of Neurodegeneration; Von-Siebold-Straße 3a 37075 Göttingen Germany
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22
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Robertson CC, Mackenzie HW, Kosikova T, Philp D. An Environmentally Responsive Reciprocal Replicating Network. J Am Chem Soc 2018; 140:6832-6841. [DOI: 10.1021/jacs.7b13576] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Craig C. Robertson
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh St Andrews, Fife KY16 9ST, United Kingdom
| | - Harold W. Mackenzie
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh St Andrews, Fife KY16 9ST, United Kingdom
| | - Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh St Andrews, Fife KY16 9ST, United Kingdom
| | - Douglas Philp
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh St Andrews, Fife KY16 9ST, United Kingdom
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23
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Kosikova T, Philp D. Exploring the emergence of complexity using synthetic replicators. Chem Soc Rev 2018; 46:7274-7305. [PMID: 29099123 DOI: 10.1039/c7cs00123a] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A significant number of synthetic systems capable of replicating themselves or entities that are complementary to themselves have appeared in the last 30 years. Building on an understanding of the operation of synthetic replicators in isolation, this field has progressed to examples where catalytic relationships between replicators within the same network and the extant reaction conditions play a role in driving phenomena at the level of the whole system. Systems chemistry has played a pivotal role in the attempts to understand the origin of biological complexity by exploiting the power of synthetic chemistry, in conjunction with the molecular recognition toolkit pioneered by the field of supramolecular chemistry, thereby permitting the bottom-up engineering of increasingly complex reaction networks from simple building blocks. This review describes the advances facilitated by the systems chemistry approach in relating the expression of complex and emergent behaviour in networks of replicators with the connectivity and catalytic relationships inherent within them. These systems, examined within well-stirred batch reactors, represent conceptual and practical frameworks that can then be translated to conditions that permit replicating systems to overcome the fundamental limits imposed on selection processes in networks operating under closed conditions. This shift away from traditional spatially homogeneous reactors towards dynamic and non-equilibrium conditions, such as those provided by reaction-diffusion reaction formats, constitutes a key change that mimics environments within cellular systems, which possess obvious compartmentalisation and inhomogeneity.
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Affiliation(s)
- Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UK.
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24
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Taran O, Chen C, Omosun TO, Hsieh MC, Rha A, Goodwin JT, Mehta AK, Grover MA, Lynn DG. Expanding the informational chemistries of life: peptide/RNA networks. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2016.0356. [PMID: 29133453 DOI: 10.1098/rsta.2016.0356] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
The RNA world hypothesis simplifies the complex biopolymer networks underlining the informational and metabolic needs of living systems to a single biopolymer scaffold. This simplification requires abiotic reaction cascades for the construction of RNA, and this chemistry remains the subject of active research. Here, we explore a complementary approach involving the design of dynamic peptide networks capable of amplifying encoded chemical information and setting the stage for mutualistic associations with RNA. Peptide conformational networks are known to be capable of evolution in disease states and of co-opting metal ions, aromatic heterocycles and lipids to extend their emergent behaviours. The coexistence and association of dynamic peptide and RNA networks appear to have driven the emergence of higher-order informational systems in biology that are not available to either scaffold independently, and such mutualistic interdependence poses critical questions regarding the search for life across our Solar System and beyond.This article is part of the themed issue 'Reconceptualizing the origins of life'.
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Affiliation(s)
- Olga Taran
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Chenrui Chen
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Tolulope O Omosun
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Ming-Chien Hsieh
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Allisandra Rha
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Jay T Goodwin
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Anil K Mehta
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Martha A Grover
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - David G Lynn
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
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25
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From Molecules to Life: Quantifying the Complexity of Chemical and Biological Systems in the Universe. J Mol Evol 2017; 86:1-10. [PMID: 29260254 PMCID: PMC5794832 DOI: 10.1007/s00239-017-9824-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 12/15/2017] [Indexed: 11/09/2022]
Abstract
Life is a complex phenomenon and much research has been devoted to both understanding its origins from prebiotic chemistry and discovering life beyond Earth. Yet, it has remained elusive how to quantify this complexity and how to compare chemical and biological units on one common scale. Here, a mathematical description of molecular complexity was applied allowing to quantitatively assess complexity of chemical structures. This in combination with the orthogonal measure of information complexity resulted in a two-dimensional complexity space ranging over the entire spectrum from molecules to organisms. Entities with a certain level of information complexity directly require a functionally complex mechanism for their production or replication and are hence indicative for life-like systems. In order to describe entities combining molecular and information complexity, the term biogenic unit was introduced. Exemplified biogenic unit complexities were calculated for ribozymes, protein enzymes, multimeric protein complexes, and even an entire virus particle. Complexities of prokaryotic and eukaryotic cells, as well as multicellular organisms, were estimated. Thereby distinct evolutionary stages in complexity space were identified. The here developed approach to compare the complexity of biogenic units allows for the first time to address the gradual characteristics of prebiotic and life-like systems without the need for a definition of life. This operational concept may guide our search for life in the Universe, and it may direct the investigations of prebiotic trajectories that lead towards the evolution of complexity at the origins of life.
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26
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Sadownik JW, Kosikova T, Philp D. Generating System-Level Responses from a Network of Simple Synthetic Replicators. J Am Chem Soc 2017; 139:17565-17573. [PMID: 29087701 DOI: 10.1021/jacs.7b09735] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The creation of reaction networks capable of exhibiting responses that are properties of entire systems represents a significant challenge for the chemical sciences. The system-level behavior of a reaction network is linked intrinsically to its topology and the functional connections between its nodes. A simple network of chemical reactions constructed from four reagents, in which each reagent reacts with exactly two others, can exhibit up-regulation of two products even when only a single chemical reaction is addressed catalytically. We implement a system with this topology using two maleimides and two nitrones of different sizes-either short or long and each bearing complementary recognition sites-that react pairwise through 1,3-dipolar cycloaddition reactions to create a network of four length-segregated replicating templates. Comprehensive 1H NMR spectroscopy experiments unravel the network topology, confirming that, in isolation, three out of four templates self-replicate, with the shortest template exhibiting the highest efficiency. The strongest template effects within the network are the mutually cross-catalytic relationships between the two templates of intermediate size. The network topology is such that the addition of different preformed templates as instructions to a mixture of all starting materials elicits system-level behavior. Instruction with a single template up-regulates the formation of two templates in a predictable manner. These results demonstrate that the rules governing system-level behavior can be unraveled through the application of wholly synthetic networks with well-defined chemistries and interactions.
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Affiliation(s)
- Jan W Sadownik
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
| | - Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
| | - Douglas Philp
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
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27
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Altay Y, Tezcan M, Otto S. Emergence of a New Self-Replicator from a Dynamic Combinatorial Library Requires a Specific Pre-Existing Replicator. J Am Chem Soc 2017; 139:13612-13615. [PMID: 28910535 PMCID: PMC5632813 DOI: 10.1021/jacs.7b07346] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Our
knowledge regarding the early steps in the formation of evolvable
life and what constitutes the minimal molecular basis of life remains
far from complete. The recent emergence of systems chemistry reinvigorated
the investigation of systems of self-replicating molecules to address
these questions. Most of these studies focus on single replicators
and the effects of replicators on the emergence of other replicators
remains under-investigated. Here we show the cross-catalyzed emergence
of a novel self-replicator from a dynamic combinatorial library made
from a threonine containing peptide building block, which, by itself,
only forms trimers and tetramers that do not replicate. Upon seeding
of this library with different replicators of different macrocycle
size (hexamers and octamers), we observed the emergence of hexamer
replicator consisting of six units of the threonine peptide only when
it is seeded with an octamer replicator containing eight units of
a serine building block. These results reveal for the first time how
a new replicator can emerge in a process that relies critically on
the assistance by another replicator through cross-catalysis and that
replicator composition is history dependent.
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Affiliation(s)
- Yigit Altay
- Centre for Systems Chemistry, Stratingh Institute , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Meniz Tezcan
- Centre for Systems Chemistry, Stratingh Institute , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sijbren Otto
- Centre for Systems Chemistry, Stratingh Institute , Nijenborgh 4, 9747 AG Groningen, The Netherlands
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28
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Kosikova T, Philp D. A Critical Cross-Catalytic Relationship Determines the Outcome of Competition in a Replicator Network. J Am Chem Soc 2017; 139:12579-12590. [DOI: 10.1021/jacs.7b06270] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
| | - Douglas Philp
- School of Chemistry and EaStCHEM, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, United Kingdom
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29
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Urtel GC, Rind T, Braun D. Reversible Switching of Cooperating Replicators. PHYSICAL REVIEW LETTERS 2017; 118:078102. [PMID: 28256863 DOI: 10.1103/physrevlett.118.078102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 06/06/2023]
Abstract
How can molecules with short lifetimes preserve their information over millions of years? For evolution to occur, information-carrying molecules have to replicate before they degrade. Our experiments reveal a robust, reversible cooperation mechanism in oligonucleotide replication. Two inherently slow replicating hairpin molecules can transfer their information to fast crossbreed replicators that outgrow the hairpins. The reverse is also possible. When one replication initiation site is missing, single hairpins reemerge from the crossbreed. With this mechanism, interacting replicators can switch between the hairpin and crossbreed mode, revealing a flexible adaptation to different boundary conditions.
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Affiliation(s)
- Georg C Urtel
- Systems Biophysics, Physics Department, NanoSystems Iniative Munich and Center for Nanoscience Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 München, Germany
| | - Thomas Rind
- Systems Biophysics, Physics Department, NanoSystems Iniative Munich and Center for Nanoscience Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 München, Germany
| | - Dieter Braun
- Systems Biophysics, Physics Department, NanoSystems Iniative Munich and Center for Nanoscience Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799 München, Germany
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30
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Avinash MB, Sandeepa KV, Govindaraju T. Emergent Behaviors in Kinetically Controlled Dynamic Self-Assembly of Synthetic Molecular Systems. ACS OMEGA 2016; 1:378-387. [PMID: 31457135 PMCID: PMC6640818 DOI: 10.1021/acsomega.6b00155] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 09/05/2016] [Indexed: 05/29/2023]
Abstract
Living systems are categorically a kinetic state of matter that exhibits complex functions and emergent behaviors. By contrast, synthetic systems are relatively simple and are typically controlled by the thermodynamic parameters. To understand this inherent difference between the biological and synthetic systems, novel approaches are of vital importance. In this regard, we have designed a three-component molecular system (a triad) by conjugating an amino acid with two functional molecules (naphthalenediimide and pyrene), which facilitates kinetically controlled self-assemblies. Herein, we describe three different molecular aggregation states of triads (entitled State I, State II, and State III) and also the dynamic pathway complexities associated with their transformations from one state to another. By meticulously employing the triads of different molecular aggregation states and the stereochemical information of the amino acid, we report emergent behaviors termed "supramolecular speciation" and "supramolecular regulation". Further, we present a hitherto unknown emergent property in a self-assembled state under the majority-rules experiment, which has been termed "super-nonlinearity". This work provides novel insights into complex synthetic systems having unprecedented functions and properties. Such emergent behaviors of synthetic triads that involve an interplay among complex interactions may find relevance in the context of prebiotic chemical evolution.
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Bottero I, Huck J, Kosikova T, Philp D. A Synthetic Replicator Drives a Propagating Reaction-Diffusion Front. J Am Chem Soc 2016; 138:6723-6. [PMID: 27177046 DOI: 10.1021/jacs.6b03372] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple synthetic autocatalytic replicator is capable of establishing and driving the propagation of a reaction-diffusion front within a 50 μL syringe. This replicator templates its own synthesis through a 1,3-dipolar cycloaddition reaction between a nitrone component, equipped with a 9-ethynylanthracene optical tag, and a maleimide. Kinetic studies using NMR and UV-vis spectroscopies confirm that the replicator forms efficiently and with high diastereoselectivity, and this replication process brings about a dramatic change in optical properties of the sample-a change in the color of the fluorescence in the sample from yellow to blue. The addition of a small amount of the preformed replicator at a specific location within a microsyringe, filled with the reaction building blocks, results in the initiation and propagation of a reaction-diffusion front. The realization of a replicator capable of initiating a reaction-diffusion front provides a platform for the examination of interconnected replicating networks under out-of-equilibrium conditions involving diffusion processes.
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Affiliation(s)
- Ilaria Bottero
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Jürgen Huck
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Tamara Kosikova
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Douglas Philp
- School of Chemistry and EaStCHEM, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
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Abstract
A review covering the previous 25 years study into self-replicating systems.
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Affiliation(s)
- Gregory Clixby
- University of Sheffield
- Department of Chemistry
- Sheffield
- UK
| | - Lance Twyman
- University of Sheffield
- Department of Chemistry
- Sheffield
- UK
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Singhal A, Nielsen PE. Cross-catalytic peptide nucleic acid (PNA) replication based on templated ligation. Org Biomol Chem 2015; 12:6901-7. [PMID: 25057801 DOI: 10.1039/c4ob01158a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first PNA self-replicating system based on template directed cross-catalytic ligation, a process analogous to biological replication. Using two template PNAs and four pentameric precursor PNAs, all four possible carbodiimide assisted amide ligation products were detected and identified by HPLC and MALDI-TOF analysis. We conclude that the two template complementary reaction products are generated via cross-catalysis, while the other two self-complementary (and in principle auto-catalytic) products are formed via intra-complex coupling between the two sets of complementary PNA precursors. Cross-catalytic product formation followed product inhibited kinetics, but approximately two replication rounds were observed. Analogous but less efficient replication was found for a similar tetrameric system. These results demonstrate that simpler nucleobase replication systems than natural oligonucleotides are feasible, thereby strengthening the foundation for the discussion of a possible role for PNA (like) genetic material in the prebiotic evolution of life and lay the ground for further studies into evolution of such potentially prebiotic systems.
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Affiliation(s)
- Abhishek Singhal
- Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, The Panum Institute, Blegdamsvej 3c, DK-2200 Copenhagen N, Denmark.
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Dadon Z, Wagner N, Alasibi S, Samiappan M, Mukherjee R, Ashkenasy G. Competition and Cooperation in Dynamic Replication Networks. Chemistry 2014; 21:648-54. [DOI: 10.1002/chem.201405195] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Indexed: 11/09/2022]
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Weber L. In vitro combinatorial chemistry to create drug candidates. DRUG DISCOVERY TODAY. TECHNOLOGIES 2014; 1:261-7. [PMID: 24981494 DOI: 10.1016/j.ddtec.2004.11.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In vitro combinatorial chemistry represents a variety of technologies where the selection and synthesis of novel molecules is performed in one integrated process. In its application towards drug discovery, the biological target is used to select and/or to amplify compounds out of a large pool of potential combinatorial compound library members. Recent examples provide a first proof-of-concept that dynamic combinatorial libraries or 'click chemistry' are able to discover highly potent and selective small molecule inhibitors of target enzymes.:
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Affiliation(s)
- Lutz Weber
- Morphochem AG, Gmunder Street 37-37A, 81379 München, Germany.
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37
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Malakoutikhah M, Peyralans JJP, Colomb-Delsuc M, Fanlo-Virgós H, Stuart MCA, Otto S. Uncovering the selection criteria for the emergence of multi-building-block replicators from dynamic combinatorial libraries. J Am Chem Soc 2013; 135:18406-17. [PMID: 24219346 DOI: 10.1021/ja4067805] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A family of self-replicating macrocycles was developed using dynamic combinatorial chemistry. Replication is driven by self-assembly of the replicators into fibrils and relies critically on mechanically induced fibril fragmentation. Analysis of separate dynamic combinatorial libraries made from one of six peptide-functionalized building blocks of different hydrophobicity revealed two selection criteria that govern the emergence of replicators from these systems. First, the replicators need to have a critical macrocycle size that endows them with sufficient multivalency to enable their self-assembly into fibrils. Second, efficient replication occurs only for library members that are of low abundance in the absence of a replication pathway. This work has led to spontaneous emergence of replicators with unrivalled structural complexity, being built from up to eight identical subunits and reaching a MW of up to 5.6 kDa. The insights obtained in this work provide valuable guidance that should facilitate future discovery of new complex self-replicating molecules. They may also assist in the development of new self-synthesizing materials, where self-assembly drives the synthesis of the very molecules that self-assemble. To illustrate the potential of this concept, the present system enables access to self-assembling materials made from self-synthesizing macrocycles with tunable ring size ranging from trimers to octamers.
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Affiliation(s)
- Morteza Malakoutikhah
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Ruiz-Mirazo K, Briones C, de la Escosura A. Prebiotic Systems Chemistry: New Perspectives for the Origins of Life. Chem Rev 2013; 114:285-366. [DOI: 10.1021/cr2004844] [Citation(s) in RCA: 563] [Impact Index Per Article: 51.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kepa Ruiz-Mirazo
- Biophysics
Unit (CSIC-UPV/EHU), Leioa, and Department of Logic and Philosophy
of Science, University of the Basque Country, Avenida de Tolosa 70, 20080 Donostia−San Sebastián, Spain
| | - Carlos Briones
- Department
of Molecular Evolution, Centro de Astrobiología (CSIC−INTA, associated to the NASA Astrobiology Institute), Carretera de Ajalvir, Km 4, 28850 Torrejón de Ardoz, Madrid, Spain
| | - Andrés de la Escosura
- Organic
Chemistry Department, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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Bissette AJ, Fletcher SP. Mechanisms of Autocatalysis. Angew Chem Int Ed Engl 2013; 52:12800-26. [DOI: 10.1002/anie.201303822] [Citation(s) in RCA: 273] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Indexed: 12/17/2022]
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Dadon Z, Samiappan M, Shahar A, Zarivach R, Ashkenasy G. A High-Resolution Structure that Provides Insight into Coiled-Coil Thiodepsipeptide Dynamic Chemistry. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303900] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Dadon Z, Samiappan M, Shahar A, Zarivach R, Ashkenasy G. A high-resolution structure that provides insight into coiled-coil thiodepsipeptide dynamic chemistry. Angew Chem Int Ed Engl 2013; 52:9944-7. [PMID: 23929823 DOI: 10.1002/anie.201303900] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/16/2013] [Indexed: 01/29/2023]
Abstract
Stable and reactive: A crystal structure at 1.35 Å of a thioester coiled-coil protein reveals high similarity to all-peptide-bond proteins. In these assemblies, the thioester bonds are kept reactive towards thiol molecules in the mixture. This enables efficient domain exchange between proteins in response to changes in folding conditions or introduction of external templates.
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Affiliation(s)
- Zehavit Dadon
- Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva, 84105 (Israel)
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43
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Dieckmann A, Houk KN. Analysis of supramolecular complex energetics in artificial replicators. Chem Sci 2013. [DOI: 10.1039/c3sc51192h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Abstract
Synthetic life: the origin of life on the early Earth, and the ex novo transition of non-living matter to artificial living systems are deep scientific challenges that provide a context for the development of new chemistries with unknown technological consequences. This Essay attempts to re-frame some of the epistemological difficulties associated with these questions into an integrative framework of proto-life science. Chemistry is at the heart of this endeavour.
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Affiliation(s)
- Stephen Mann
- Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, UK.
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Wang F, Elbaz J, Willner I. Enzyme-free amplified detection of DNA by an autonomous ligation DNAzyme machinery. J Am Chem Soc 2012; 134:5504-7. [PMID: 22404383 DOI: 10.1021/ja300616w] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The Zn(2+)-dependent ligation DNAzyme is implemented as a biocatalyst for the amplified detection of a target DNA by the autonomous replication of a nucleic acid reporter unit that is generated by the catalyzed ligation process. The reporter units enhance the formation of active DNAzyme units, thus leading to the isothermal autocatalytic formation of the reporter elements. The system was further developed and applied for the amplified detection of Tay-Sachs genetic disorder mutant, with a detection limit of 1.0 × 10(-11) M. Besides providing a versatile paradigm for the amplified detection of DNA, the system reveals a new, enzyme-free, isothermal, autocatalytic mechanism that introduces means for effective programmed synthesis.
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Affiliation(s)
- Fuan Wang
- Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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47
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Huck J, Philp D. Replication Processes-From Autocatalysis to Systems Chemistry. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dadon Z, Samiappan M, Wagner N, Ashkenasy G. Chemical and light triggering of peptide networks under partial thermodynamic control. Chem Commun (Camb) 2012; 48:1419-21. [DOI: 10.1039/c1cc14301h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Eschenmoser A. Ätiologie potentiell primordialer Biomolekül-Strukturen: Vom Vitamin B12 zu den Nukleinsäuren und der Frage nach der Chemie der Entstehung des Lebens - ein Rückblick. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103672] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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