Date of Award

6-18-2018

Document Type

Thesis

Degree Name

Bachelor of Science (B.S.) in Biochemistry and University Honors

Department

Chemistry

First Advisor

Niles Lehman

Subjects

Life -- Origin, RNA, Autocatalysis, Self-organizing systems, Molecular evolution

DOI

10.15760/honors.618

Abstract

It is becoming increasingly evident that at some point, very early in the evolutionary history of terrestrial life, a nascent RNA based chemical system emerged and spontaneously self-organized into hierarchically complex network structures. Recently, it has been mathematically predicted that the architecture of this primitive, prebiotic RNA system (or something very similar) could plausibly provide both the infrastructure and the chemical mechanisms necessary to facilitate a transition to the DNA/protein based biochemical processes universally observed in contemporary biological systems. Complex systems give rise to emergent phenomena through the localized interactions of a large number of agents, at varying scales throughout a network. Moreover, these interactions can be classified topologically, from which it becomes possible to gain insight into the seemingly unpredictable behavior these kinds of systems. Herein, we provide four examples of how the topological artifacts of local interactions between spontaneously self-assembling and self-organizing fragments of the Azoarcus ribozyme can inform both the emergence of decentralized organization and global population dynamics through modulation of kinetic parameters, thereby providing a rudimentary form of selection pressure through which the processes of chemical evolution may occur.

Persistent Identifier

https://archives.pdx.edu/ds/psu/25463

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