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From DNA to Protein03:06

From DNA to Protein

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The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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The Central Dogma

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The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
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The Central Dogma01:25

The Central Dogma

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The Central Dogma01:20

The Central Dogma

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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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Self-Referential Encoding on Modules of Anticodon Pairs-Roots of the Biological Flow System.

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The Self-Referential Genetic Code is Biologic and Includes the Error Minimization Property.

Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life·2015
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Essentials in the Life Process Indicated by the Self-Referential Genetic Code.

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Three-Dimensional Algebraic Models of the tRNA Code and 12 Graphs for Representing the Amino Acids.

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Metabolic basis for the self-referential genetic code.

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Related Experiment Video

Updated: Apr 18, 2026

Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
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Essentials in the life process indicated by the self-referential genetic code.

Romeu Cardoso Guimarães1

  • 1Laboratório de Biodiversidade e Evolução Molecular, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270.901, Belo Horizonte, MG, Brazil, romeucardosoguimaraes@gmail.com.

Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life
|January 15, 2015
PubMed
Summary
This summary is machine-generated.

This study proposes that early genetic encoding, using glycine and serine, created a metabolic

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Origin of Life Studies

Background:

  • The origin of genetic encoding and protein synthesis is a fundamental question in understanding life's beginnings.
  • Early metabolic pathways likely played a crucial role in the emergence of self-replicating systems.

Purpose of the Study:

  • To propose a mechanism for how self-referential genetic encoding and protein synthesis could have been established.
  • To explore the role of metabolic pathways in the fixation of early biological processes.

Main Methods:

  • The study outlines a theoretical model based on existing biochemical and molecular biology principles.
  • It proposes a prototRNA dimer-directed mechanism for protein synthesis and encoding.

Main Results:

  • The proposed mechanism suggests that protein synthesis acts as a metabolic sink, driving the fixation of supporting pathways.
  • This self-reinforcing cycle, starting with one-carbon metabolism, leads to reproduction.

Conclusions:

  • Early genetic encoding and protein synthesis were likely intertwined with metabolic pathway development.
  • A feedback loop between metabolism and genetic processes could explain the emergence of early life.