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Nucleic Acids and Nucleotides

Nucleic Acids and Nucleotides

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria. In...

Nucleic acids

Nucleic acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...

Nucleic Acids

Nucleic Acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...

Nucleic Acids

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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...

Nucleic Acids

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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...

Nucleoid

Nucleoid

The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...

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Updated: May 20, 2026

Residue-specific Incorporation of Noncanonical Amino Acids into Model Proteins Using an Escherichia coli Cell-free Transcription-translation System

Residue-specific Incorporation of Noncanonical Amino Acids into Model Proteins Using an Escherichia coli Cell-free Transcription-translation System

Published on: August 1, 2016

Structure and function of noncanonical nucleobases.

Thomas Carell¹, Caterina Brandmayr, Antje Hienzsch

¹Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany. thomas.carell@lmu.de

Angewandte Chemie (International Ed. in English)

|June 30, 2012

Summary

Modified nucleosides in DNA and RNA add a second layer of information, crucial for gene regulation and cellular function. This chemical diversity is essential for complex organisms.

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Residue-specific Incorporation of Noncanonical Amino Acids into Model Proteins Using an Escherichia coli Cell-free Transcription-translation System

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Published on: August 1, 2016

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Area of Science:

Molecular Biology
Epigenetics
Biochemistry

Background:

DNA and RNA possess canonical nucleobases alongside modified nucleosides.
Modified nucleosides expand the information content and functional capabilities of nucleic acids.
RNA is especially rich in modifications, reflecting its diverse roles.

Purpose of the Study:

To highlight the significance of modified nucleosides in DNA and RNA.
To underscore the role of chemical diversity in epigenetic regulation.
To explain the contribution of modified nucleosides to cellular function.

Main Methods:

Review of existing literature on nucleic acid modifications.
Analysis of the chemical structures of modified nucleosides.
Comparison of canonical and non-canonical nucleobases in DNA and RNA.

Main Results:

Modified nucleosides establish a critical second layer of information in RNA.
DNA in higher organisms contains four key epigenetic bases: m(5)dC, hm(5)dC, f(5)dC, and ca(5)dC.
Chemical diversity through modified nucleosides is vital for gene silencing and activation.

Conclusions:

Modified nucleosides are fundamental to understanding gene regulation and cellular complexity.
The epigenetic landscape relies on the chemical diversity provided by modified DNA and RNA bases.
Further research into modified nucleosides will illuminate their roles in biological systems.