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Related Concept Videos

RNA Structure01:23

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
RNA Structure01:19

RNA Structure

The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...

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Related Experiment Video

Updated: Jul 5, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

RNA-templated semiconductor nanocrystals.

Nan Ma1, Chad J Dooley, Shana O Kelley

  • 1Eugene F. Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA.

Journal of the American Chemical Society
|September 28, 2006
PubMed
Summary
This summary is machine-generated.

Transfer RNA (tRNA) templating enables precise synthesis of cadmium sulfide (CdS) semiconductor nanocrystals. Controlling tRNA structure allows for engineering of nanocrystal properties at the nanoscale.

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Nanomanipulation of Single RNA Molecules by Optical Tweezers
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Single-Molecule Surface-Enhanced Raman Scattering Measurements Enabled by Plasmonic DNA Origami Nanoantennas
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Single-Molecule Surface-Enhanced Raman Scattering Measurements Enabled by Plasmonic DNA Origami Nanoantennas

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Biomolecular templates offer unique structural control for nanomaterial synthesis.
  • Transfer RNA (tRNA) possesses a defined three-dimensional structure suitable as a scaffold.
  • Semiconductor nanocrystals like cadmium sulfide (CdS) have diverse applications.

Purpose of the Study:

  • To investigate the use of tRNA as a template for CdS semiconductor nanocrystal synthesis.
  • To explore how tRNA structure influences the resulting nanocrystal properties.
  • To demonstrate the potential of biomolecules in engineering semiconductor materials.

Main Methods:

  • Aqueous synthesis of CdS semiconductor nanocrystals using tRNA as a biomolecular template.
  • Utilizing folded and unstructured tRNA variants (via mutations) to observe structural effects.
  • Characterization of synthesized nanocrystal structures and properties.

Main Results:

  • A single CdS nanocrystal product was obtained when using folded, three-dimensional tRNA.
  • A range of CdS nanocrystal products were observed when using unstructured tRNA.
  • Nanocrystal structure and properties are directly modulated by the templating tRNA's structure.

Conclusions:

  • Biomolecules, specifically tRNA, can be systematically employed to engineer semiconductor nanocrystal structures.
  • The precise control over nanocrystal dimensions and properties is achievable through biomolecular templating.
  • Synergy between nanostructure dimensions and biomolecule structure enables nanoscale material property tuning.