Related Experiment Video
Updated: Jan 30, 2026

05:37
Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
Published on: April 4, 2025
1.3K
Shining a Spotlight on DNA: Single-Molecule Methods to Visualise DNA
Gurleen Kaur1, Jacob S Lewis2,3, Antoine M van Oijen4,5
1School of Chemistry and Molecular Bioscience and Molecular Horizons, University of Wollongong, Wollongong 2522, Australia. gk980@uowmail.edu.au.
Molecules (Basel, Switzerland)
|February 2, 2019
Summary
Visualizing single DNA molecules offers new insights into nucleic acid transactions. This review highlights methods for DNA visualization and their use in biophysical assays.
Area of Science:
- Biophysics
- Molecular Biology
- Biochemistry
Background:
- Single-molecule imaging techniques have revolutionized the study of DNA.
- Understanding DNA mechanics, dynamics, and protein interactions is crucial.
- Visualizing DNA is key to comprehending complex biochemical reactions.
Purpose of the Study:
- To summarize methodological advancements in visualizing individual DNA molecules.
- To discuss the application of these visualization probes in single-molecule biophysical assays.
Main Methods:
- Development of imaging strategies for DNA visualization.
- Utilization of small molecules and protein-based probes.
- Application in single-molecule biophysical assays.
Main Results:
- Advancements in DNA visualization methods.
- Successful application of probes in studying DNA dynamics and interactions.
- Enhanced understanding of DNA-related biochemical processes.
Conclusions:
- Single-molecule visualization techniques are powerful tools in nucleic acid research.
- Methodological developments continue to advance the field of DNA biophysics.
- These techniques are essential for investigating complex biological transactions involving DNA.
Related Concept Videos
DNA Helicases
24.1K
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
24.1K
DNA Topoisomerases
35.4K
Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types. ...
Types and Mechanism of action
Topoisomerases are divided into two main types. ...
35.4K
The DNA Helix
157.3K
Overview
157.3K
The DNA Replication Fork
40.9K
An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork. Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
40.9K
DNA Isolation
199.4K
DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.
199.4K
DNA-only Transposons
17.4K
DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
The donor site from where the transposon is excised is either degraded or...
17.4K

