Related Experiment Video
Updated: Feb 8, 2026
07:20
Author Spotlight: Epigenetic Modifications and Metabolic Rewiring as Targets for Cancer Therapy
Published on: October 18, 2024
997
An update on conformation sensitive gel electrophoresis
1Department of Genetics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Human Mutation
|April 5, 2002
Summary
Conformation-sensitive gel electrophoresis (CSGE) is a cost-efficient method for detecting gene sequence variations, including single nucleotide polymorphisms (SNPs). This technique enhances DNA heteroduplex analysis for sensitive and specific mutation scanning.
Area of Science:
- Molecular Biology
- Genetics
Background:
- Gene sequence variation screening is crucial for genetic research and diagnostics.
- Existing methods for mutation detection can be costly and time-consuming.
Purpose of the Study:
- To introduce and evaluate Conformation-Sensitive Gel Electrophoresis (CSGE) as a novel method for screening large multi-exon genes.
- To assess the sensitivity and specificity of CSGE for detecting various DNA sequence variations, including single nucleotide polymorphisms (SNPs).
Main Methods:
- Development of CSGE utilizing a non-proprietary acrylamide gel matrix with 1,4-bis(acrolyl)piperazine (BAP) cross-linker.
- Application of mildly denaturing solvents (ethylene glycol and formamide) to enhance DNA heteroduplex conformation polymorphism.
- Adaptation of CSGE to a fluorescent platform (F-CSGE) for increased throughput and sensitivity.
Main Results:
- CSGE effectively detects sequence variations as small as single nucleotide polymorphisms (SNPs).
- Heteroduplex conformation is most influenced by the nature of the mismatched base and its sequence context.
- PCR product size and mismatch location within the product significantly impact heteroduplex resolution during CSGE.
Conclusions:
- CSGE offers a powerful, cost-effective, and highly sensitive method for scanning genes for sequence variations.
- While effective, CSGE may have limitations in resolving closely linked sequence variations, necessitating sequencing for precise identification in complex cases like BRCA1 and BRCA2.
Related Concept Videos
01:22Two-dimensional Gel Electrophoresis
7.5K
Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
7.5K
02:35DNA Agarose Gel Electrophoresis
114.1K
Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
114.1K
01:20Conformity
48.2K
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group.
48.2K
02:20Conformations of Butane
18.2K
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are...
18.2K
02:29Conformations of Cycloalkanes
14.6K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
14.6K
02:11Conformations of Cyclohexane
15.8K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
15.8K