What is allele specific oligonucleotide hybridization?

Allele-specific oligonucleotide hybridization, or dot blotting, is a method for testing known mutations. Normal individuals show hybridization only with the normal probe; homozygous individuals show hybridization only with the mutant probe; and heterozygous individuals hybridize with both probes (normal and wild-type).

Are probes oligonucleotides?

Oligonucleotide Probes Most commonly, they are DNA, but RNA or NA analogs can also be synthesized. Probes used in homogeneous (real-time) PCR are usually oligonucleotides with a fluorescent label.

How does PCR SSOP work?

Sequence-Specific Oligonucleotide Probe (SSOP) Typing. The PCR products are denatured and blotted on a series of nylon membranes and probed with a panel of allele/group-specific probes. Positive hybridization of probes labeled with digoxigenin are detected by chemiluminescence and exposed to x-ray film.

What advantage does an ASO allele specific oligonucleotide dot blot assay have in which the ASO probes are bound to a nylon membrane compared to an ASO dot blot assay in which the patient samples are are bound to a nylon membrane?

The former assay in which the ASO probes are bound to a nylon membrane) provides for greater sample throughput because probes for different mutations can be multiplexed on the same membrane.

What is the principle of allele specific oligonucleotide?

An allele-specific oligonucleotide (ASO) is a short piece of synthetic DNA complementary to the sequence of a variable target DNA. It is designed (and used) in a way that makes it specific for only one version, or allele, of the DNA being tested.

What is meant by gene probe?

A gene probe (nucleic acid probe) is a single-stranded nucleic acid fragment that interacts with a complementary sequence of a target nucleic acid. The test is based upon the principles of nucleic acid hybridization reactions. Gene probes can be used for the rapid and specific identification of microorganisms.

What is PCR SSP?

Abstract. Sequence-specific amplification (SSP) is simply a form of polymerase chain reaction (PCR) which involves designing one or both primers so that they will or will not allow amplification (the 3′-mismatch principle). Its origins are probably legion, i.e. many people probably thought of it at the same time.

What is PCR SSOP?

The combination of PCR technology and hybridization with sequence-specific oligonucleotide probes was first applied to HLA class II typing because of the limitations of DR serology and of the better knowledge of allelic polymorphism at DR/DQ loci. …

What is Dot blot hybridization?

The dot-blot hybridization is a nucleic acid hybridization technique where complementary single-stranded sequences of the probe (either RNA or DNA) hybridizes with single-stranded sequences of the test samples (either RNA or DNA) under suitable conditions of temperature and salt concentration.

How are allele specific oligonucleotide probes used in PCR?

Allele-specific hybridization is a technique based on discriminating between alleles at SNP using allele-specific oligonucleotide (ASO) probes and exploits the 5′ exonuclease activity of DNA polymerases (Gaudet et al., 2009). Allele-specific PCR (AS-PCR) is achieved by PCR by an allele-specific primer rather than direct detection by a probe.

What are allele specific oligonucleotide hybridization methods?

Allele-specific oligonucleotide hybridization, or dot blotting, is a method for testing known mutations.

How are oligonucleotides used in genetic testing?

It acts as a probe for the presence of the target in a Southern blot assay or, more commonly, in the simpler Dot blot assay. It is a common tool used in genetic testing, forensics, and Molecular Biology research. An ASO is typically an oligonucleotide of 15–21 nucleotide bases in length.

How are oligonucleotide probes used in forward Aso?

In the forward ASO format, the PCR-amplified DNA fragments are immobilized onto a filter or membrane, and labeled oligonucleotide probes that are complementary and specific for a given DNA sequence are hybridized to the filter. Subsequently, the filter is washed at the appropriate stringency to dissociate any probe molecules and exposed.