What is bisulfite PCR?

Oxidative bisulfite sequencing is a method to discriminate between 5-methylcytosine and 5-hydroxymethylcytosine at single base resolution. The method employs a specific (Tet-assisted) chemical oxidation of 5-hydroxymethylcytosine to 5-formylcytosine, which subsequently converts to uracil during bisulfite treatment.

What does bisulfite do to DNA?

Bisulfite Conversion is a process in which genomic DNA is denatured (made single-stranded) and treated with sodium bisulfite, leading to deamination of unmethylated cytosines into uracils, while methylated cytosines (both 5-methylcytosine and 5-hydroxymethylcytosine) remain unchanged.

How do you quantify bisulfite converted DNA?

Quantification of Bisulfite-Converted DNA Converted DNA should be quantitated as RNA using a UV spectrophotometer (NanoDrop) with Ab260 nm 1.0 = 40 µg/ml.

What is bisulfite formula?

NaHSO3Sodium bisulfite / Formula

What is sodium bisulfite treatment used for?

Sodium bisulfite DNA treatment allows for discrimination between methylated and unmethylated cytosines.

Is bisulfite converted DNA single stranded?

In bisulfite conversion, DNA is first denatured so that it is single stranded. The addition of sodium bisulfite will sulfonate unmethylated cytosines at a low pH, which then undergo spontaneous deamination into sulfonated uracil molecules, and subsequent desulfonation results in uracil molecules [28].

What does bisulfite react with?

Organic synthesis In organic chemistry, “sodium bisulfite” is used to form adducts with aldehyde and with certain cyclic ketones. These adducts are α-hydroxysulfonic acids. This reaction is useful for the purification of aldehydes.

What is difference between sulfite and bisulfite?

As nouns the difference between bisulfite and sulfite is that bisulfite is (inorganic chemistry) the univalent group -hso3, or any salt containing it while sulfite is (inorganic chemistry) any salt of sulfurous acid.

What is the best way to amplify bisulfite treated DNA?

Bisulfite Sequencing. PCR amplification of bisulfite-treated DNA requires an enzyme capable of tolerating uracil-containing DNA and high AT targets (conversion of unmodified cytosines to thymines increases the AT ratio of the target DNA). NEB’s EpiMark Taq DNA polymerase has been optimized for successful amplification of bisulfite-treated DNA.

How to prepare sodium bisulfite solution from digested DNA?

• It takes at least 10 minutes for the sodium bisulfite to dissolve, start preparing sodium bisulfite solution while pellet in step 2 is drying 5) Heat digested DNA at 97 ° C 1 minutes in PCR machine. Quench in ice water for 1 minute. Spin down for 2-3 seconds. 6) Add 1 μ l of 6.3M NaOH ( freshly prepared NaOH from above ).

How to analyze bisulfite-converted human genomic DNA?

Samples of bisulfite converted human genomic DNA were run in a 2% agarose gel with a 100 bp marker visualized normally (left panel) and after chilling in an ice bath (right panel). Bisulfite PCR is the most common technique used for methylation analysis of bisulfite-converted DNA and also the most susceptible to mishap.

Can I use pyrosequencing to sequence bisulfite PCR products?

Direct sequencing of bisulfite PCR products is not recommended as it generally yields poor sequencing quality and will confound quantification of partially methylated sites. Pyrosequencing can be used as an alternative to direct sequencing.