what is DNase I?

Question

what can it be used for

Answer 1

I use DNase I everyday to perform DNase I footprinting studies. These help me determine the binding properties of certain compounds to DNA.

You can also use DNase II and micrococcal nuclease though they different cleavage patterns.

DNase I can also be used to remove DNA from RNA samples to avoid genomic DNA contamination of samples for qPCR experiments.

DNase I has a preferred sequence-selectivity and does not cut all bands equally. It especially dislikes runs of poly(A), poly(T) and poly (AT).

If you want to see some images of the applications then just PM me. I've published several papers using DNAse I footprinting so I'm more than happy to share the results.

Answer 2

A deoxyribonuclease (DNase, for short) is any enzyme that catalyzes the hydrolytic cleavage of phosphodiester linkages in the DNA backbone. Deoxyribonucleases are thus one type of nuclease. A wide variety of deoxyribonucleases are known, which differ in their substrate specificities, chemical mechanisms, and biological functions.

Deoxyribonuclease I cleaves DNA preferentially at phosphodiester linkages adjacent to a pyrimidine nucleotide, yielding 5'-phosphate terminated polynucleotides with a free hydroxyl group on position 3', on average producing tetranucleotides. It acts on single-stranded DNA, double-stranded DNA, and chromatin. DNase I is also a polymerization initiator for the cytoskeletal protein actin. It has been suggested to be one of the deoxyribonucleases responsible for DNA fragmentation during apoptosis.

You could get more information from the link below...

Answer 3

In biology, anything that ends to -ase is an enzyme. DNase is an enzyme that catalyzes the hydrolysis of DNA.