Can we break the hydrogen bonds in DNA with Phonon?

AI Thread Summary
The discussion centers on the mechanisms of DNA denaturation, particularly the role of hydrogen bonds between nitrogenous bases in double-stranded DNA. It explores the potential of using phonons, which are sound waves, to break these hydrogen bonds as an alternative to high-temperature methods. The conversation also touches on the effects of shorter wavelengths, such as UV radiation, which can cause DNA damage through mechanisms like pyrimidine dimer formation and backbone breaks from ionizing radiation. Participants clarify the distinction between photons and phonons, with one noting that sonication is a common method for mechanically fragmenting DNA. The conversation highlights the energy requirements for inducing DNA breaks and raises questions about the feasibility of using sound pressure levels for this purpose, indicating some confusion about the concepts involved.
Anand Wilson
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Double stranded DNA are bind with hydrogen bonds in between the nitrogenous bases, Usually we use high temperature for denature,so can we break the hydrogen bonds with phonon because shorter wavelength give rise to heat, weather it is possible to denature the DNA?
 
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If you say, use microwaves to heat the water, I suppose you could indirectly use photons to denature DNA. Shorter wavelengths will usually induce DNA damage. For example, UV radiation can change the identity of some of the bases by creating pyrimidine dimers or oxidizing bases. Ionizing radiation, like x-rays or gamma radiation, is capable of causing breaks in the DNA backbone. For more information, see https://en.wikipedia.org/wiki/DNA_repair#DNA_damage
 
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Are we talking about photons or phonons? I think Anand and Ygggdrasil are on two different wavelengths here (pardon the pun :biggrin:).
 
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Ah, ok. I misread the question. Researchers often use sonication to mechanically fragment DNA into smaller pieces, so you might start breaking the DNA backbone before separating the DNA strands.
 
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Anand Wilson said:
Double stranded DNA are bind with hydrogen bonds in between the nitrogenous bases, Usually we use high temperature for denature,so can we break the hydrogen bonds with phonon because shorter wavelength give rise to heat, weather it is possible to denature the DNA?

Sure- a single strand break requires (IIRC) about 3 eV, while a double-strand break requires (again, IIRC) 25 eV.

http://www.ncbi.nlm.nih.gov/pubmed/12683817
http://iopscience.iop.org/1742-6596/373/1/012008/pdf/1742-6596_373_1_012008.pdf

From there, you can work out the required sound pressure levels.
 
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Sound pressure??, with high wave length! we can use sound! what about the short wave length if we need heat?
 
Anand Wilson said:
Sound pressure??, with high wave length! we can use sound! what about the short wave length if we need heat?

I think you need to read up on some basics- you seem to be mixing up a bunch of concepts.
 

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