Bacteriophage T7 DNA helicase crystal structures
The products of the "reaction" then are single strands of DNA that have been unzipped and can then be replicated by other enzymes.
We never really give much thought to how much work our proteins do inside our bodies, and rarely do we recognize them at all unless something goes wrong. But when we think about DNA helicase, this one tiny protein that is an integral part of all living organisms, it's an incredible thought. This enzyme has been working since the very moment our cells began replicating, and without it, we wouldn't have made it past one cell! Not one organism on earth would be alive were it not for this motor enzyme moving along the backbone of the nucleic acids that make up our DNA. And even though most DNA replication errors occur later down the line, DNA helicase still has a pretty impressive record for how few mistakes it makes. This protein is essential for multicellular life to happen and be sustained. Be thankful for DNA Helicase!
A proposed mechanism for how DNA helicase works can be seen at http://www.youtube.com/watch?v=UWNhwceMjfk
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