DNA Gyrase vs. DNA Helicase - Biology Forum

last updated by

sdekivit 18 years, 11 months ago

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- November 29, 2005 at 2:10 am #2692
  jayson
  Participant
  What is the difference between the two ? (not structurelly (sp?), but by function)
  Thanks in advance.
- November 29, 2005 at 8:58 pm #33826
  sdekivit
  Participant
  DNA gyrase produces DNA supercoiling and DNA helicase unwinds DNA
- November 29, 2005 at 8:58 pm #33827
  jayson
  Participant
  Doesn’t Gyrase also relive the tension from the DNA strand.
- November 30, 2005 at 1:37 am #33859
  Jennifer
  Participant
  DNA helicase unwinds the double helix by disrupting the hydrogen bonds of the base pairs of nucleotides. DNA gyrase relieves the tension from the unwinding of the double helix by cutting the strand, and reannealing it once the tension has been released.
- November 30, 2005 at 3:32 pm #33905
  sdekivit
  Participant
  NOOOOOOO!!!!!! DNA gyrase = DNA topoisomerase II and produces negative supercoils
  –> DNA topoisomerase I relaxes these negative supercoils.
  DNA helicase pulls the DNA strands away from each other for transcription and is completely different from producing/relaxing supercoils
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