Propellers in biochemistry

The propellers are three-dimensional structures often met in the organic molecules.

Proteins

One meets several types of propellers in the Protéine S:
  • the propellers alpha, whose direction of gyration is time. It acts, by far, the helical structure most represented in proteins. One meets also right propeller 310 and propellers π. These three types of propellers are allowed by the Diagramme of Ramachandran.

Nucleic acids

The nucleic acids are organized into double helixes to satisfy leave them between bases. According to the conditions of the medium (salinity, water content), but also to a certain extent according to the composition in bases, the nucleic acids adopt one of the three conformation following:
  • propeller B double right helix found in DNA;
  • propeller has double right helix found in ARN and DNA;
  • propeller Z double left helix
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