About The Medical Condition Motif, Helix-Turn-Helix

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Find the definition of the medical term Motif, Helix-Turn-Helix. Motif, Helix-Turn-Helix defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.

Motif, Helix-Turn-Helix

Motif, Helix-Turn-Helix Medical Condition Defined & Explained
Motif, Helix-Turn-Helix Medical Condition

What's The Definition Of The Medical Condition Motif, Helix-Turn-Helix?

The first DNA-binding protein motif to be recognized. Helix-turn-helix motifs were originally identified in bacterial proteins but have since been found in hundreds of DNA-BINDING PROTEINS from both eukaryotes and prokaryotes. They are constructed from two alpha helices connected by a short extended chain of amino acids, which constitute the "turn." The two helices are held at a fixed angle, primarily through interactions between the two helices. (From Alberts et al., Molecular Biology of the Cell, 3d ed, p408-9)

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