Leucine zipper

Leucine zipper
A protein structural motif common in transcription factors. Leucine zipper is formed by two proteins (homodimmer or heterodimmer) and binds to DNA.
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Leucine zipper: A motif found in certain proteins in which Leu residues are evenly spaced through an a-helical region, such that they would end up on the same face of the helix. Dimers can form between two such proteins.

Basic region leucine zipper (bZIP) Transcription Factor Gene Family
Calcium Dependent Protein Kinase
Calmodulin-binding Proteins ...

DNA binding motif: Common sites on different proteins which facilitate their binding to DNA. Examples are leucine zipper and zinc finger proteins. Any such protein is called DNA-binding protein.

See also: Trans, Protein, Proteins, Transcription factor, Transcript