A'α-helix of LOV2
Protein DomainThe A'α-helix is an N-terminal upstream element of the Arabidopsis thaliana phototropin1 LOV2 photosensory module that interacts with the Jα-helix and contributes to blue-light signal transmission to the downstream serine/threonine kinase. Truncation of this region or Ala substitution of conserved A'α/Aβ-gap residues Glu474 and Lys475 impairs blue-light-induced kinase activation in phot1 LOV2-STK polypeptides.