The three-dimensional structure of the seed storage protein phaseolin at 3 A resolution.

Abstract
The polypeptides of the trimeric seed storage protein phaseolin comprise two structurally similar units each made up of a beta‐barrel and an alpha‐helical domain. The beta‐barrel has the ‘jelly‐roll’ folding topology of the viral coat proteins and the alpha‐helical domain shows structural similarity to the helix‐turn‐helix motif found in certain DNA‐binding proteins.