Solution Structure of Psb27 from Cyanobacterial Photosystem II,

Abstract

Psb27 is a highly conserved component of photosystem II. The three-dimensional structure has a well-defined helical core, composed of four helices arranged in a right-handed up−down−up−down fold, with a less ordered region of the structure located at the N-terminus. The position of conserved residues on the surface suggests conserved functional roles for distinct interconnected features encompassing a P−Φ−P loop, a polar patch spanning helices α3 and α4, and the N-terminal sequence.