InterPro domain: IPR038760

This entry represents photosystem II core complex protein psbY from plants. In higher plants, two related PsbY proteins exist, PsbY-1 and PsbY-2, which appear to function as a heterodimer. In spinach and Arabidopsis, these two proteins arise from a single-copy nuclear gene that is processed in the chloroplast. PsbY has two low manganese-dependent activities: a catalase-like activity and an L-arginine metabolising activity that converts L-arginine into ornithine and urea [ 1 ].

1. PsbY, a novel manganese-binding, low-molecular-mass protein associated with photosystem II. Mol. Gen. Genet. 260, 56-68