Novel Insight into the Copper-Ligand Geometry in the Crystal Structure of Ulva pertusa Plastocyanin at 1.6-Å Resolution

Abstract

The crystal structure of plastocyanin from a green alga, Ulva pertusa, has been determined at 1.6-Å resolu-tion. At its copper site, U. pertusa plastocyanin has a distorted tetrahedral coordination geometry similar to other plastocyanins. In comparison with structures of plastocyanins reported formerly, a Cu(II)-S ␦