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The cupredoxin domain of a putative type 1 blue copper protein (BCB) from Arabidopsis thaliana was overexpressed and purified. A recursive polymerase chain reaction method was used to synthesize an artificial coding region for the cupredoxin domain of horseradish stellacyanin (commonly known as
We describe the amino acid sequence of plantacyanin isolated from spinach leaves. This small basic copper-binding plant cupredoxin contains 91 amino acids (accession no. S70746) and its theoretical average mass of 9788.2 Da was confirmed by electrospray ionization mass spectrometry. When compared to
The crystal structure of the cucumber basic protein (CBP), a type 1 or blue copper protein, has been refined at 1.8 A resolution. The molecule resembles other blue copper proteins in having a Greek key beta-barrel structure, except that the barrel is open on one side and is better described as a