Purification, crystallisation and preliminary X‐ray analysis of the vanadium‐dependent haloperoxidase from Corallina officinalis

Abstract The vanadium-dependent haloperoxidase from the seaweed Corallina officinalis has been purified to homogeneity and crystallised. The protein is reported to be a hexamer of 12 × 64,000 Da, contains no haem, and is dependent on vanadium for activity. The crystals are grown from polyethylene glycol (PEG) 6,000 and 0.4 M potassium chloride. They are stable and diffract to better than 2 A resolution. They are of a cubic space group I 23 (or I2 ,3) with cell dimensions a = b = c = 310 A .