The Structure of a Non-Heme Iron Protein: Rubredoxin at 1.5 A Resolution

Rubredoxin is a non-heme iron-sulfur protein first isolated from the bacterium C. pasteurianum by Lovenberg and Sobel (1965) which has since been found to occur in a number of other anaerobic bacteria. All rubredoxins studied thus far are found to have one iron atom and four cysteine sulfur atoms per molecule of weight approximately 6000 daltons except for that isolated from P. oleovorans (Lode and Coon, 1971). The latter is reported to have either one or two iron atoms and ten cysteine sulfur atoms per molecule of weight 19,000 daltons.