Catalyzes the hydration of cyanide to formamide. Degradation of cyanide may be important for plant pathogenic fungi in infection of cyanogenic plants. formamide = H2O + hydrogen cyanide Optimum pH is 6-7. Active fom pH 5 to pH 9. Oligomer of dimers, forming left-handed helical fibers with a diameter of 13 nm but with lengths ranging from approximately 1 um at the leading edge of the peak to having approximately the same length and diameter at the trailing edge. By cyanide. Belongs to the carbon-nitrogen hydrolase superfamily. Nitrilase family.