Nucleoside diphosphate kinase from the slime mold Dictyostelium discoideum is highly homologous to gene products that are involved in development in Drosophila and in oncogenesis in human cells. The cloned protein expressed in Escherichia coli has been purified and crystallized in a hexagonal space group with a = b = 74.9 A, c = 211.4 A. The asymmetric unit contains either one or two 17,000 Mr subunits of the hexamer.
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