INITIATING A CRYSTALLOGRAPHIC STUDY OF A CLASS-II FRUCTOSE-1,6-BISPHOSPHATE ALDOLASE

We have reproducibly crystallized the metal-dependent Class II fructose-1,6-bisphosphate aldolase from Escherichia coli. Crystals in the shape of truncated hexagonal bipyramids have unit cell dimensions of a = b = 78.4 A ̊, c = 290.6 A ̊ and are suitable for a detailed structural analysis. The space group has been identified as P6122 or enantiomorph. Data sets to approximately 2.9 Å resolution have been recorded using both the Rigaku R-AXIS IIc image plate area detector coupled to a copper target rotating anode X-ray source and using the MAR image plate systems with synchrotron radiation at the EMBL outstation DESY in Hamburg, and at S.R.S. Daresbury. Diffraction beyond 2.5 Å has been observed when large freshly grown crystals are used with the synchrotron beam. A data set to this resolution has been collected. Several putative heavy-atom derivative data sets have also been measured using synchrotron radiation facilities and analysis of these data sets is in progress. © 1992.