Preliminary X-ray data for a D-amino acid amino-transferase from a novel thermophilic Bacillus |
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| Authors: | B Stoddard L Howell S Asano K Soda K Tanizawa D Ringe G A Petsko |
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| Institution: | Department of Chemistry, Massachusetts Institute of Technology, Cambridge 12139. |
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| Abstract: | Crystals of the D-amino acid aminotransferase (D-ATA) from a novel thermophilic Bacillus species (Escherichia coli pICT113 cloned gene product) have been examined by X-ray analysis. The crystals grow as hexagonal prisms, with the symmetry of space group P61 or P65 (indistinguishable crystallographically). The cell dimensions are a = b = 135 A, c = 53 A, alpha = beta = 90 degrees, and gamma = 120 degrees. The unit cell has a volume of 850,000 A3 with six asymmetric units per unit cell. There is one dimer of molecular weight 62,000 per asymmetric unit, and the crystals diffract to 2.7 A. |
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