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
P6
1 or
P6
5 (indistinguishable crystallographically). The cell dimensions are
a = b = 135
A
̊
, c = 53
A
̊
, α = β = 90 °,
and γ = 120 °
. The unit cell has a volume of 850,000 Å
3 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 Å.