PMID:8864839
| Citation |
Sakai, H, Sakabe, N, Sasaki, K, Hashimoto, W, Suzuki, H, Tachi, H, Kumagai, H and Sakabe, K (1996) A preliminary description of the crystal structure of gamma-glutamyltranspeptidase from E. coli K-12. J. Biochem. 120:26-8 |
|---|---|
| Abstract |
The structure of GGT [EC 2.3.2.2] from E. coli K-12 was studied at 3 A resolution by X-ray crystallography. Initial protein phases were calculated using two kinds of Pb2+ derivatives. The phases were refined by non-crystallographic 2-fold symmetry electron density averaging combined with solvent flattening and histogram matching. The GGT molecule has overall dimensions of 60 x 50 x 40 A. There are two antiparallel beta-pleated sheets consisting of 6 and 7 beta-strands. The two beta-sheets form a wall-like structure. Twelve short alpha-helices were detected, of which the maximum length appears to be four helix turns. |
| Links | |
| Keywords |
Crystallography, X-Ray; Escherichia coli/enzymology; Protein Conformation; gamma-Glutamyltransferase/chemistry |
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