The crystal structure of the 50 kDa metalloprotease from the Gram-negative bacterium Serratia marcescens has been solved and refined to a crystallographic R-factor of 0.192 at 1.80 A resolution. The structure is very similar to that of alkaline protease from Pseudomonas aeruginosa, in particular the calcium binding "parallel beta roll" motif is completely conserved ...
The crystal structure of the 50 kDa metalloprotease from the Gram-negative bacterium Serratia marcescens has been solved and refined to a crystallographic R-factor of 0.192 at 1.80 A resolution. The structure is very similar to that of alkaline protease from Pseudomonas aeruginosa, in particular the calcium binding "parallel beta roll" motif is completely conserved. The N-terminal proteolytic domain shows the typical "metzincin" fold. The active sites of the two enzymes are slightly different, Tyr216 is a Zn ligand in the Serratia metallo protease. The loops 70-77 and 122-132, which encompass the active site cleft, differ due to insertions and deletions so that the Serratia metallo protease seems to have a more open site than the alkaline protease.
Related Citations:
Three-Dimensional Structure of the Alkaline Protease from Ps. Aeruginosa: A Two-Domain Protein with a Calcium Binding Parallel Beta Roll Motif Baumann, U., Wu, S., Flaherty, K.M., Mckay, D.B. (1993) EMBO J 12: 3357
Organizational Affiliation:
Abteilung für Strukturforschung, Max-Planck-Institut für Biochemie, Martinsried, Germany.
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