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Protein Science, Vol 5, Issue 4 789-791, Copyright © 1996 by Cold Spring Harbor Laboratory Press
FOR THE RECORD |
D. BROMME and M. E. MCGRATH
Khepri Pharmaceuticals, Inc., South San Francisco, California 94080
We have expressed active human cathepsin S to 60 mg/L in Sf9 cells using a baculovirus system. Production of milligram quantities has facilitated crystallographic studies to determine the structure of this enzyme, which has unique properties among lysosomal cysteine proteinases. Recombinant, irreversibly inhibited cathepsin S was crystallized from ammonium phosphate at 17{deg}C. The crystals diffract to at least 2.3 A, and belong to the orthorhombic crystal system with a primitive lattice. Approximate cell dimensions are: a = 37.7 A, b = 73.9 A, and c = 106.7 A. There is most likely one molecule per asymmetric unit.
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