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J Biol Chem, Vol. 274, Issue 9, 5573-5580, February 26, 1999
From the The mosquito-borne dengue viruses are
widespread human pathogens causing dengue fever, dengue hemorrhagic
fever, and dengue shock syndrome, placing 40% of the world's
population at risk with no effective treatment. The viral genome is a
positive strand RNA that encodes a single polyprotein precursor.
Processing of the polyprotein precursor into mature proteins is carried
out by the host signal peptidase and by NS3 serine protease, which requires NS2B as a cofactor. We report here the crystal structure of
the NS3 serine protease domain at 2.1 Å resolution. This structure of
the protease combined with modeling of peptide substrates into the
active site suggests identities of residues involved in substrate recognition as well as providing a structural basis for several mutational effects on enzyme activity. This structure will be useful
for development of specific inhibitors as therapeutics against dengue
and other flaviviral proteases.
Dengue Virus NS3 Serine Protease
CRYSTAL STRUCTURE AND INSIGHTS INTO INTERACTION OF THE ACTIVE
SITE WITH SUBSTRATES BY MOLECULAR MODELING AND STRUCTURAL ANALYSIS
OF MUTATIONAL EFFECTS
,
Fels Institute, Temple University,
Philadelphia, Pennsylvania 19140 and the ¶ Department of
Biochemistry and Molecular Biology, University of Kansas Medical
Center, Kansas City, Kansas 66160
Copyright © 1999 by The American Society for Biochemistry and Molecular Biology, Inc.
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