1o6i
From Proteopedia
CHITINASE B FROM SERRATIA MARCESCENS COMPLEXED WITH THE CATALYTIC INTERMEDIATE MIMIC CYCLIC DIPEPTIDE CI4.
Overview
Family 18 chitinases are attractive targets for the development of new inhibitors with chemotherapeutic potential against fungi, insects and protozoan/nematodal parasites. Although several inhibitors have been identified, these are based on complex chemistry, which hampers iterative structure-based optimization. Here we report the details of chitinase inhibition by the natural product peptide CI-4 [ cyclo -(L-Arg-D-Pro)], which possesses activity against the human pathogenic fungus Candida albicans, and describe a 1.7 A (0.17 nm) crystal structure of CI-4 in complex with the enzyme. The structure reveals that the cyclic dipeptide inhibits chitinases by structurally mimicking a reaction intermediate, and could, on the basis of its accessible chemistry, be a candidate for further optimization.
About this Structure
1O6I is a Single protein structure of sequence from Serratia marcescens. Full crystallographic information is available from OCA.
Reference
The cyclic dipeptide CI-4 [cyclo-(l-Arg-d-Pro)] inhibits family 18 chitinases by structural mimicry of a reaction intermediate., Houston DR, Eggleston I, Synstad B, Eijsink VG, van Aalten DM, Biochem J. 2002 Nov 15;368(Pt 1):23-7. PMID:12323074 Page seeded by OCA on Sat May 3 03:26:36 2008
