1hkk: Difference between revisions
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==Overview== | ==Overview== | ||
The pseudotrisaccharide allosamidin is a potent family 18 chitinase | The pseudotrisaccharide allosamidin is a potent family 18 chitinase inhibitor with demonstrated biological activity against insects, fungi, and the Plasmodium falciparum life cycle. The synthesis and biological properties of several derivatives have been reported. The structural interactions of allosamidin with several family 18 chitinases have been determined by x-ray crystallography previously. Here, a high resolution structure of chitotriosidase, the human macrophage chitinase, in complex with allosamidin is presented. In addition, complexes of the allosamidin derivatives demethylallosamidin, methylallosamidin, and glucoallosamidin B are described, together with their inhibitory properties. Similar to other chitinases, inhibition of the human chitinase by allosamidin derivatives lacking a methyl group is 10-fold stronger, and smaller effects are observed for the methyl and C3 epimer derivatives. The structures explain the effects on inhibition in terms of altered hydrogen bonding and hydrophobic interactions, together with displaced water molecules. The data reported here represent a first step toward structure-based design of specific allosamidin derivatives. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Aalten, D | [[Category: Aalten, D M.F Van.]] | ||
[[Category: Aerts, J | [[Category: Aerts, J M.F G.]] | ||
[[Category: Boot, R | [[Category: Boot, R G.]] | ||
[[Category: Houston, D | [[Category: Houston, D R.]] | ||
[[Category: Rao, F | [[Category: Rao, F V.]] | ||
[[Category: Sakuda, S.]] | [[Category: Sakuda, S.]] | ||
[[Category: AMI]] | [[Category: AMI]] | ||
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[[Category: hydrolase]] | [[Category: hydrolase]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:02:11 2008'' | ||
Revision as of 14:02, 21 February 2008
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HIGH RESOULTION CRYSTAL STRUCTURE OF HUMAN CHITINASE IN COMPLEX WITH ALLOSAMIDIN
OverviewOverview
The pseudotrisaccharide allosamidin is a potent family 18 chitinase inhibitor with demonstrated biological activity against insects, fungi, and the Plasmodium falciparum life cycle. The synthesis and biological properties of several derivatives have been reported. The structural interactions of allosamidin with several family 18 chitinases have been determined by x-ray crystallography previously. Here, a high resolution structure of chitotriosidase, the human macrophage chitinase, in complex with allosamidin is presented. In addition, complexes of the allosamidin derivatives demethylallosamidin, methylallosamidin, and glucoallosamidin B are described, together with their inhibitory properties. Similar to other chitinases, inhibition of the human chitinase by allosamidin derivatives lacking a methyl group is 10-fold stronger, and smaller effects are observed for the methyl and C3 epimer derivatives. The structures explain the effects on inhibition in terms of altered hydrogen bonding and hydrophobic interactions, together with displaced water molecules. The data reported here represent a first step toward structure-based design of specific allosamidin derivatives.
About this StructureAbout this Structure
1HKK is a Single protein structure of sequence from Homo sapiens with and as ligands. Active as Chitinase, with EC number 3.2.1.14 Known structural/functional Site: . Full crystallographic information is available from OCA.
ReferenceReference
Crystal structures of allosamidin derivatives in complex with human macrophage chitinase., Rao FV, Houston DR, Boot RG, Aerts JM, Sakuda S, van Aalten DM, J Biol Chem. 2003 May 30;278(22):20110-6. Epub 2003 Mar 14. PMID:12639956
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