ISDA

Deposition Date 2014-07-02

Release Date 2014-08-06

Last Version Date 2024-11-06

Entry Detail

PDB ID:

4TX6

Keywords:

HYDROLASE

Title:

AfChiA1 in complex with compound 1

Biological Source:

Source Organism:

Aspergillus fumigatus A1163 (Taxon ID: 451804)

Host Organism:

Komagataella pastoris

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.18

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

I 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Class III chitinase ChiA1
Gene (Uniprot):AFUB_052270
Chain IDs:A, B
Chain Length:310
Number of Molecules:2
Biological Source:Aspergillus fumigatus A1163

UniProt ID:B0Y2Y2 Pfam ID:PF00704

Primary Citation

Screening-based discovery of Aspergillus fumigatus plant-type chitinase inhibitors

Lockhart, D.E, Schuettelkopf, A.W, Blair, D.E, van Aalten, D.M.F.Show

FEBS Lett 588 3282 ? (2014)

PMID: 25063338 DOI: 10.1016/j.febslet.2014.07.015

Abstact

A limited therapeutic arsenal against increasing clinical disease due to Aspergillus spp. necessitates urgent characterisation of new antifungal targets. Here we describe the discovery of novel, low micromolar chemical inhibitors of Aspergillus fumigatus family 18 plant-type chitinase A1 (AfChiA1) by high-throughput screening (HTS). Analysis of the binding mode by X-ray crystallography confirmed competitive inhibition and kinetic studies revealed two compounds with selectivity towards fungal plant-type chitinases. These inhibitors provide new chemical tools to probe the effects of chitinase inhibition on A. fumigatus growth and virulence, presenting attractive starting points for the development of further potent drug-like molecules.

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Primary Citation of related structures