7P32 image
Entry Detail
PDB ID:
7P32
Keywords:
Title:
Crystal structure of human lysosomal acid-alpha-glucosidase, GAA, in complex with cyclosulfamidate 6
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2021-07-06
Release Date:
2022-07-13
Method Details:
Experimental Method:
Resolution:
1.82 Å
R-Value Free:
0.17
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Lysosomal alpha-glucosidase
Chain IDs:A (auth: AAA)
Chain Length:872
Number of Molecules:1
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CSO A CYS modified residue
Primary Citation
1,6- epi-Cyclophellitol Cyclosulfamidate Is a Bona Fide Lysosomal alpha-Glucosidase Stabilizer for the Treatment of Pompe Disease.
J.Am.Chem.Soc. 144 14819 14827 (2022)
PMID: 35917590 DOI: 10.1021/jacs.2c05666

Abstact

α-Glucosidase inhibitors are potential therapeutics for the treatment of diabetes, viral infections, and Pompe disease. Herein, we report a 1,6-epi-cyclophellitol cyclosulfamidate as a new class of reversible α-glucosidase inhibitors that displays enzyme inhibitory activity by virtue of its conformational mimicry of the substrate when bound in the Michaelis complex. The α-d-glc-configured cyclophellitol cyclosulfamidate 4 binds in a competitive manner the human lysosomal acid α-glucosidase (GAA), ER α-glucosidases, and, at higher concentrations, intestinal α-glucosidases, displaying an excellent selectivity over the human β-glucosidases GBA and GBA2 and glucosylceramide synthase (GCS). Cyclosulfamidate 4 stabilizes recombinant human GAA (rhGAA, alglucosidase alfa, Myozyme) in cell medium and plasma and facilitates enzyme trafficking to lysosomes. It stabilizes rhGAA more effectively than existing small-molecule chaperones and does so in vitro, in cellulo, and in vivo in zebrafish, thus representing a promising therapeutic alternative to Miglustat for Pompe disease.

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Primary Citation of related structures