ISDA

Deposition Date 2022-04-12

Release Date 2022-04-20

Last Version Date 2024-11-13

Entry Detail

PDB ID:

7ZKC

Keywords:

TRANSFERASE

Title:

Catalytic domain of UDP-Glucose Glycoprotein Glucosyltransferase from Chaetomium thermophilum (apo form)

Biological Source:

Source Organism:

Chaetomium thermophilum (Taxon ID: 209285)

Host Organism:

Homo sapiens

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.77 Å

R-Value Free:

0.22

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

H 3

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:UDP-glucose-glycoprotein glucosyltransferase-like protein
Gene (Uniprot):CTHT_0048990
Chain IDs:A
Chain Length:299
Number of Molecules:1
Biological Source:Chaetomium thermophilum

UniProt ID:G0SB58 Pfam ID:PF18404

Ligand Molecules

Primary Citation

A quinolin-8-ol sub-millimolar inhibitor of UGGT, the ER glycoprotein folding quality control checkpoint.

Guay, K.P, Ibba, R, Kiappes, J.L, Vasiljevic, S, Boni, F, De Benedictis, M, Zeni, I, Le Cornu, J.D, Hensen, M, Chandran, A.V, Kantsadi, A.L, Caputo, A.T, Blanco Capurro, J.I, Bayo, Y, Hill, J.C, Hudson, K, Lia, A, Brun, J, Withers, S.G, Marti, M, Biasini, E, Santino, A, De Rosa, M, Milani, M, Modenutti, C.P, Hebert, D.N, Zitzmann, N, Roversi, P.Show

Iscience 26 107919 107919 (2023)

PMID: 37822503 DOI: 10.1016/j.isci.2023.107919

Abstact

Misfolded glycoprotein recognition and endoplasmic reticulum (ER) retention are mediated by the ER glycoprotein folding quality control (ERQC) checkpoint enzyme, UDP-glucose glycoprotein glucosyltransferase (UGGT). UGGT modulation is a promising strategy for broad-spectrum antivirals, rescue-of-secretion therapy in rare disease caused by responsive mutations in glycoprotein genes, and many cancers, but to date no selective UGGT inhibitors are known. The small molecule 5-[(morpholin-4-yl)methyl]quinolin-8-ol (5M-8OH-Q) binds a CtUGGTGT24 "WY" conserved surface motif conserved across UGGTs but not present in other GT24 family glycosyltransferases. 5M-8OH-Q has a 47 μM binding affinity for CtUGGTGT24in vitro as measured by ligand-enhanced fluorescence. In cellula, 5M-8OH-Q inhibits both human UGGT isoforms at concentrations higher than 750 μM. 5M-8OH-Q binding to CtUGGTGT24 appears to be mutually exclusive to M5-9 glycan binding in an in vitro competition experiment. A medicinal program based on 5M-8OH-Q will yield the next generation of UGGT inhibitors.

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Primary Citation of related structures