8URA
Crystal structure of Corynebacterium ulcerans endo-beta-N-acetylglucosaminidase catalytically inactive CU43 D187A-E189A at 2.6 A resolution (space group P21)
Summary for 8URA
| Entry DOI | 10.2210/pdb8ura/pdb |
| Descriptor | Corynebacterial protease CP40 (2 entities in total) |
| Functional Keywords | endoglycosidase, gh18 family, endo-beta-n-acetylglucosaminidase, single-domain igg-specific, hydrolase |
| Biological source | Corynebacterium ulcerans |
| Total number of polymer chains | 2 |
| Total formula weight | 92214.62 |
| Authors | Sastre, D.E.,Sultana, N.,Sundberg, E.J. (deposition date: 2023-10-25, release date: 2024-10-23, Last modification date: 2024-12-11) |
| Primary citation | Sastre, D.E.,Bournazos, S.,Du, J.,Boder, E.J.,Edgar, J.E.,Azzam, T.,Sultana, N.,Huliciak, M.,Flowers, M.,Yoza, L.,Xu, T.,Chernova, T.A.,Ravetch, J.V.,Sundberg, E.J. Potent efficacy of an IgG-specific endoglycosidase against IgG-mediated pathologies. Cell, 187:6994-, 2024 Cited by PubMed Abstract: Endo-β-N-acetylglucosaminidases (ENGases) that specifically hydrolyze the Asn297-linked glycan on immunoglobulin G (IgG) antibodies, the major molecular determinant of fragment crystallizable (Fc) γ receptor (FcγR) binding, are exceedingly rare. All previously characterized IgG-specific ENGases are multi-domain proteins secreted as an immune evasion strategy by Streptococcus pyogenes strains. Here, using in silico analysis and mass spectrometry techniques, we identified a family of single-domain ENGases secreted by pathogenic corynebacterial species that exhibit strict specificity for IgG antibodies. By X-ray crystallographic and surface plasmon resonance analyses, we found that the most catalytically efficient IgG-specific ENGase family member recognizes both protein and glycan components of IgG. Employing in vivo models, we demonstrated the remarkable efficacy of this IgG-specific ENGase in mitigating numerous pathologies that rely on FcγR-mediated effector functions, including T and B lymphocyte depletion, autoimmune hemolytic anemia, and antibody-dependent enhancement of dengue disease, revealing its potential for treating and/or preventing a wide range of IgG-mediated diseases in humans. PubMed: 39437779DOI: 10.1016/j.cell.2024.09.038 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.59 Å) |
Structure validation
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