8A48

Less crystallisable" IgG1 Fc fragment (E382S variant)

8A48 の概要

• エントリーDOI: 10.2210/pdb8a48/pdb
• 分子名称: IgG1 Fc, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose, ... (5 entities in total)
• 機能のキーワード: antibody, igg, fc, fragment crystallisable, immune system
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 53961.53

構造登録者

Sudol, A.S.L.,Tews, I.,Crispin, M. (登録日: 2022-06-10, 公開日: 2022-11-30, 最終更新日: 2024-11-13)

主引用文献

Sudol, A.S.L.,Butler, J.,Ivory, D.P.,Tews, I.,Crispin, M.
Extensive substrate recognition by the streptococcal antibody-degrading enzymes IdeS and EndoS.
Nat Commun, 13:7801-7801, 2022

PubMed Abstract: Enzymatic cleavage of IgG antibodies is a common strategy used by pathogenic bacteria to ablate immune effector function. The Streptococcus pyogenes bacterium secretes the protease IdeS and the glycosidase EndoS, which specifically catalyse cleavage and deglycosylation of human IgG, respectively. IdeS has received clinical approval for kidney transplantation in hypersensitised individuals, while EndoS has found application in engineering antibody glycosylation. We present crystal structures of both enzymes in complex with their IgG1 Fc substrate, which was achieved using Fc engineering to disfavour preferential Fc crystallisation. The IdeS protease displays extensive Fc recognition and encases the antibody hinge. Conversely, the glycan hydrolase domain in EndoS traps the Fc glycan in a "flipped-out" conformation, while additional recognition of the Fc peptide is driven by the so-called carbohydrate binding module. In this work, we reveal the molecular basis of antibody recognition by bacterial enzymes, providing a template for the development of next-generation enzymes.

PubMed: 36528711
DOI: 10.1038/s41467-022-35340-z

実験手法

X-RAY DIFFRACTION (3.044 Å)