+検索条件
-Structure paper
タイトル | Antibody discovery identifies regulatory mechanisms of protein arginine deiminase 4. |
---|---|
ジャーナル・号・ページ | Nat Chem Biol, Vol. 20, Issue 6, Page 742-750, Year 2024 |
掲載日 | 2024年2月2日 |
著者 | Xin Zhou / Sophie Kong / Allison Maker / Soumya G Remesh / Kevin K Leung / Kliment A Verba / James A Wells / |
PubMed 要旨 | Unlocking the potential of protein arginine deiminase 4 (PAD4) as a drug target for rheumatoid arthritis requires a deeper understanding of its regulation. In this study, we use unbiased antibody ...Unlocking the potential of protein arginine deiminase 4 (PAD4) as a drug target for rheumatoid arthritis requires a deeper understanding of its regulation. In this study, we use unbiased antibody selections to identify functional antibodies capable of either activating or inhibiting PAD4 activity. Through cryogenic-electron microscopy, we characterized the structures of these antibodies in complex with PAD4 and revealed insights into their mechanisms of action. Rather than steric occlusion of the substrate-binding catalytic pocket, the antibodies modulate PAD4 activity through interactions with allosteric binding sites adjacent to the catalytic pocket. These binding events lead to either alteration of the active site conformation or the enzyme oligomeric state, resulting in modulation of PAD4 activity. Our study uses antibody engineering to reveal new mechanisms for enzyme regulation and highlights the potential of using PAD4 agonist and antagonist antibodies for studying PAD4-dependency in disease models and future therapeutic development. |
リンク | Nat Chem Biol / PubMed:38308046 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.3 - 3.5 Å |
構造データ | EMDB-40589, PDB-8smk: EMDB-40590, PDB-8sml: |
化合物 | ChemComp-CA: |
由来 |
|
キーワード | IMMUNE SYSTEM / complex / enzyme / inflammation / calcium binding / HYDROLASE/IMMUNE SYSTEM / deiminase / arginine / Fab / HYDROLASE-IMMUNE SYSTEM complex |