6P67

Crystal Structure of a Complex of human IL-7Ralpha with an anti-IL-7Ralpha 2B8 Fab

6P67 の概要

• エントリーDOI: 10.2210/pdb6p67/pdb
• 分子名称: Anti-IL-7R 2B8 Fab heavy chain, anti-IL-7R 2B8 Fab light chain, Interleukin-7 receptor subunit alpha, ... (7 entities in total)
• 機能のキーワード: interleukin-7 receptor extracellular dohmain, antibody 2b8 fab fragment, protein polymer, immune system
• 由来する生物種: Mus musculus (Mouse); 詳細
• タンパク質・核酸の鎖数: 12
• 化学式量合計: 296908.01

構造登録者

Walsh, S.T.R.,Kashi, L.,Kohnhorst, C.L. (登録日: 2019-06-03, 公開日: 2019-09-04, 最終更新日: 2024-10-23)

主引用文献

Hixon, J.A.,Andrews, C.,Kashi, L.,Kohnhorst, C.L.,Senkevitch, E.,Czarra, K.,Barata, J.T.,Li, W.,Schneider, J.P.,Walsh, S.T.R.,Durum, S.K.
New anti-IL-7R alpha monoclonal antibodies show efficacy against T cell acute lymphoblastic leukemia in pre-clinical models.
Leukemia, 34:35-49, 2020

PubMed Abstract: Pediatric T cell acute lymphoblastic leukemia (T-ALL) cells frequently contain mutations in the interleukin-7 (IL-7) receptor pathway or respond to IL-7 itself. To target the IL-7 receptor on T-ALL cells, murine monoclonal antibodies (MAbs) were developed against the human IL-7Rα chain and chimerized with human IgG1 constant regions. Crystal structures demonstrate that the two MAbs bound different IL-7Rα epitopes. The MAbs mediated antibody-dependent cell-mediated cytotoxicity (ADCC) against patient-derived xenograft (PDX) T-ALL cells, which was improved by combining two MAbs. In vivo, the MAbs showed therapeutic efficacy via ADCC-dependent and independent mechanisms in minimal residual and established disease. PDX T-ALL cells that relapsed following a course of chemotherapy displayed elevated IL-7Rα, and MAb treatment is effective against relapsing disease, suggesting the use of anti-IL7Rα MAbs in relapsed T-ALL patients or patients that do not respond to chemotherapy.

PubMed: 31439943
DOI: 10.1038/s41375-019-0531-8

実験手法

X-RAY DIFFRACTION (2.9 Å)