5I18

CRYSTAL STRUCTURE OF HUMAN GERMLINE ANTIBODY IGHV1-69/IGKV4-1

「3QOT」から置き換えられました

5I18 の概要

• エントリーDOI: 10.2210/pdb5i18/pdb
• 関連するPDBエントリー: 4KMT 5I15 5I16 5I17 5I19 5I1A 5I1C 5I1D 5I1E 5I1G 5I1H 5I1J 5I1K 5I1L 5i1I
• 分子名称: FAB LIGHT CHAIN, FAB HEAVY CHAIN, GLYCEROL, ... (4 entities in total)
• 機能のキーワード: monoclonal antibody, immune system
• 由来する生物種: Homo sapiens (HUMAN); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 48917.47

構造登録者

Teplyakov, A.,Obmolova, G.,Malia, T.,Luo, J.,Gilliland, G. (登録日: 2016-02-05, 公開日: 2016-02-24, 最終更新日: 2024-10-16)

主引用文献

Teplyakov, A.,Obmolova, G.,Malia, T.J.,Luo, J.,Muzammil, S.,Sweet, R.,Almagro, J.C.,Gilliland, G.L.
Structural diversity in a human antibody germline library.
Mabs, 8:1045-1063, 2016

PubMed Abstract: To support antibody therapeutic development, the crystal structures of a set of 16 germline variants composed of 4 different kappa light chains paired with 4 different heavy chains have been determined. All four heavy chains of the antigen-binding fragments (Fabs) have the same complementarity-determining region (CDR) H3 that was reported in an earlier Fab structure. The structure analyses include comparisons of the overall structures, canonical structures of the CDRs and the VH:VL packing interactions. The CDR conformations for the most part are tightly clustered, especially for the ones with shorter lengths. The longer CDRs with tandem glycines or serines have more conformational diversity than the others. CDR H3, despite having the same amino acid sequence, exhibits the largest conformational diversity. About half of the structures have CDR H3 conformations similar to that of the parent; the others diverge significantly. One conclusion is that the CDR H3 conformations are influenced by both their amino acid sequence and their structural environment determined by the heavy and light chain pairing. The stem regions of 14 of the variant pairs are in the 'kinked' conformation, and only 2 are in the extended conformation. The packing of the VH and VL domains is consistent with our knowledge of antibody structure, and the tilt angles between these domains cover a range of 11 degrees. Two of 16 structures showed particularly large variations in the tilt angles when compared with the other pairings. The structures and their analyses provide a rich foundation for future antibody modeling and engineering efforts.

PubMed: 27210805
DOI: 10.1080/19420862.2016.1190060

実験手法

X-RAY DIFFRACTION (1.92 Å)