Japan Agency for Medical Research and Development (AMED)
jp22ama121006
日本
Japan Science and Technology
JPMJMI20G5
日本
引用
ジャーナル: Bioconjug Chem / 年: 2023 タイトル: Unnaturally Distorted Hexagonal Protein Ring Alternatingly Reorganized from Two Distinct Chemically Modified Proteins. 著者: Tomoki Himiyama / Tasuku Hamaguchi / Koji Yonekura / Tsutomu Nakamura / 要旨: In this study, we constructed a semiartificial protein assembly of alternating ring type, which was modified from the natural assembly state via incorporation of a synthetic component at the protein ...In this study, we constructed a semiartificial protein assembly of alternating ring type, which was modified from the natural assembly state via incorporation of a synthetic component at the protein interface. For the redesign of a natural protein assembly, a scrap-and-build approach employing chemical modification was used. Two different protein dimer units were designed based on peroxiredoxin from , which originally forms a dodecameric hexagonal ring with six homodimers. The two dimeric mutants were reorganized into a ring by reconstructing the protein-protein interactions via synthetic naphthalene moieties introduced by chemical modification. Cryo-electron microscopy revealed the formation of a uniquely shaped dodecameric hexagonal protein ring with broken symmetry, distorted from the regular hexagon of the wild-type protein. The artificially installed naphthalene moieties were arranged at the interfaces of dimer units, forming two distinct protein-protein interactions, one of which is highly unnatural. This study deciphered the potential of the chemical modification technique that constructs semiartificial protein structures and assembly hardly accessible by conventional amino acid mutations.
解像度: 2.35→48.367 Å / Cor.coef. Fo:Fc: 0.951 / Cor.coef. Fo:Fc free: 0.927 / SU B: 9.275 / SU ML: 0.209 / 交差検証法: THROUGHOUT / ESU R: 0.429 / ESU R Free: 0.263 / 詳細: Hydrogens have been added in their riding positions
Rfactor
反射数
%反射
Rfree
0.2529
1021
5.201 %
Rwork
0.2049
18610
-
all
0.207
-
-
obs
-
19631
99.797 %
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: BABINET MODEL PLUS MASK