National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM122467
米国
引用
ジャーナル: Protein Expr Purif / 年: 2022 タイトル: Reconstitution of the full transmembrane cadherin-catenin complex. 著者: Allison Maker / Barry M Gumbiner / 要旨: The dynamic regulation of epithelial adherens junctions relies on all components of the E-cadherin-catenin complex. Previously, the complexes have been partially reconstituted and composed only of α- ...The dynamic regulation of epithelial adherens junctions relies on all components of the E-cadherin-catenin complex. Previously, the complexes have been partially reconstituted and composed only of α-catenin, β-catenin, and the E-cadherin cytoplasmic domain. However, p120-catenin and the full-length E-cadherin including the extracellular, transmembrane, and intra-cellular domains are vital to the understanding of the relationship between extracellular adhesion and intracellular signaling. Here, we reconstitute the complete and full-length cadherin-catenin complex, including full-length E-cadherin, α-catenin, β-catenin, and p120-catenin, into nanodiscs. We are able to observe the cadherin in nanodiscs by cryo-EM. We also reconstitute α-catenin, β-catenin, and p120-catenin with the E-cadherin cytoplasmic tail alone in order to analyze the affinities of their binding interactions. We find that p120-catenin does not associate strongly with α- or β-catenin and binds much more transiently to the cadherin cytoplasmic tail than does β-catenin. Overall, this work creates many new possibilities for biochemical studies understanding transmembrane signaling of cadherins and the role of p120-catenin in adhesion activation.
全体 : Complex of human E-cadherin monomer with activating Fab 19A11
全体
名称: Complex of human E-cadherin monomer with activating Fab 19A11
要素
複合体: Complex of human E-cadherin monomer with activating Fab 19A11
複合体: Full length E-cadherin with Twin-Strep tag
タンパク質・ペプチド: E-cadherin (CDH1) with C-terminal Twin-Strep tag
複合体: Activating antibody fragment 19A11
タンパク質・ペプチド: Activating antibody fragment 19A11 heavy chain
タンパク質・ペプチド: Activating antibody fragment 19A11 light chain
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超分子 #1: Complex of human E-cadherin monomer with activating Fab 19A11
超分子
名称: Complex of human E-cadherin monomer with activating Fab 19A11 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: Cadherin was embedded in MSP1D1 nanodisc not visible in final map. Alpha-catenin, beta-catenin, p120-catenin also present in EM sample, but were not visible in any images.
分子量
理論値: 130 KDa
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超分子 #2: Full length E-cadherin with Twin-Strep tag
超分子
名称: Full length E-cadherin with Twin-Strep tag / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1
由来(天然)
生物種: Homo sapiens (ヒト)
分子量
理論値: 80 KDa
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超分子 #3: Activating antibody fragment 19A11
超分子
名称: Activating antibody fragment 19A11 / タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #2-#3 / 詳細: His tagged recombinant Fab fragment
由来(天然)
生物種: Mus musculus (ハツカネズミ)
分子量
理論値: 50 KDa
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分子 #1: E-cadherin (CDH1) with C-terminal Twin-Strep tag
分子
名称: E-cadherin (CDH1) with C-terminal Twin-Strep tag / タイプ: protein_or_peptide / ID: 1 / 光学異性体: LEVO
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV
詳細
Alpha-catenin, beta-catenin, p120 catenin also present at sample prep stage. These were not visible on grid. Nanodiscs averaged out in final reconstruction.
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 40.0 e/Å2