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首页> 外文期刊>Toxicon: An International Journal Devoted to the Exchange of Knowledge on the Poisons Derived from Animals, Plants and Microorganisms >Functional Functional analysis of four single (RGDW(L)under-bar, RGDW(M)under-bar, RGDW(P)under-bar, RGD(M)under-barN) and two double (RGD(N)under-bar, RGD(MP)under-bar) mutants: The importance of methionine (M) in the functional potency of recombinant mojastin (r-Moj)
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Functional Functional analysis of four single (RGDW(L)under-bar, RGDW(M)under-bar, RGDW(P)under-bar, RGD(M)under-barN) and two double (RGD(N)under-bar, RGD(MP)under-bar) mutants: The importance of methionine (M) in the functional potency of recombinant mojastin (r-Moj)

机译:对四个单(RGDW(L)底杆,RGDW(M)底杆,RGDW(P)底杆,RGD(M)底杆N)和两个双(RGD(N)底杆)进行功能分析,RGD(MP)下栏)突变体:蛋氨酸(M)在重组莫哈斯汀(r-Moj)功能效能中的重要性

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摘要

We have demonstrated in previous studies that a single amino acid change can alter the activity of the recombinant disintegrin r-Moj. In this study, four r-Moj recombinants containing single mutations (rMoj-W (L) under bar, r-Moj-W (M) under bar, r-Moj-W (P) under bar, r-Moj-(M) under barN) and two containing double mutations (r-Moj-(MP) under bar and r-Moj-(NM) under bar) at the binding loop were produced, purified, and tested. All r-Moj-W_, r-Moj-M_, and r-Moj-NM mutant peptides inhibited platelet aggregation at higher potency than r-Moj-D_ mutants. Five of the seven r-Moj peptides inhibited angiogenesis at different levels. Two of the mutant peptides with a methionine at the second position carboxyl of the RGD (r-Moj-W (M) under bar and r-Moj-N (M) under bar) were the strongest angiogenesis inhibitors, with r-Moj-WM being the most potent. Recombinant r-Moj-MP and r-Moj-WN failed to inhibit angiogenesis. Only the r-Moj-MP mutant peptide induced apoptosis of SK -Mel -28 cells significantly (p = 0.001). This was confirmed by chromatin condensation. Proliferation of SK -Mel -28 cells was inhibited at high levels (>70%) by all r-Moj mutant peptides. Recombinant r-Moj-MN and r-Moj-WN failed to inhibit cell migration significantly (p > 0.5). Recombinant r-Moj-NM was the strongest cell migration inhibitor (98% +/- 0.69), followed by r-Moj-MP (80% +/- 2.87), and r-Moj-WM (61.8% +/- 5.45). The lowest inhibitor was r-Moj-WL (50% +/- 12.16). Our functional data suggest that the most potent r-Moj disintegrins contain a methionine in the first or the second position carboxyl to the RGD. (C) 2016 Elsevier Ltd. All rights reserved.
机译:在先前的研究中我们已经证明,单个氨基酸变化可以改变重组双整合蛋白r-Moj的活性。在这项研究中,四个r-Moj重组体包含单个突变(bar下的rMoj-W(L),bar下的r-Moj-W(M),bar下的r-Moj-W(P),r-Moj-(M ),在barN)和结合环处包含两个包含双突变(bar在r-Moj-(MP)和bar在r-Moj-(NM))的情况下进行了纯化和测试。所有r-Moj-W_,r-Moj-M_和r-Moj-NM突变体肽都比r-Moj-D_突变体以更高的效价抑制血小板凝集。七个r-Moj肽中的五个在不同水平上抑制血管生成。在RGD的第二个羧基位置有甲硫氨酸的两个突变肽(bar下方的r-Moj-W(M)和bar下方的r-Moj-N(M))是最强的血管生成抑制剂,其中r-Moj- WM是最有效的。重组r-Moj-MP和r-Moj-WN无法抑制血管生成。仅r-Moj-MP突变体肽显着诱导SK -Mel -28细胞凋亡(p = 0.001)。染色质浓缩证实了这一点。所有r-Moj突变肽均以高水平(> 70%)抑制SK -Mel -28细胞的增殖。重组r-Moj-MN和r-Moj-WN无法显着抑制细胞迁移(p> 0.5)。重组r-Moj-NM是最强的细胞迁移抑制剂(98%+/- 0.69),其次是r-Moj-MP(80%+/- 2.87)和r-Moj-WM(61.8%+/- 5.45) )。最低的抑制剂是r-Moj-WL(50%+/- 12.16)。我们的功能数据表明,最有效的r-Moj Disintegrins在RGD的第一个或第二个羧基上含有蛋氨酸。 (C)2016 Elsevier Ltd.保留所有权利。

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