在pKID域的无序αB上的-醇位移堆增加了其对KIX的性和亲和力
Carson B Cohen1, Andrew J Andrews2, Rongsheng E Wang1
1Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA 19122, USA.
概括
为像pKID这样的无序蛋白质开发高亲和度连接体是困难的. 这项研究使用了分片来稳定αB螺旋,增强了与其合作伙伴KIX的结合亲和力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 针对内在无序蛋白 (IDP) 进行治疗是具有挑战性的,因为它们缺乏明确的结构.
- pKID (proline-rich kinase相互作用域) 是一种与CREB结合蛋白 (CBP) 的KIX域相互作用的IDP.
研究的目的:
- 为失调的pKID蛋白开发高亲和性联体.
- 通过采用片分离方法,研究螺旋稳定在pKID-KIX相互作用中的作用.
主要方法:
- 利用-二醇位移反应 (FTDR) 分离平台创建一个联体库.
- 来自pKID的αB螺旋体的合成,不同的接合点.
- 评估了与KIX域的合的结合亲和力.
主要成果:
- 在Arg135和Ser142的分离显著增强了螺旋形成和KIX结合亲和力.
- 最高亲和度的,αB-RSpS,可能会在KIX上的MLL部位形成二次接触.
- 缺少保留螺旋侧翼蛋白的合酸 (Pro132和Pro146) 没有与KIX结合.
结论:
- 稳定αB螺旋对于增强pKID与KIX的结合亲和力至关重要.
- 保存的螺旋侧翼プロ林对于αB-与KIX的结合至关重要.
- 这项研究提供了第一个证据,证明了这些prolines在pKID.pKID的αB螺旋体中的作用.
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