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来自Leishmania donovani的T复合蛋白-1的Epsilon子单元:一个四重体的Chaperonin
Apeksha Anand1, Gunjan Gautam2, Shailendra Yadav1
1Division of Biochemistry and Structural Biology, CSIR- Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Gaziabaad 201002, India.
研究人员对Leishmania donovani TCP1ε亚单元进行了表征,揭示了其二度和四度形式具有对寄生虫生存至关重要的Chaperonin活性. 这一发现增强了对Leishmania中蛋白质折叠的理解.
科学领域:
- 分子生物学分子生物学
- 寄生虫学的寄生虫学
- 生物化学 生物化学
背景情况:
- T复合蛋白-1环复合体 (TRiC/CCT) 对于真核生物中的蛋白质折叠至关重要,它结合了约10%的新聚.
- 在Leishmania中,只有TRiC的LdTCP1γ子单元得到了良好的特征,突出了知识差距.
- 了解其他TRiC子单元对于阐明它们在Leishmania病原性中的作用至关重要.
研究的目的:
- 来自Leishmania donovani的TCP1ε亚单元 (LdTCP1ε) 的克隆,表达和生物化学特征.
- 为了研究寡合体状态,沙佩罗宁活性,表达模式和LdTCP1ε的局部化.
- 提供关于莱什马尼亚TRiC子单位的结构多样性和功能角色的见解.
主要方法:
- 对LdTCP1ε亚单元的克隆和表达.
- 生物化学表征包括原生PAGE,ATPase试验和光酶重新折叠试验.
- 在不同生长阶段对LdTCP1ε表达的定量分析及其亚细胞局部化.
主要成果:
- LdTCP1ε与LdTCP1γ显著的主要结构差异以及与LdTCP1 zeta.
- 重组LdTCP1ε (rLdTCP1ε) 形成具有沙佩罗宁活性的二次 (132 kDa) 和四次 (240 kDa) 组合.
- LdTCP1ε表达在后期的日志和静止阶段增加,主要以囊泡局部化为主.
结论:
- 这项研究确定和描述了Leishmania donovani.的LdTCP1ε亚单元.
- LdTCP1ε存在于功能活跃的二度和四度形式,表现出ATPase和蛋白质重新折叠的能力.
- 这些发现揭示了Leishmania中一个分离但功能性的TCP1ε子单元,有助于寄生虫的生存和潜在的致病性.
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