设计一种强制域互换的诺维林-N二元体,具有增强的抗HIV活性
Brendan S Kelley1, Leng Chee Chang, Carole A Bewley
1Laboratory of Bioorganic Chemistry, NIDDK, National Institutes of Health, Bethesda, MD 20892-0820, USA.
Journal of the American Chemical Society
|March 28, 2002
概括
一种新型的诺维林-N二聚体,为稳定性而设计,显示出增强的抗HIV活性. 这种蛋白质为艾滋病毒治疗药物提供了一个有前途的新途径,具有更好的结合和生产效率.
科学领域:
- 生物化学 生物化学
- 病毒学 病毒学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 诺维林-N 是一种来自菌的抗HIV蛋白.
- 它可以通过域互换形成交织的二元体,在低pH下稳定.
- 这种二维形式具有治疗应用的潜力.
研究的目的:
- 为了设计一个稳定的,强制域互换的诺维林-N.N.二元体.
- 为了评估这种工程二次体的抗艾滋病毒活性.
- 为了评估蛋白质的稳定性和净化效率.
主要方法:
- 位点定向的突变发生,以删除链链接器中的氨基酸.
- 由此产生的义务域互换二次数的表征.
- 使用HIV-1包膜介导的细胞融合抑制来测定抗HIV活性.
- 在大肠杆菌表达和通过染色学净化.
主要成果:
- 一个强制域互换的诺维林-N二元体已成功构造.
- 设计的二次体在广泛的pH范围内是稳定的.
- 与抑制HIV-1细胞融合的单体 (32nM) 相比,二聚体的IC50 (9nM) 减少了3.5倍.
- 这种蛋白质在E. coli的单一染色学步骤中获得了>98%的纯度.
结论:
- 工程化义务域交换的诺维林-N二聚体是一种稳定,四价值的碳水化合物结合蛋白.
- 这种二元体显示出显著增强的抗HIV活性.
- 蛋白质的稳定性和高效的净化使其成为进一步治疗开发的有希望的候选人.
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