两种来自Commelina communis L L的葡萄糖蛋白的隔离,结构特征和抗补活性
Xiaojiang Wang1, Donglin Zeng1, Yan Lu1
1Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhang Heng Road, Shanghai, 201203, China.
International journal of biological macromolecules
|September 17, 2025
概括
康梅利纳共生L.含有强大的抗补糖蛋白,CCW-4和CCW-5. CCW-5,特别是其蛋白质成分,显示出显著的抗补剂活性,表明呼吸道感染治疗的潜力.
科学领域:
- 植物化学 植物化学
- 免疫学 免疫学 免疫学
- 传统中国医药 传统中国医药
背景情况:
- 康美林 (Commelinae Herba) 是一种传统的中医药,在治疗感染方面有着悠久的历史.
- 最近的研究表明,C. communis具有抗补活性和各种生物活性化合物.
- 然而,来自该植物的抗补剂糖蛋白仍未得到充分研究.
研究的目的:
- 从Commelina communis中分离和表征抗补糖蛋白.
- 为了评估这些孤立的葡萄糖蛋白的抗补剂活性.
- 阐明这些葡萄糖蛋白与补充成分的结合相互作用.
主要方法:
- 从C. communis水提取物中对CCW-4和CCW-5的宏分子分离和表征.
- 组合分析以确定糖蛋白的性质和糖的联系.
- 使用经典途径进行抗补剂活性测定 (血解抑制度的一半,CH50).
- 表面等离子体共振 (SPR) 分析以量化对C1q和C5.5的结合亲和力.
主要成果:
- 两种酸性甘氨酸蛋白,CCW-4和CCW-5,被成功分离并确定为含有N链 glycans.
- CCW-5显示出强大的抗补充活性 (CH50 = 39.8 μg/mL),明显强于CCW-4 (CH50 = 407.1 μg/mL).
- CCW-5的蛋白质部分表现出更高的强度 (CH50 = 7.5μg/mL).
- 与CCW-4 (KD = 2.36 μM和6.6 μM,分别) 相比,SPR分析显示CCW-5结合的C1q和C5具有更高的亲和力 (KD = 0.29 μM和0.42 μM,分别).
结论:
- 反补充糖蛋白是Commelina communis水提取物中重要的活性成分.
- CCW-5,特别是其蛋白质部分,是经典补充路径的强有力的抑制剂.
- 这些发现表明,有可能开发用于呼吸道感染的基于糖蛋白的治疗方法.
相关概念视频
Antimicrobial Proteins
13.0K
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
13.0K
Complement System
9.8K
The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
9.8K
Conjugated Proteins
27.5K
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
27.5K


