Dissociation and subunit rearrangement of membrane-bound human C-reactive proteins

作者：Wang HW; Sui SF^*

来源：Biochemical and Biophysical Research Communications, 2001, 288(1): 75-79.

DOI：10.1006/bbrc.2001.5733

• human C-reactive protein
• two-dimensional crystallization
• electron microscopy
• pentamer
• dissociation

As one of the most important acute-phase reactants in human serum, C-reactive protein plays its physiological roles mainly on membranes. Here we show that the human C-reactive protein is two-dimensionally crystallized upon specific adsorption on the phosphorylcholine ligand containing membranes by monolayer approach. The 2.0-nm resolution projection structure of the two-dimensional crystals analyzed by electron microscopy and image reconstruction reveals open-ring-like pentamers in the crystals. The electron microscope graphs also show that the dissociated pentamers with open-ring-like structure occur in a closed packing region (not two-dimensionally crystallized). These results indicate a membrane-induced dissociation and rearrangement of hCRP, which may relate to the variety of hCRP';s physiological functions.

• 出版日期2001-10-19
• 单位清华大学