화학공학소재연구정보센터
Applied Microbiology and Biotechnology, Vol.105, No.7, 2759-2773, 2021
Searching for conditions of protein self-assembly by protein crystallization screening method
The self-assembly of biomacromolecules is an extremely important process. It is potentially useful in the fields of life science and materials science. To carry out the study on the self-assembly of proteins, it is necessary to find out the suitable self-assembly conditions, which have always been a challenging task in practice. Inspired by the screening technique in the field of protein crystallization, we proposed using the same screening technique for seeking suitable protein self-assembly conditions. Based on this consideration, we selected 5 proteins (beta-lactoglobulin, hemoglobin, pepsin, lysozyme, alpha-chymotrypsinogen (II) A) together with 5 screening kits (Index(TM), BML, Morpheus, JCSG, PEG/Ion Screen(TM)) to investigate the performance of these crystallization screening techniques in order to discover new optimized conditions of protein self-assembly. The screens were all kept at 293 K for certain days, and were analyzed using optical microscope, scanning electron microscope, transmission electron microscope, atomic force microscope, fluorescence microscope, and atomic absorption spectroscope. The results demonstrated that the method of protein crystallization screening can be successfully applied in the screening of self-assembly conditions. This method is fast, high throughput, and easily implemented in an automated system, with a low protein consumption feature. These results suggested that such strategy can be applied to finding new conditions or forms in routine research of protein self-assembly. Graphical abstract