丙氨酸扫描
丙氨酸
胶体金
残留物(化学)
突变
纳米颗粒
溶菌酶
蛋白质工程
生物物理学
突变体
组合化学
材料科学
纳米技术
生物化学
化学
生物
氨基酸
酶
基因
作者
Lei Luo,Yuan-Yuan Liu,Tiange Gao,Xinping Wang,J Chen,Haifang Wang,Yuanfang Liu,Aoneng Cao
标识
DOI:10.1021/acsami.0c05994
摘要
The interaction between nanoparticles and proteins is a central problem in the nano-bio-fields. However, it is still a great challenge to characterize the specific interaction between nanoparticles and proteins in structural details. Using the Goldbodies, the artificial antibodies created by grafting complementary-determining regions (CDRs) of natural antibodies onto gold nanoparticles, as the models, we manage to identify the key residues of the CDR peptides on gold nanoparticles for the specific interactions by alanine scanning mutagenesis. Each and every residue of the CDR peptides on two Goldbodies (which specifically bind with hen egg white lysozyme and epidermal growth factor receptor, respectively) is mutated to alanine one by one, generating a total of 18 single-mutants of the two Goldbodies. Experimental results reveal that the key residues of the CDR peptides for the specific interactions between the two Goldbodies and the corresponding antigens are exactly the same as those in the natural antibodies, thus proving that the correct conformations of the CDRs of natural antibodies have been successfully reconstructed on AuNPs. This is the first residue-resolution structural illustration for the specific interaction between a designed nanoparticle and a protein.
科研通智能强力驱动
Strongly Powered by AbleSci AI