期刊
CHEMBIOCHEM
卷 23, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.202100504
关键词
bioinformatics; peptides; peptide libraries; phage display; protein-protein interactions
资金
- NIH [AI32956, T32-GM008280]
Peptides that bind and disrupt protein-protein interaction interfaces can be identified through systematic peptide library construction, affinity selection, and deep sequencing.
Disrupting protein-protein interactions is difficult due to the large and flat interaction surfaces of the binding partners. The BLIP and BLIP-II proteins are unrelated in sequence and structure and yet each potently inhibit beta-lactamases. High-throughput oligonucleotide synthesis was used to construct a 12,470-member library containing overlapping linear and cyclic peptides ranging in size from 6 to 21 amino acids that scan through the sequences of BLIP and BLIP-II. Phage display affinity selections and deep sequencing revealed that, despite the differences in interaction surfaces with beta-lactamases, rapid enrichment of consensus peptide regions originating from both BLIP and BLIP-II contact residues in the binding interface occurred. BLIP and BLIP-II peptides that were enriched by affinity selection were shown to bind beta-lactamases and disrupt the BLIP/beta-lactamase interaction. The results suggest that peptides that bind at and disrupt PPI interfaces can be identified through systematic peptide library construction, affinity selection, and deep sequencing.
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