Crystal structure of colicin E3 immunity protein: an inhibitor of a ribosome-inactivating RNase.
Li, C., Zhao, D., Djebli, A., Shoham, M.(1999) Structure 7: 1365-1372
- PubMed: 10574790 
- DOI: https://doi.org/10.1016/s0969-2126(00)80026-x
- Primary Citation of Related Structures:  
3EIP - PubMed Abstract: 
Colicins are antibiotic-like proteins of Escherichia coli that kill related strains. Colicin E3 acts as an RNase that specifically cleaves 16S rRNA, thereby inactivating the ribosomes in the infected cell. The producing organism is protected against colicin E3 by a specific inhibitor, the immunity protein Im3, which forms a tight 1:1 complex with colicin E3 and renders it inactive. Crystallographic studies on colicin E3 and Im3 have been undertaken to unravel the structural basis for the ribonucleolytic activity and its inhibition.
Organizational Affiliation: 
Department of Biochemistry, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4935, USA.