Structure and activity of an active site substitution of ricin A chain.
Day, P.J., Ernst, S.R., Frankel, A.E., Monzingo, A.F., Pascal, J.M., Molina-Svinth, M.C., Robertus, J.D.(1996) Biochemistry 35: 11098-11103
- PubMed: 8780513 
- DOI: 10.1021/bi960880n
- Primary Citation of Related Structures:  
1OBT, 1OBS - PubMed Abstract: 
The A chain of ricin (RTA) is an N-glycosidase which inactivates ribosomes by removing a single adenine base from a conserved region of rRNA. X-ray structures and site-directed mutagenesis revealed that Arg 180 interacts with the target adenine hydrogen ...