A nucleophile activation dyad in ribonucleases. A combined X-ray crystallographic/ab initio quantum chemical study
Mignon, P., Steyaert, J., Loris, R., Geerlings, P., Loverix, S.(2002) J Biol Chem 277: 36770-36774
- PubMed: 12122018 
- DOI: 10.1074/jbc.M206461200
- Primary Citation of Related Structures:  
1LOV, 1LOW, 1LOY - PubMed Abstract: 
Ribonucleases (RNases) catalyze the cleavage of the phosphodiester bond in RNA up to 10(15)-fold, as compared with the uncatalyzed reaction. High resolution crystal structures of these enzymes in complex with 3'-mononucleotide substrates demonstrate the accommodation of the nucleophilic 2'-OH group in a binding pocket comprising the catalytic base (glutamate or histidine) and a charged hydrogen bond donor (lysine or histidine) ...