Asp34 of PvuII endonuclease is directly involved in DNA minor groove recognition and indirectly involved in catalysis.
Horton, J.R., Nastri, H.G., Riggs, P.D., Cheng, X.(1998) J Mol Biol 284: 1491-1504
- PubMed: 9878366 
- DOI: 10.1006/jmbi.1998.2269
- Primary Citation of Related Structures:  
3PVI - PubMed Abstract: 
The PvuII restriction endonuclease is a homodimer that recognizes and cleaves the DNA sequence 5'-CAGCTG-3' in double-stranded DNA, and the structure of this enzyme has been reported. In the wild-type enzyme, Asp34 interacts with the internal guanine of the recognition sequence on the minor groove side ...