The crystal structure of the human DNA repair endonuclease HAP1 suggests the recognition of extra-helical deoxyribose at DNA abasic sites.
Gorman, M.A., Morera, S., Rothwell, D.G., de La Fortelle, E., Mol, C.D., Tainer, J.A., Hickson, I.D., Freemont, P.S.(1997) EMBO J 16: 6548-6558
- PubMed: 9351835 
- DOI: 10.1093/emboj/16.21.6548
- Primary Citation of Related Structures:  
1BIX - PubMed Abstract: 
The structure of the major human apurinic/ apyrimidinic endonuclease (HAP1) has been solved at 2.2 A resolution. The enzyme consists of two symmetrically related domains of similar topology and has significant structural similarity to both bovine DNase I and its Escherichia coli homologue exonuclease III (EXOIII) ...