Tryptophan 7-halogenase (PrnA) structure suggests a mechanism for regioselective chlorination.
Dong, C., Flecks, S., Unversucht, S., Haupt, C., van Pee, K.H., Naismith, J.H.(2005) Science 309: 2216-2219
- PubMed: 16195462 
- DOI: 10.1126/science.1116510
- Primary Citation of Related Structures:  
2APG, 2AQJ, 2AR8, 2ARD - PubMed Abstract: 
Chlorinated natural products include vancomycin and cryptophycin A. Their biosynthesis involves regioselective chlorination by flavin-dependent halogenases. We report the structural characterization of tryptophan 7-halogenase (PrnA), which regioselectively chlorinates tryptophan ...