Femtomolar sensitivity of a NO sensor from Clostridium botulinum
Nioche, P., Berka, V., Vipond, J., Minton, N., Tsai, A.-L., Raman, C.S.(2004) Science 306: 1550-1553
- PubMed: 15472039 
- DOI: 10.1126/science.1103596
- Primary Citation of Related Structures:  
1XBN - PubMed Abstract: 
Nitric oxide (NO) is extremely toxic to Clostridium botulinum, but its molecular targets are unknown. Here, we identify a heme protein sensor (SONO) that displays femtomolar affinity for NO. The crystal structure of the SONO heme domain reveals a previously undescribed fold and a strategically placed tyrosine residue that modulates heme-nitrosyl coordination ...