Structural and functional study of ChuY from Escherichia coli strain CFT073
Kim, H., Chaurasia, A.K., Kim, T., Choi, J., Ha, S.C., Kim, D., Kim, K.K.(2017) Biochem Biophys Res Commun 482: 1176-1182
- PubMed: 27919686 
- DOI: https://doi.org/10.1016/j.bbrc.2016.12.008
- Primary Citation of Related Structures:  
5GUY - PubMed Abstract: 
The uropathogenic Escherichia coli strain CFT073 contains multiple iron and heme transport systems, which facilitate infection of the host urinary tract. To elucidate the molecular and cellular function of ChuY, a hypothetical gene in the heme degradation/utilization pathway, we solved the crystal structure of ChuY at 2.4 Å resolution. ChuY has high structural homology with human biliverdin and flavin reductase. We confirmed that ChuY has flavin mononucleotide (FMN) reductase activity, using NAD(P)H as a cofactor, and shows porphyrin ring binding affinity. A chuY deletion-insertion strain showed reduced survival potential compared to wild-type and complemented strains in mammalian cells. Current results suggest ChuY acts as a reductase in heme homeostasis to maintain the virulence potential of E. coli CFT073.
Organizational Affiliation: 
Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Gyeonggi 16419, South Korea.