Structure and nucleotide specificity of Staphylococcus aureus dihydrodipicolinate reductase (DapB)
Girish, T.S., Navratna, V., Gopal, B.(2011) FEBS Lett 585: 2561-2567
- PubMed: 21803042 
- DOI: https://doi.org/10.1016/j.febslet.2011.07.021
- Primary Citation of Related Structures:  
3QY9 - PubMed Abstract: 
Lysine biosynthesis proceeds by the nucleotide-dependent reduction of dihydrodipicolinate (DHDP) to tetrahydrodipicolinate (THDP) by dihydrodipicolinate reductase (DHDPR). The S. aureus DHDPR structure reveals different conformational states of this enzyme even in the absence of a substrate or nucleotide-cofactor. Despite lacking a conserved basic residue essential for NADPH interaction, S. aureus DHDPR differs from other homologues as NADPH is a more preferred co-factor than NADH. The structure provides a rationale-Lys35 compensates for the co-factor site mutation. These observations are significant for bi-ligand inhibitor design that relies on ligand-induced conformational changes as well as co-factor specificity for this important drug target.
Organizational Affiliation: 
Molecular Biophysics Unit, Indian Institute of Science, Bangalore, India.