Catalytic Center Assembly of Hppk as Revealed by the Crystal Structure of a Ternary Complex at 1.25 A Resolution
Blaszczyk, J., Shi, G., Yan, H., Ji, X.(2000) Structure 8: 1049-1058
- PubMed: 11080626 
- DOI: https://doi.org/10.1016/s0969-2126(00)00502-5
- Primary Citation of Related Structures:  
1Q0N - PubMed Abstract: 
Folates are essential for life. Unlike mammals, most microorganisms must synthesize folates de novo. 6-Hydroxymethyl-7, 8-dihydropterin pyrophosphokinase (HPPK) catalyzes pyrophosphoryl transfer from ATP to 6-hydroxymethyl-7,8-dihydropterin (HP), the first reaction in the folate pathway, and therefore is an ideal target for developing novel antimicrobial agents. HPPK from Escherichia coli is a 158-residue thermostable protein that provides a convenient model system for mechanistic studies. Crystal structures have been reported for HPPK without bound ligand, containing an HP analog, and complexed with an HP analog, two Mg(2+) ions, and ATP.
Organizational Affiliation: 
Program in Structural Biology National Cancer Institute-Frederick Cancer Research and Development Center 21702, Frederick, MD 21702, USA.