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Solution structure and function of an essential CMP kinase of Streptococcus pneumoniae
Liping Yu1, Jamey Mack, Philip J Hajduk
1Pharmaceutical Discovery Division, Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, Illinois 60064-6098, USA. Liping.Yu@abbott.com
Protein Science : a Publication of the Protein Society
|October 24, 2003
Summary
Researchers identified a CMP kinase from Streptococcus pneumoniae as essential for bacterial growth. This finding offers a potential new drug target to combat antibiotic resistance in this major pathogen.
Area of Science:
- Biochemistry
- Structural Biology
- Microbiology
Background:
- Streptococcus pneumoniae is a leading cause of mortality and morbidity.
- Antibiotic resistance in S. pneumoniae poses a significant global health challenge.
Purpose of the Study:
- To determine the three-dimensional solution structure of S. pneumoniae CMP kinase.
- To identify potential drug targets for novel antibiotics against S. pneumoniae.
Main Methods:
- Nuclear Magnetic Resonance (NMR) spectroscopy was used to elucidate the protein structure.
- Chemical shift perturbations and NMR relaxation studies were employed to investigate substrate binding and domain dynamics.
Main Results:
- The S. pneumoniae CMP kinase structure comprises core, substrate-binding, and LID domains.
- CMP/CDP and ATP bind to distinct interfaces within the enzyme.
- The LID domain exhibits mobile loops potentially involved in catalysis.
Conclusions:
- S. pneumoniae CMP kinase (SP1603) is essential for bacterial viability.
- The enzyme's structure and substrate-binding characteristics present a promising target for new antibiotic development.
- Understanding the enzyme's dynamics may inform the design of inhibitors to overcome drug resistance.