Structural and functional characterization of Mycobacterium tuberculosis triosephosphate isomerase
| Autor: | Michelle K. Deaton, Sean E. Connor, Glenn C. Capodagli, Scott D. Pegan |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Models
Molecular Tuberculosis Population Molecular Sequence Data Isomerase Triosephosphate isomerase Microbiology Mycobacterium tuberculosis chemistry.chemical_compound Structural Biology DHAP medicine Animals Humans Amino Acid Sequence education Protein Structure Quaternary Dihydroxyacetone phosphate education.field_of_study biology Active site General Medicine medicine.disease biology.organism_classification Protein Structure Tertiary chemistry biology.protein Sequence Alignment Protein Binding Triose-Phosphate Isomerase |
| Zdroj: | Acta crystallographica. Section D, Biological crystallography. 67(Pt 12) |
| ISSN: | 1399-0047 |
| Popis: | Tuberculosis (TB) is a major infectious disease that accounts for over 1.7 million deaths every year. Mycobacterium tuberculosis, the causative agent of tuberculosis, enters the human host by the inhalation of infectious aerosols. Additionally, one third of the world's population is likely to be infected with latent TB. The incidence of TB is on the rise owing in part to the emergence of multidrug-resistant strains. As a result, there is a growing need to focus on novel M. tuberculosis enzyme targets. M. tuberculosis triosephosphate isomerase (MtTPI) is an essential enzyme for gluconeogenetic pathways, making it a potential target for future therapeutics. In order to determine its structure, the X-ray crystal structure of MtTPI has been determined, as well as that of MtTPI bound with a reaction-intermediate analog. As a result, two forms of the active site were revealed. In conjunction with the kinetic parameters obtained for the MtTPI-facilitated conversion of dihydroxyacetone phosphate (DHAP) to D-glyceraldehyde-3-phosphate (D-GAP), this provides a greater structural and biochemical understanding of this enzyme. Additionally, isothermal titration calorimetry was used to determine the binding constant for a reaction-intermediate analog bound to the active site of MtTPI. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text