2C9D

Lumazine Synthase from Mycobacterium tuberculosis Bound to 3-(1,3,7- TRIHYDRO-9-D-RIBITYL-2,6,8-PURINETRIONE-7-YL)HEXANE 1-PHOSPHATE

Summary for 2C9D

• Entry DOI: 10.2210/pdb2c9d/pdb
• Related: 1W19 1W29 2C92 2C94 2C97 2C9B
• Descriptor: 6,7-DIMETHYL-8-RIBITYLLUMAZINE SYNTHASE, 3-(1,3,7-TRIHYDRO-9-D-RIBITYL-2,6,8-PURINETRIONE-7-YL ) HEXANE 1-PHOSPHATE, POTASSIUM ION, ... (5 entities in total)
• Functional Keywords: transferase, riboflavin biosynthesis, mycobacterium tuberculosis, lumazine synthase, inhibitor binding
• Biological source: MYCOBACTERIUM TUBERCULOSIS
• Total number of polymer chains: 10
• Total formula weight: 169600.40

Authors

Morgunova, E.,Illarionov, B.,Jin, G.,Haase, I.,Fischer, M.,Cushman, M.,Bacher, A.,Ladenstein, R. (deposition date: 2005-12-09, release date: 2006-12-13, Last modification date: 2023-12-13)

Primary citation

Morgunova, E.,Illarionov, B.,Sambaiah, T.,Haase, I.,Bacher, A.,Cushman, M.,Fischer, M.,Ladenstein, R.
Structural and Thermodynamic Insights Into the Binding Mode of Five Novel Inhibitors of Lumazine Synthase from Mycobacterium Tuberculosis.
FEBS J., 273:4790-4804, 2006

PubMed Abstract: Recently published genomic investigations of the human pathogen Mycobacterium tuberculosis have revealed that genes coding the proteins involved in riboflavin biosynthesis are essential for the growth of the organism. Because the enzymes involved in cofactor biosynthesis pathways are not present in humans, they appear to be promising candidates for the development of therapeutic drugs. The substituted purinetrione compounds have demonstrated high affinity and specificity to lumazine synthase, which catalyzes the penultimate step of riboflavin biosynthesis in bacteria and plants. The structure of M. tuberculosis lumazine synthase in complex with five different inhibitor compounds is presented, together with studies of the binding reactions by isothermal titration calorimetry. The inhibitors showed the association constants in the micromolar range. The analysis of the structures demonstrated the specific features of the binding of different inhibitors. The comparison of the structures and binding modes of five different inhibitors allows us to propose the ribitylpurinetrione compounds with C4-C5 alkylphosphate chains as most promising leads for further development of therapeutic drugs against M. tuberculosis.

PubMed: 16984393
DOI: 10.1111/J.1742-4658.2006.05481.X

Experimental method

X-RAY DIFFRACTION (2.8 Å)