3I93

Crystal structure of Mycobacterium tuberculosis dUTPase STOP138T mutant

Summary for 3I93

• Entry DOI: 10.2210/pdb3i93/pdb
• Related: 2PY4 3H6D 3HZA
• Descriptor: Deoxyuridine 5'-triphosphate nucleotidohydrolase, MAGNESIUM ION, 2'-DEOXYURIDINE 5'-ALPHA,BETA-IMIDO-TRIPHOSPHATE, ... (5 entities in total)
• Functional Keywords: jelly-roll, enzyme-ligand complex, hydrolase, magnesium, metal-binding, nucleotide metabolism
• Biological source: Mycobacterium tuberculosis
• Total number of polymer chains: 1
• Total formula weight: 17304.63

Authors

Leveles, I.,Harmat, V.,Lopata, A.,Toth, J.,Vertessy, B.G. (deposition date: 2009-07-10, release date: 2009-11-24, Last modification date: 2023-09-06)

Primary citation

Takacs, E.,Nagy, G.,Leveles, I.,Harmat, V.,Lopata, A.,Toth, J.,Vertessy, B.G.
Direct contacts between conserved motifs of different subunits provide major contribution to active site organization in human and mycobacterial dUTPases.
Febs Lett., 584:3047-3054, 2010

PubMed Abstract: dUTP pyrophosphatases (dUTPases) are essential for genome integrity. Recent results allowed characterization of the role of conserved residues. Here we analyzed the Asp/Asn mutation within conserved Motif I of human and mycobacterial dUTPases, wherein the Asp residue was previously implicated in Mg(2+)-coordination. Our results on transient/steady-state kinetics, ligand binding and a 1.80 A resolution structure of the mutant mycobacterial enzyme, in comparison with wild type and C-terminally truncated structures, argue that this residue has a major role in providing intra- and intersubunit contacts, but is not essential for Mg(2+) accommodation. We conclude that in addition to the role of conserved motifs in substrate accommodation, direct subunit interaction between protein atoms of active site residues from different conserved motifs are crucial for enzyme function.

PubMed: 20493855
DOI: 10.1016/j.febslet.2010.05.018

Experimental method

X-RAY DIFFRACTION (1.8 Å)