ISDA

Deposition Date 2010-12-20

Release Date 2011-10-26

Last Version Date 2023-09-13

Entry Detail

PDB ID:

3Q2O

Keywords:

LYASE

Title:

Crystal Structure of purK: N5-carboxyaminoimidazole ribonucleotide synthetase

Biological Source:

Source Organism:

Bacillus anthracis (Taxon ID: 592021)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.96 Å

R-Value Free:

0.23

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 21 21 21

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Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:Phosphoribosylaminoimidazole carboxylase, ATPase subunit
Chain IDs:A, B
Chain Length:389
Number of Molecules:2
Biological Source:Bacillus anthracis

Ligand Molecules

Primary Citation

Structure of N(5)-carboxyaminoimidazole ribonucleotide synthase (PurK) from Bacillus anthracis.

Tuntland, M.L, Johnson, M.E, Fung, L.W, Santarsiero, B.D.Show

Acta Crystallogr.,Sect.D 67 870 874 (2011)

PMID: 21931218 DOI: 10.1107/S0907444911029210

Abstact

The apo structure of N5-carboxyaminoimidazole ribonucleotide synthase (PurK) from Bacillus anthracis (baPurK) with Mg2+ in the active site is reported at 1.96 Å resolution. PurK is an enzyme in the purine-biosynthetic pathway, unique to prokaryotes, that converts 5-aminoimidazole ribonucleotide to N5-carboxyaminoimidazole ribonucleotide and has been suggested as a potential antimicrobial drug target. Two interesting features of baPurK are a flexible B-loop (residues 149/150-157) that is in close contact with the active site and the binding of Mg2+ to the active site without additional ligands.

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Primary Citation of related structures