Structure of Staphylococcus aureus adenylo-succinate lyase (PurB) and assessment of its potential as a target for structure-based inhibitor discovery

Paul K. Fyfe, Alice Dawson, Marie Theres Hutchison, Scott Cameron, William N. Hunter

Research output: Contribution to journalArticle

13 Citations (Scopus)
13 Downloads (Pure)

Abstract

The medium-resolution structure of adenylosuccinate lyase (PurB) from the bacterial pathogen Staphylococcus aureus in complex with AMP is presented. Oxalate, which is likely to be an artifact of crystallization, has been modelled in the active site and occupies a position close to that where succinate is observed in orthologous structures. PurB catalyzes reactions that support the provision of purines and the control of AMP/fumarate levels. As such, the enzyme is predicted to be essential for the survival of S. aureus and to be a potential therapeutic target. Comparisons of this pathogen PurB with the enzyme from Escherichia coli are presented to allow discussion concerning the enzyme mechanism. Comparisons with human PurB suggest that the close similarity of the active sites would make it difficult to identify species-specific inhibitors for this enyme. However, there are differences in the way that the subunits are assembled into dimers. The distinct subunit-subunit interfaces may provide a potential area to target by exploiting the observation that creation of the enzyme active site is dependent on oligomerization.

Original languageEnglish
Pages (from-to)881-888
Number of pages8
JournalActa Crystallographica Section D: Biological Crystallography
Volume66
Issue number8
Early online date9 Jul 2010
DOIs
Publication statusPublished - 1 Aug 2010
Externally publishedYes

Fingerprint Dive into the research topics of 'Structure of <i>Staphylococcus aureus </i>adenylo-succinate lyase (PurB) and assessment of its potential as a target for structure-based inhibitor discovery'. Together they form a unique fingerprint.

  • Cite this