dc.contributor.author |
Evans, Genevieve |
en |
dc.contributor.author |
Schuldt, L |
en |
dc.contributor.author |
Griffin, MDW |
en |
dc.contributor.author |
Devenish, SRA |
en |
dc.contributor.author |
Pearce, FG |
en |
dc.contributor.author |
Perugini, MA |
en |
dc.contributor.author |
Dobson, Renwick |
en |
dc.contributor.author |
Jameson, GB |
en |
dc.contributor.author |
Weiss, MS |
en |
dc.contributor.author |
Gerrard, Juliet |
en |
dc.date.accessioned |
2012-03-04T22:40:15Z |
en |
dc.date.issued |
2011-08-15 |
en |
dc.identifier.citation |
Archives of Biochemistry and Biophysics 512(2):154-159 15 Aug 2011 |
en |
dc.identifier.issn |
0003-9861 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/12765 |
en |
dc.description.abstract |
Dihydrodipicolinate synthase (DHDPS) is a validated antibiotic target for which a new approach to inhibitor design has been proposed: disrupting native tetramer formation by targeting the dimer–dimer interface. In this study, rational design afforded a variant of Mycobacterium tuberculosis, Mtb-DHDPS-A204R, with disrupted quaternary structure. X-ray crystallography (at a resolution of 2.1 Å) revealed a dimeric protein with an identical fold and active-site structure to the tetrameric wild-type enzyme. Analytical ultracentrifugation confirmed the dimeric structure in solution, yet the dimeric mutant has similar activity to the wild-type enzyme. Although the affinity for both substrates was somewhat decreased, the high catalytic competency of the enzyme was surprising in the light of previous results showing that dimeric variants of the Escherichia coli and Bacillus anthracis DHDPS enzymes have dramatically reduced activity compared to their wild-type tetrameric counterparts. These results suggest that Mtb-DHDPS-A204R is similar to the natively dimeric enzyme from Staphylococcus aureus, and highlight our incomplete understanding of the role played by oligomerisation in relating protein structure and function. |
en |
dc.language |
EN |
en |
dc.publisher |
Elsevier Science |
en |
dc.relation.ispartofseries |
Archives of Biochemistry and Biophysics |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0003-9861/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.subject |
DHDPS |
en |
dc.subject |
Dihydrodipicolinate synthase |
en |
dc.subject |
Quaternary structure |
en |
dc.subject |
Tuberculosis |
en |
dc.subject |
ESCHERICHIA-COLI |
en |
dc.subject |
CRYSTAL-STRUCTURE |
en |
dc.subject |
QUATERNARY STRUCTURE |
en |
dc.subject |
RESOLUTION |
en |
dc.subject |
SMEGMATIS |
en |
dc.subject |
PROTEINS |
en |
dc.subject |
LYSINE |
en |
dc.subject |
REFINEMENT |
en |
dc.subject |
EVOLUTION |
en |
dc.subject |
MUTANTS |
en |
dc.title |
A tetrameric structure is not essential for activity in dihydrodipicolinate synthase (DHDPS) from Mycobacterium tuberculosis |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1016/j.abb.2011.05.014 |
en |
pubs.issue |
2 |
en |
pubs.begin-page |
154 |
en |
pubs.volume |
512 |
en |
dc.rights.holder |
Copyright: Elsevier Science Inc |
en |
dc.identifier.pmid |
21672512 |
en |
pubs.end-page |
159 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
223134 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
Biological Sciences |
en |
pubs.record-created-at-source-date |
2012-02-15 |
en |
pubs.dimensions-id |
21672512 |
en |