dc.contributor.author |
Green, S |
en |
dc.contributor.author |
Squire, Christopher |
en |
dc.contributor.author |
Nieuwenhuizen, NJ |
en |
dc.contributor.author |
Baker, Edward |
en |
dc.contributor.author |
Laing, William |
en |
dc.date.accessioned |
2012-02-27T02:16:34Z |
en |
dc.date.issued |
2009 |
en |
dc.identifier.citation |
Journal of Biological Chemistry 284(13):8652-8660 27 Mar 2009 |
en |
dc.identifier.issn |
0021-9258 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/12097 |
en |
dc.description.abstract |
Terpene synthases are a family of enzymes largely responsible for synthesizing the vast array of terpenoid compounds known to exist in nature. Formation of terpenoids from their respective 10-, 15-, or 20-carbon atom prenyl diphosphate precursors is initiated by divalent (M2 ) metal ion-assisted electrophilic attack. In addition to M2 , monovalent cations (M ) have also been shown to be essential for the activity of certain terpene synthases most likely by facilitating substrate binding or catalysis. An apple -farnesene synthase (MdAFS1), which has a dependence upon potassium (K ), was used to identify active site regions that may be important for M binding. Protein homology modeling revealed a surface- exposed loop (H- l loop) in MdAFS1 that fulfilled the necessary requirements for a K binding region. Site-directed mutagenesis analysis of specific residues within this loop then revealed their crucial importance to this K response and strongly implicated specific residues in direct K binding. The role of the H- l loop in terpene synthase K coordination was confirmed in a Conifer pinene synthase also using site-directed mutagenesis. These findings provide the first direct evidence for a specific M binding region in two functionally and phylogenetically divergent terpene synthases. They also provide a basis for understanding K activation in other terpene synthases and establish a new role for the H- l loop region in terpene synthase catalysis. |
en |
dc.publisher |
American Society for Biochemistry and Molecular Biology, Inc. |
en |
dc.relation.ispartofseries |
Journal of Biological Chemistry |
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/0021-9258/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Defining the potassium binding region in an apple terpene synthase. |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1074/jbc.M807140200 |
en |
pubs.begin-page |
8661 |
en |
pubs.volume |
284 |
en |
dc.rights.holder |
Copyright: American Society for Biochemistry and Molecular Biology, Inc. |
en |
dc.identifier.pmid |
19181671 |
en |
pubs.end-page |
8669 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
96566 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
Biological Sciences |
en |
pubs.org-id |
Science Research |
en |
pubs.org-id |
Maurice Wilkins Centre (2010-2014) |
en |
pubs.record-created-at-source-date |
2010-09-01 |
en |
pubs.dimensions-id |
19181671 |
en |