Plant Physiol. Tips for Better Browsing
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on December 27, 2007; 10.1104/pp.107.114702

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrowOA All Versions of this Article:
146/2/492    most recent
pp.107.114702v2
pp.107.114702v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Robert Lange, P.
Right arrow Articles by Zrenner, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Robert Lange, P.
Right arrow Articles by Zrenner, R.
Agricola
Right arrow Articles by Robert Lange, P.
Right arrow Articles by Zrenner, R.

Received December 7, 2007
Accepted December 21, 2007

Functions of chloroplastic adenylate kinases in Arabidopsis thaliana

Peter Robert Lange , Claudia Geserick , Gilbert Tischendorf , and Rita Zrenner *

Max-Planck-Institut fur Molekulare Pflanzenphysiologie, Am Muhlenberg 1, 14476 Golm, Germany; Freie Universitat Berlin, Institut fur Biologie, Pflanzenphysiologie, Konigin-Luise-Str. 12-16, 14195 Berlin, Germany

* Corresponding author; email: zrenner{at}mpimp-golm.mpg.de.

Adenosine monophosphate kinase (AMK, adenylate kinase) catalyses the reversible formation of ADP by the transfer of one phosphate group from ATP to AMP, thus equilibrating adenylates. The Arabidopsis genome contains 10 genes with an adenylate/cytidylate kinase signature; seven of these are identified as putative adenylate kinases. Encoded proteins of at least two members of this Arabidopsis adenylate kinase gene family are targeted to plastids. However, when the individual genes are disrupted the phenotypes of both mutants are strikingly different. Although absence of AMK2 causes only 30% reduction of total adenylate kinase activity in leaves there is loss of chloroplast integrity leading to small, pale looking plantlets from embryo through to seedling development. In contrast, no phenotype for disruption of the second plastid adenylate kinase was found. From this analysis we conclude that AMK2 is the major activity for equilibration of adenylates and de novo synthesis of ADP in the plastid stroma.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 2007 by the American Society of Plant Biologists