Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Submitted on April 7, 2006
Accepted on April 25, 2006
Structure of the Eukaryotic Thiamine Pyrophosphate Riboswitch with Its Regulatory Ligand
Stéphane Thore 1, Marc Leibundgut 1, Nenad Ban 1*
1 ETH Zurich, Institute of Molecular Biology and Biophysics, 8092 Zurich, Switzerland.
* To whom correspondence should be addressed.
Nenad Ban , E-mail: ban{at}mol.biol.ethz.ch
Riboswitches are untranslated mRNA regions, which adopt alternatestructures depending on the binding of specific metabolites.Such conformational switching regulates the expression of proteinsinvolved in the biosynthesis of riboswitch substrates. Here,we present the 2.9 Å resolution crystal structure of theeukaryotic Arabidopsis thaliana thiamine pyrophosphate (TPP)specific riboswitch in complex with its natural ligand. Theriboswitch specifically recognizes the TPP via conserved residueslocated within two highly distorted parallel "sensor" helices.The structure provides the basis for understanding the reorganizationof the riboswitch fold upon TPP binding and explains the mechanismof resistance to the antibiotic pyrithiamine.
The editors suggest the following Related Resources on Science sites:
Thiamine biosynthesis in algae is regulated by riboswitches.
M. T. Croft, M. Moulin, M. E. Webb, and A. G. Smith (2007)
PNAS
104, 20770-20775
|Abstract »|Full Text »|PDF »
Vitamin B1 biosynthesis in plants requires the essential iron sulfur cluster protein, THIC.
M. Raschke, L. Burkle, N. Muller, A. Nunes-Nesi, A. R. Fernie, D. Arigoni, N. Amrhein, and T. B. Fitzpatrick (2007)
PNAS
104, 19637-19642
|Abstract »|Full Text »|PDF »
Riboswitch-dependent gene regulation and its evolution in the plant kingdom.
S. Bocobza, A. Adato, T. Mandel, M. Shapira, E. Nudler, and A. Aharoni (2007)
Genes & Dev.
21, 2874-2879
|Abstract »|Full Text »|PDF »
Riboswitch Control of Gene Expression in Plants by Splicing and Alternative 3' End Processing of mRNAs.
A. Wachter, M. Tunc-Ozdemir, B. C. Grove, P. J. Green, D. K. Shintani, and R. R. Breaker (2007)
PLANT CELL
19, 3437-3450
|Abstract »|Full Text »|PDF »
Guanine riboswitch variants from Mesoplasma florum selectively recognize 2'-deoxyguanosine.