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Brief Communication Arising
Nature 456, E5-E6 (11 December 2008) | doi:10.1038/nature07646; Received 25 June 2008; Accepted 11 November 2008
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Postdoctoral Fellow / Research Associate
- Beth Israel Deaconess Medical Center/Harvard Medical School
- Boston, MA, USA
Junior Research Groups (W1 / W2)
- Cluster of Excellence "Multimodal Computing and Interaction"
- Saarbruecken Germany
FCA does not bind abscisic acid
Joanna M. Risk1, Richard C. Macknight1 & Catherine L. Day1
Abstract
Arising from: Fawzi A. Razem, Ashraf El-Kereamy, Suzanne R. Abrams & Robert D. Hill Nature 439, 290–294 (2006)
The RNA-binding protein FCA promotes flowering in Arabidopsis1. Razem et al.2 reported that FCA is also a receptor for the phytohormone abscisic acid (ABA). However, we find that FCA does not bind ABA, suggesting that the quality of the proteins assayed and the sensitivity of the ABA-binding assay have led Razem et al. to erroneous conclusions. Because similar assays have been used to characterize other ABA receptors3, 4, our results indicate that the ABA-binding properties of these proteins should be carefully re-evaluated and that alternative ABA receptors are likely to be discovered.
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