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Science 19 December 1997:
Vol. 278. no. 5346, pp. 2120 - 2123
DOI: 10.1126/science.278.5346.2120
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Reports

Arabidopsis NPH1: A Protein Kinase with a Putative Redox-Sensing Domain

Eva Huala, Paul W. Oeller, * Emmanuel Liscum, dagger In-Seob Han, ddagger Elise Larsen, § Winslow R. Briggs |

The NPH1 (nonphototropic hypocotyl 1) gene encodes an essential component acting very early in the signal-transduction chain for phototropism. Arabidopsis NPH1 contains a serine-threonine kinase domain and LOV1 and LOV2 repeats that share similarity (36 to 56 percent) with Halobacterium salinarium Bat, Azotobacter vinelandii NIFL, Neurospora crassa White Collar-1, Escherichia coli Aer, and the Eag family of potassium-channel proteins from Drosophila and mammals. Sequence similarity with a known (NIFL) and a suspected (Aer) flavoprotein suggests that NPH1 LOV1 and LOV2 may be flavin-binding domains that regulate kinase activity in response to blue light-induced redox changes.

Department of Plant Biology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305, USA.
*   Present address: DNA Plant Technology, 6701 San Pablo Avenue, Oakland, CA 94508, USA.

dagger    Present address: Biology Department, University of Missouri, Columbia, MO 65211, USA.

ddagger    Present address: Department of Biology, University of Ulsan, Kyungnam, Ulsan 680-749, Korea.

§   Present address: Department of Botany and Plant Science, University of California, Riverside, CA 92521, USA.

|   To whom correspondence should be addressed. E-mail: briggs{at}andrew.stanford.edu

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G. Lascève, J. Leymarie, M. A. Olney, E. Liscum, J. M. Christie, A. Vavasseur, and W. R. Briggs (1999)
Plant Physiology 120, 605-614
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The Multisensory Guard Cell. Stomatal Responses to Blue Light and Abscisic Acid.
S. M. Assmann and K.-i. Shimazaki (1999)
Plant Physiology 119, 809-816
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Flavonoids Promote Haustoria Formation in the Root Parasite Triphysaria versicolor.
H. Albrecht, J. I. Yoder, and D. A. Phillips (1999)
Plant Physiology 119, 585-592
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Science. ISSN 0036-8075 (print), 1095-9203 (online)