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Published on May 5, 2006; 10.1104/pp.106.076893

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Received January 12, 2006
Returned for revision February 6, 2006
Accepted May 2, 2006

DAWDLE, a forkhead-associated domain gene, regulates multiple aspects of plant development

Erin R. Morris , David Chevalier , and John C. Walker *

Division of Biological Sciences, 304 Life Sciences Center, University of Missouri-Columbia, Columbia MO 65211, (573) 882 3481
Division of Biological Sciences, University of Missouri-Columbia, 371 Life Sciences Center, Columbia, MO 65211, (573) 882-3583

* Corresponding author; email: WalkerJ{at}missouri.edu.

Phosphoprotein-binding domains are found in many different proteins and specify protein-protein interactions critical for signal transduction pathways. Fork-head associated (FHA) domains bind phosphothreonine and control many aspects of cell proliferation in yeast and animal cells. The Arabidopsis thaliana protein, Kinase Associated Protein Phosphatase includes a FHA domain that mediates interactions with receptor-like kinases, which in turn regulate a variety of signaling pathways involved plant growth and pathogen responses. Screens for insertional mutations in other Arabidopsis FHA domain containing genes identified a mutant with pleiotropic defects. dawdle (ddl) plants are developmentally delayed, produce defective roots, shoots, flowers, and have reduced seed set. DDL is expressed in the root and shoot meristems and the reduced size of the root apical meristem in ddl plants suggest a role early in organ development.




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A. Mahajan, C. Yuan, H. Lee, E. S.-W. Chen, P.-Y. Wu, and M.-D. Tsai
Structure and Function of the Phosphothreonine-Specific FHA Domain
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B. Yu, L. Bi, B. Zheng, L. Ji, D. Chevalier, M. Agarwal, V. Ramachandran, W. Li, T. Lagrange, J. C. Walker, et al.
The FHA domain proteins DAWDLE in Arabidopsis and SNIP1 in humans act in small RNA biogenesis
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