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Published March 1999 | public
Journal Article

HUA1 and HUA2 Are Two Members of the Floral Homeotic AGAMOUS Pathway

Abstract

The identities of the four floral organ types in an Arabidopsis flower are specified by the combinatorial activities of the floral homeotic A, B, and C function genes; AGAMOUS is the only known C function gene. We have identified two genes that interact with AG in the specification of floral structure, HUA1 and HUA2, from a screen for enhancers of a weak ag allele, ag-4. HUA1 and HUA2 are involved in all aspects of AG function. HUA2 encodes a novel protein that contains nuclear localization signals and signature motifs that suggest HUA2, like AG, may be a transcription factor. Molecular analyses suggest that HUA2 (and possibly HUA1) acts to facilitate AG action at the same hierarchical level as AG.

Additional Information

© 1999 Cell Press. Received 4 December 1998, Revised 24 December 1998. We are grateful to Dr. Satoshi Tabata at the Kazusa DNA Research Institute in Japan for providing the P1 clones MYJ24 and MKD15. We thank Dr. Toshiro Ito for providing the AG antibodies. We thank members of the Meyerowitz lab, C.-F. Chuang, C. Baker, J. Fletcher, T. Ito, C. Ohno, R. Sablowski, D. Wagner, and E. Ziegelhoffer for their comments on the manuscript. X. C. was supported by the National Institutes of Health postdoctoral fellowship #GM17512–02. This work was supported by NIH grant GM 45697 to E. M. M.

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023