Ma H et al. 1991
- Authors:
Ma H. Yanofsky MF. Meyerowitz EM.
- Title:
AGL1-AGL6, an Arabidopsis gene family with similarity to floral homeotic
and transcription factor genes.
- Reference location:
Genes & Development. 5(3):484-95, 1991 Mar.
- Abstract:
The predicted products of floral homeotic genes, AGAMOUS (AG) from
Arabidopsis thaliana and DEFICIENS A (DEF A) from Antirrhinum majus, have
been shown previously to share strong sequence similarity with
transcription factors from humans (SRF) and yeast (MCM1). The conserved
sequence between these proteins is localized within a domain known to be
necessary for the DNA binding and for the dimerization of SRF. We have
isolated six new genes from A. thaliana, AGL1-AGL6, which also have this
conserved sequence motif. On the basis of the sequence comparison between
the AG and AGL genes, they can be assigned to two subfamilies of a large
gene family. RNA dot blot analysis indicates that five of these genes
(AGL1, AGL2, AGL4, AGL5, and AGL6) are preferentially expressed in
flowers. In addition, in situ RNA hybridization experiments with AGL1 and
AGL2 show that their mRNAs are detected in some floral organs but not in
others. Our results suggest that these genes may act to control many steps
of Arabidopsis floral morphogenesis. In contrast, the AGL3 gene is
expressed in vegetative tissues as well as in flowers, suggesting that it
functions in a broader range of tissues. We discuss possible roles of this
gene family during the evolution of flowers.
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