| Gene Information | |
| NCBI Gene ID | 834031 |
| Symbol | MYB23 |
| LocusTag | AT5G40330 |
| Synonyms | ATMYB23|ATMYBRTF|MPO12.40|MPO12_40|MYB DOMAIN PROTEIN 23 |
| Description | MYB23 (myb domain protein 23); DNA binding / transcription factor |
| Gene Type | protein-coding |
| Pattern | MYB23|AT5G40330|ATMYB23|ATMYBRTF|MPO12.40|MPO12_40|MYB DOMAIN PROTEIN 23|MYB23 (myb domain protein 23); DNA binding / transcription factor |
| Corresponding sequence in Trichome EST library | |
| Reference |
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Functional diversification of MYB23 and GL1 genes in trichome morphogenesis and initiation. Kirik V, Lee MM, Wester K, Herrmann U, Zheng Z, Oppenheimer D, Schiefelbein J, Hulskamp M. Development. 2005 Apr;132(7):1477-85. ...... of duplicated genes is one of the driving forces in evolution. To understand the molecular mechanisms of gene diversification, we studied the functional relationship of the two Arabidopsis paralogous MYB-related genes GL1 and MYB23. We show that MYB23 controls trichome branching and trichome initiation at leaf edges. The latter is controlled redundantly together with GL1. We show that the two proteins are functionally equivalent during trichome initiation but not ...... |
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...... trichome branching. RT-PCR and reporter construct analysis revealed spatial, temporal and genetic differences in transcriptional regulation of the GL1 and MYB23 genes. Presented data indicate that the diversification of GL1 and MYB23 gene functions occurred at the level of cis-regulatory sequences with respect to trichome initiation, and that, in parallel, the diversification with respect to regulation of trichome branching also involved changes in respective proteins. ...... |
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Dominant repression of target genes by chimeric repressors that include the EAR motif, a repression domain, in Arabidopsis. Hiratsu K, Matsui K, Koyama T, Ohme-Takagi M. Plant J. 2003 Jun;34(5):733-9. ...... repressors in transgenic Arabidopsis and suppress the expression of specific target genes, even in the presence of the redundant transcription factors, with resultant dominant loss-of-function phenotypes. Chimeric EIN3, CUC1, PAP1, and AtMYB23 repressors that included the EAR motif dominantly suppressed the expression of their target genes and caused insensitivity to ethylene, cup-shaped cotyledons, reduction in the accumulation of anthocyanin, and absence of trichomes, ...... |
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Ectopic expression of the Arabidopsis AtMYB23 gene induces differentiation of trichome cells. Kirik V, Schnittger A, Radchuk V, Adler K, Hulskamp M, Baumlein H. Dev Biol. 2001 Jul 15;235(2):366-77. ...... The control of epidermal cell fate is a complex molecular process and requires the regulatory activity of different transcription factors. Here, we describe the isolation of a member of the Arabidopsis MYB transcription factor family, AtMYB23, that is involved in trichome development. Expression of the AtMYB23 gene under the control of the viral CaMV 35S promoter causes the development of ectopic trichomes. The formation of ectopic trichomes depends on TRANSPARENT TESTA GLABRA1 ...... |
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...... GLABRA1. The absence of the negative regulator TRIPTYCHON leads to branching of the ectopic trichomes on cotyledons and the formation of ectopic trichomes in the leaf subepidermal cell layer. The CaMV 35S promoter-controlled expression of AtMYB23 can partially rescue the glabra1 mutant phenotype. Together, the presented data indicate that the AtMYB23 gene has partially overlapping functions with GLABRA1 in controlling the initiation of trichome development. Copyright 2001 Academic ...... |