HALF‐1, a bZIP‐type protein, interacting with the wheat transcription factor HBP‐1a contains a novel transcriptional activation domain

Okanami, Masahiro; Meshi, Tetsuo; Tamai, Hiroki; Iwabuchi, Masaki

doi:10.1046/j.1365-2443.1996.06006.x

Cited by 15 publications

(21 citation statements)

References 44 publications

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“…Similar motifs have also been identified in the N-terminal region of group G bZIP transcription factors in Arabidopsis, which have been shown to have transcriptional activation potential (Schindler et al, 1992b;Jakoby et al, 2002). Motif 7 identified in five OsbZIP transcription factors corresponds to GCB (GBF-conserved box; consensus NLNIGMDxW), which is a part of the trans-activation domain, conserved among plant HBP1a/GBF-type bZIP factors (Meier and Gruissem, 1994;Okanami et al, 1996). Interestingly, all seven OsbZIP factors possessing motif 6 and/or motif 7 are also predicted to be G-box binding factors as described later.…”

Section: Identification Of Additional Structural Features In Osbzip Tmentioning

confidence: 57%

Genomic Survey and Gene Expression Analysis of the Basic Leucine Zipper Transcription Factor Family in Rice

et al. 2007

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The basic leucine (Leu) zipper (bZIP) proteins compose a family of transcriptional regulators present exclusively in eukaryotes. The bZIP proteins characteristically harbor a bZIP domain composed of two structural features: a DNA-binding basic region and the Leu zipper dimerization region. They have been shown to regulate diverse plant-specific phenomena, including seed maturation and germination, floral induction and development, and photomorphogenesis, and are also involved in stress and hormone signaling. We have identified 89 bZIP transcription factor-encoding genes in the rice (Oryza sativa) genome. Their chromosomal distribution and sequence analyses suggest that the bZIP transcription factor family has evolved via gene duplication. The phylogenetic relationship among rice bZIP domains as well as with bZIP domains from other plant bZIP factors suggests that homologous bZIP domains exist in plants. Similar intron/exon structural patterns were observed in the basic and hinge regions of their bZIP domains. Detailed sequence analysis has been done to identify additional conserved motifs outside the bZIP domain and to predict their DNA-binding site specificity as well as dimerization properties, which has helped classify them into different groups and subfamilies, respectively. Expression of bZIP transcription factor-encoding genes has been analyzed by full-length cDNA and expressed sequence tag-based expression profiling. This expression profiling was complemented by microarray analysis. The results indicate specific or coexpression patterns of rice bZIP transcription factors starting from floral transition to various stages of panicle and seed development. bZIP transcription factor-encoding genes in rice also displayed differential expression patterns in rice seedlings in response to abiotic stress and light irradiation. An effort has been made to link the structure and expression pattern of bZIP transcription factor-encoding genes in rice to their function, based on the information obtained from our analyses and earlier known results. This information will be important for functional characterization of bZIP transcription factors in rice.

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Section: Identification Of Additional Structural Features In Osbzip Tmentioning

confidence: 57%

Genomic Survey and Gene Expression Analysis of the Basic Leucine Zipper Transcription Factor Family in Rice

et al. 2007

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“…For example, the full-length GAL4 protein, which is a yeast transcriptional activator, fails to activate transcription mediated by the GAL4-binding site in tobacco [7]. In another case, a transcriptional activation domain of wheat HALF-l, which was identified by a transactivation assay in tobacco BY-2 cells, did not show transactivation activity in yeast [8]. Therefore, for the analysis of plant transcription factors, a plant assay system is essential in addition to the heterologous assay system.…”

mentioning

confidence: 99%

A New Vector Set for GAL4-Dependent Transactivation Assay in Plants.

Yamamoto

Deng

1998

Plant Biotechnology

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To study transcriptional regulators, an in vivo functional assay is indispensable. Here we report a new convenient vector set for a transactivation assay in plants. The system consists of a luciferase reporter controlled by a synthetic promoter with GAL4-binding sites and an effector to express any fusion protein with the GAL4 DNA binding domain. Co-transfection of the two plasmids causes transactivation of the reporter by the expressed GAL4-effector fusion if the effector exhibits transcriptional activation activity. A multicloning site was introduced into the effector vector which should facilitate the construction of GAL4 -effector fusions . In tobacco transient assay by microprojectile bombardment, a 27-fold transactivation for the GAL4-B17 fusion as an effector was demonstrated with this system.

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“…The promoter regions of these genes contain cis-acting elements to bind proteins such as bZIPs and confer S phase-specific expression of histone genes. 64 …”

Section: Discussionmentioning

confidence: 99%

Identification of transcription factors linked to cell cycle regulation inArabidopsis

Nayeri

2014

Plant Signaling & Behavior

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Cell cycle is an essential process in growth and development of living organisms consists of the replication and mitotic phases separated by 2 gap phases; G1 and G2. It is tightly controlled at the molecular level and especially at the level of transcription. Precise regulation of the cell cycle is of central significance for plant growth and development and transcription factors are global regulators of gene expression playing essential roles in cell cycle regulation. This study has uncovered TFs that are involved in the control of cell cycle progression. With the aid of multi-parallel quantitative RT-PCR, the expression changes of 1880 TFs represented in the Arabidopsis TF platform was monitored in Arabidopsis synchronous MM2d cells during a 19 h period representing different time points corresponding to the 4 cell cycle phases after treatment of MM2d cells with Aphidicolin. Comparative TF expression analyses performed on synchronous cells resulted in the identification of 239 TFs differentially expressed during the cell cycle, while about one third of TFs were constitutively expressed through all time points. Phase-specific TFs were also identified.

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HALF‐1, a bZIP‐type protein, interacting with the wheat transcription factor HBP‐1a contains a novel transcriptional activation domain

Cited by 15 publications

References 44 publications

Genomic Survey and Gene Expression Analysis of the Basic Leucine Zipper Transcription Factor Family in Rice

Genomic Survey and Gene Expression Analysis of the Basic Leucine Zipper Transcription Factor Family in Rice

A New Vector Set for GAL4-Dependent Transactivation Assay in Plants.

Identification of transcription factors linked to cell cycle regulation inArabidopsis

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