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HAP5 Triple Mutant vs. Constans Mutant

ABSTRACT: Aims: To compare the transcriptional profiles of an AtHAP5 (AtNF-YC, AtCBF-C) triple mutant vs. a Constans mutant. Background Information on Mutants: AtHAP5 triple mutant created by cross between the following SALK TDNA inserts: SALK_034838, SALK_058903, SALK_032163; these correspond to At1G54830, At1G08970, At5G63470, respectively. co-SAIL TDNA insertion SAIL_24_H04 corresponds to AT5G15840. Tissue: Above-ground whole plants grown for 10 days, under 16 hr light 8 hrs dark at constant 22C. Tissue collected 14 hrs after lights on. RT-PCR analysis on test RNA confirmed FT levels reduced in mutants lines compared to wild-type.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE20258 | GEO | 2010/04/20

SECONDARY ACCESSION(S): PRJNA124221

REPOSITORIES: GEO

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HAP5 Triple Mutant vs. Constans Mutant

Project description:Aims: To compare the transcriptional profiles of an AtHAP5 (AtNF-YC, AtCBF-C) triple mutant vs. a Constans mutant. Background Information on Mutants: AtHAP5 triple mutant created by cross between the following SALK TDNA inserts: SALK_034838, SALK_058903, SALK_032163; these correspond to At1G54830, At1G08970, At5G63470, respectively. co-SAIL TDNA insertion SAIL_24_H04 corresponds to AT5G15840. Tissue: Above-ground whole plants grown for 10 days, under 16 hr light 8 hrs dark at constant 22C. Tissue collected 14 hrs after lights on. RT-PCR analysis on test RNA confirmed FT levels reduced in mutants lines compared to wild-type. 9 samples were used in this experiment.

2010-04-28 | E-GEOD-20258 | biostudies-arrayexpress

CONSTANS Imparts DNA Sequence Specificity to the Histone Fold NF-YB/NF-YC Dimer

Project description:Nuclear Factor Y (NF-Y) is a heterotrimeric transcription factor that binds CCAAT elements. The NF-Y trimer is composed of a Histone Fold Domain (HFD) dimer (NF-YB/NF-YC) and NF-YA, which confers DNA sequence specificity. NF-YA shares a conserved domain with the CONSTANS, CONSTANS-LIKE, TOC1 (CCT) proteins. We show that CONSTANS (CO/B-BOX PROTEIN1 BBX1), a master flowering regulator, forms a trimer with Arabidopsis thaliana NF-YB2/NF-YC3 to efficiently bind the CORE element of the FLOWERING LOCUS T promoter. Using saturation mutagenesis, electrophoretic mobility shift assays, and RNA-sequencing profiling of co, nf-yb, and nf-yc mutants, we identify CCACA elements as the core NF-CO binding site. CO physically interacts with the same HFD surface required for NF-YA association, as determined by mutations in NF-YB2 and NF-YC9, and tested in vitro and in vivo. The co-7 mutation in the CCT domain, corresponding to an NF-YA arginine directly involved in CCAAT recognition, abolishes NF-CO binding to DNA

2022-06-09 | GSE205675 | GEO

Arabidopsis thaliana

Project description:HAP5 Triple Mutant vs. Constans Mutant

| PRJNA124221 | ENA

Characterization of miP1a/b (microProteins) overexpression plants, including a constans mutant (co-SAIL)

Project description:MicroProteins are short, single domain proteins that act by sequestering larger, multidomain proteins into non-functional complexes. MicroProteins have been identified in plants and animals, where they are mostly involved in the regulation of developmental processes. Here we show that two Arabidopsis thaliana microProteins, miP1a and miP1b, physically interact with CONSTANS (CO) a potent regulator of flowering time. The miP1a/b-type microProteins evolved in dicotyledonous plants and have an additional carboxy-terminal PF(V/L)FL motif. This motif enables miP1a/b microProteins to interact with TOPLESS/TOPLESS-RELATED (TPL/TPR) proteins. Interaction of CO with miP1a/b/TPL causes late flowering due to a failure in the induction of FLOWERING LOCUS T (FT) expression under inductive long day conditions. Both miP1a and miP1b are expressed in vascular tissue, where CO and FT are active. Genetically, miP1a/b act upstream of CO thus our findings unravel a novel layer of flowering time regulation via microProtein-inhibition. RNA-Seq transcriptome analysis of four biological samples were analysed with two technical replicates. Columbia wildtype plants Col-0, constans mutant plants co-SAIL, and two transgenic lines overexpressing a microProtein (miP1a and miP1b) were sequenced.

2016-03-08 | E-GEOD-56811 | biostudies-arrayexpress

CONSTANS Imparts DNA Sequence Specificity to the Histone Fold NF-YB/NF-YC Dimer

Project description:CONSTANS Imparts DNA Sequence Specificity to the Histone Fold NF-YB/NF-YC Dimer

| PRJNA847163 | ENA

Candidatus Nanohalobium constans strain:LC1Nh

Project description:Candidatus Nanohalobium constans strain:LC1Nh Genome sequencing and assembly

| PRJNA531595 | ENA

knock out mutant n575260-NAD biosynthesis in Arabidopsis : role of quinolinate phosphoribosyltransferase

Project description:rs11-01_nad - knock out mutant n575260 - Study of the impact of a deregulation in the NAD concentration in arabidopsis - Study of the biosynthesis of NAD in Arabidopsis. Involvment of QPRTgene using the knock out mutant N575260 from Salk.

2012-02-03 | GSE30976 | GEO

VASCULAR PLANT ONE-ZINC FINGER1 (VOZ1) and VOZ2 interact with CONSTANS in photoperiodic control of flowering

Project description:In plants, endogenous and environmental signals such as light control the timing of the transition to flowering . Two phytochrome B-interacting transcription factors, VASCULAR PLANT ONE–ZINC FINGER1 (VOZ1) and VOZ2 redundantly promote flowering in Arabidopsis thaliana. In the voz1 voz2 mutant the expression of FLOWERING LOCUS C (FLC) was up-regulated and expression of FLOWERING LOCUS T (FT) was down-regulated, which was proposed to be the cause of late flowering in voz1 voz2. However, the detailed mechanism by which the VOZ genes promote flowering is not well understood. Here, we show that neither the reduced FT-expression nor the late-flowering phenotype of voz1 voz2 is suppressed in the voz1 voz2 flc triple mutant . Genetic interaction experiments between voz1 voz2 and constans-2 (co-2) mutants reveal that the VOZs and CO work in the same genetic pathway. Using in vitro pull-down, electrophoretic mobility shift assays and bimolecular fluorescence complementation assays, we show that VOZ1 and VOZ2 interact with CO. The voz1 voz2 35S::CO:YFP plants show suppression of the early-flowering phenotype induced by CO-overexpression, showing that CO requires VOZ for induction of flowering. Determination of the VOZ consensus binding site followed by genome-wide sequence analysis failed to identify any VOZ-binding sites near known flowering-time genes. Together, these results indicate that the VOZ genes regulate flowering primarily through the photoperiod pathway, independent of FLC, and suggest that VOZs modulate CO function to promote flowering.

2018-04-18 | GSE111342 | GEO

Characterization of miP1a/b (microProteins) overexpression plants, including a constans mutant (co-SAIL)

2016-03-08 | GSE56811 | GEO

E-GEOD-20258

Project description:HAP5 Triple Mutant vs. Constans Mutant

2015-09-15 | E-GEOD-20258 | ExpressionAtlas