Gene Ontology annotation through association of InterPro records with GO terms
Annotation inferences using phylogenetic trees
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping
Electronic Gene Ontology annotations created by ARBA machine learning models
Distinct roles of CONSTANS target genes in reproductive development of Arabidopsis.
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Steroid-inducible CONSTANS experiments identify SOC1 and FT as early CO targets, and genetics establishes their positive contribution to CO-mediated flowering. The accessible abstract also reports regulation by a CO-independent pathway.
"Two of these genes, SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOC1) and FLOWERING LOCUS T (FT), are required for CO to promote flowering; the others are involved in proline or ethylene biosynthesis."
The AGAMOUS-LIKE 20 MADS domain protein integrates floral inductive pathways in Arabidopsis.
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Activation tagging identifies AGL20/SOC1 as a dominant suppressor of FRI-associated late flowering. AGL20 overexpression suppresses late flowering, while its expression integrates vernalization, autonomous and photoperiod pathway inputs; this is positive developmental regulation rather than a structural floral-organ activity.
"Overexpression of AGL20 suppresses not only the late flowering of plants that have functional FRI and FLC alleles but also the delayed phase transitions during the vegetative stages of plant development."
Arabidopsis transcription factors: genome-wide comparative analysis among eukaryotes.
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The genome-wide comparison provides transcription-factor family context for the original SOC1 ISS annotation. Its abstract discusses conserved DNA-binding domains across eukaryotes but does not report a SOC1-specific promoter assay; direct SOC1 evidence is supplied by other references.
"Arabidopsis transcription factors that belong to families common to all eukaryotes do not share significant similarity with those of the other kingdoms beyond the conserved DNA binding domains, many of which have been arranged in combinations specific to each lineage."
A MADS domain gene involved in the transition to flowering in Arabidopsis.
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Late-flowering agl20 mutants and constitutive-expression experiments establish a positive role in flowering-time control; AGL20 expression at the shoot apex integrates photoperiodic and gibberellin inputs.
"By transposon tagging we have identified late flowering agl20 mutants, showing that AGL20 is involved in flowering time control."
APETALA1 and SEPALLATA3 interact to promote flower development.
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The AP1/CAL yeast two-hybrid screen identifies five MADS-box partners, but the accessible abstract names only SEP3. It supplies the original interaction-screen context without independently resolving the SOC1 pair; the retained heterodimerization refinement is supported by the independent MADS interaction map and SOC1-AGL24 experiments.
"To identify proteins that may interact with AP1 and CAL, we used the yeast two-hybrid assay."
Molecular and phylogenetic analyses of the complete MADS-box transcription factor family in Arabidopsis: new openings to the MADS world.
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The complete Arabidopsis MADS-box family analysis provides phylogenetic, domain and expression context for SOC1 classification. The abstract describes the family analysis, not a SOC1-specific biochemical assay.
"We have divided this transcription factor family into five groups (named MIKC, Malpha, Mbeta, Mgamma, and Mdelta) based on the phylogenetic relationships of the conserved MADS-box domain."
Comprehensive interaction map of the Arabidopsis MADS Box transcription factors.
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The matrix yeast two-hybrid map places SOC1 among floral-induction MADS proteins that interact with floral-organ-identity proteins. These data support heterodimer capacity without establishing that every yeast pair forms an obligatory native complex.
"Surprisingly, SVP, SOC1, and AGL24 also interact directly with the floral organ identity proteins."
Quantitative effects of vernalization on FLC and SOC1 expression.
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SOC1 expression is quantitatively induced by vernalization as FLC is repressed, and also responds acutely to cold exposure. This supports the retained non-core cold-response context without implying temperature sensing.
"In addition, we show that SOC1 undergoes an acute induction by both short and long cold exposures."
Direct interaction of AGL24 and SOC1 integrates flowering signals in Arabidopsis.
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Reciprocal promoter binding and promoter-mutagenesis experiments support a SOC1-AGL24 positive-feedback circuit at the shoot apex.
"ChIP assay using a functional SOC1-9myc-tagged line and promoter mutagenesis analysis also revealed in vivo binding of SOC1-9myc to the regulatory regions of AGL24 and upregulation of AGL24 at the shoot apex by SOC1."
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The SOC1-AGL24 regulatory interaction mediates the flowering response to gibberellins under short-day conditions; this does not make SOC1 a hormone receptor.
"the effect of gibberellins on flowering under short-day conditions was mediated by the interaction between AGL24 and SOC1."
SOC1 translocated to the nucleus by interaction with AGL24 directly regulates leafy.
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SOC1 directly binds LFY regulatory DNA. In transient protoplast assays AGL24 promotes SOC1 nuclear accumulation, and the authors propose the heterodimer as a mechanism of LFY activation; this localization context is retained explicitly.
"The full-length SOC1 protein locates in the cytoplasm if expressed alone in protoplast transient expression assay, but relocates to the nucleus if expressed with AGAMOUS-LIKE 24 (AGL24)"
Pin1At encoding a peptidyl-prolyl cis/trans isomerase regulates flowering time in Arabidopsis.
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Pin1At binds phosphorylated SOC1 and accelerates isomerization of its phosphorylated Ser/Thr-Pro motifs. SOC1 is the modified substrate, so this finding does not confer Pin1At catalytic activity on SOC1.
"Pin1At interacts with the phosphorylated AGL24 and SOC1 in vitro and with AGL24 and SOC1 in vivo and accelerates the cis/trans conformational change of phosphorylated Ser/Thr-Pro motifs of AGL24 and SOC1."
Arabidopsis BLADE-ON-PETIOLE1 and 2 promote floral meristem fate and determinacy in a previously undefined pathway targeting APETALA1 and AGAMOUS-LIKE24.
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BOP1/2 and floral identity regulators repress flowering-time regulators in stage 2 floral meristems. The accessible abstract names AGL24 rather than SOC1 and does not expose the SOC1 genotype underlying the curated IGI assertion; the supported SOC1 meristem role remains non-core with that source-specific access limit.
"all three activities converge to down-regulate flowering-time regulators including AGAMOUS-LIKE24 in stage 2 floral meristems."
Evidence for network evolution in an Arabidopsis interactome map.
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The original source establishes the yeast two-hybrid binary-interactome method. The SOC1 annotation records AP1/FUL partners, but those exact pairs are not independently visible in the cached main text; native heterodimer stoichiometry is not inferred from the screen. Independent SOC1 MADS interaction studies support the molecular-function refinement.
"We tested all pair-wise combinations of proteins encoded by these constructs (space 1) with an improved high-throughput binary interactome mapping pipeline based on the yeast two-hybrid (Y2H) system (fig. S2) (3, 4)."
Phytoplasma effector SAP54 hijacks plant reproduction by degrading MADS-box proteins and promotes insect colonization in a RAD23-dependent manner.
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SAP54 co-immunoprecipitates with SOC1 in transiently expressing Nicotiana benthamiana and destabilizes selected MADS proteins in plant assays. This supports SOC1 as an effector target, not as the enzyme executing degradation.
"10xmyc-tagged AP1, SEP3, and SOC1 readily co-immunoprecipitate with GFP-tagged SAP54 (but not GFP), whereas Type I AGL50 (Type I MTF) was not pulled down with SAP54 (Figure 2D, Tables S8, S9)."
Floral regulators FLC and SOC1 directly regulate expression of the B3-type transcription factor TARGET OF FLC AND SVP 1 at the Arabidopsis shoot apex via antagonistic chromatin modifications.
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SOC1 promotes TFS1 transcription at floral transition and opposes Polycomb repression through recruitment of REF6 and BRM. The chromatin enzymes retain their own catalytic roles; SOC1 supplies target-directed transcriptional regulation.
"SOC1 opposes PRC function at TFS1 through recruitment of the histone demethylase RELATIVE OF EARLY FLOWERING 6 (REF6) and the SWI/SNF chromatin remodeler ATPase BRAHMA (BRM)."
OXIDATIVE STRESS 3 regulates drought-induced flowering through APETALA 1.
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OXS3 binds SOC1 in vitro and in vivo; transient AP1-promoter repression by OXS3 requires SOC1 for its full effect. This is a context-dependent regulatory interaction rather than evidence that SOC1 is invariably an activator.
"Overexpression of OXS3 in a transient expression assay was found to repress the AP1 promoter, and the full repression effect required SOC1."
UniProtKB record O64645 for Arabidopsis thaliana SOC1
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The curated record summarizes SOC1 flowering-time transcriptional activation, SOC1-AGL24 heterodimer formation and partner-dependent subcellular localization.
"Forms a heterodimer with AGL24 through MADS-box domain."
PANTHER PTHR48019 MADS-box/MEF2 transcription factor family context
Falcon deep research report on SOC1