Recombinant Arabidopsis thaliana Phytochrome B (PHYB), partial

1. A family of nuclear protein kinases, designated Photoregulatory Protein Kinases (PPK1-4; formerly called MUT9-Like Kinases (MLKs)), that interact with PIF3 and phyB in a light-induced manner in vivo have been identified. PMID: 28492231
2. This study demonstrates that the dimeric form of the C-terminal module plays important signaling roles by targeting PHYB to subnuclear photobodies and interacting with PIF3 to trigger its degradation. PMID: 29199270
3. UVR8 and its mediated signaling pathway via interaction with COP1 can be induced by He-Ne laser, and these processes were dependent on cytoplasmic PhyB levels in plant cells. PMID: 29138939
4. RVE1 and RVE2 transcription factors promote primary seed dormancy and repress red/far-red-light-reversible germination downstream of phytochrome B (phyB) in Arabidopsis thaliana. RVE1 and RVE2 expression is downregulated after imbibition and by phyB. PMID: 27506149
5. Mutant analyses and genetic complementation assays show that Phytochrome B is a negative regulator of nucleus size. PMID: 28592555
6. Mapping light-driven conformational changes within the photosensory module of plant phytochrome B. PMID: 27694986
7. PhyB enhanced the GEF activity of RopGEF2 toward both ROP7 and ROP2 under light. PMID: 28188273
8. a null mutation of the JAZ10 gene in Arabidopsis did not affect plant growth nor did it suppress the shade-avoidance responses elicited by phyB inactivation. PMID: 27943325
9. Light was efficiently conducted through the stems to the roots, where photoactivated phytochrome B (phyB) triggered expression of ELONGATED HYPOCOTYL 5 (HY5) and accumulation of HY5 protein, a transcription factor that promotes root growth in response to light. PMID: 27803284
10. Genetic evidence indicated that HDA15 acts downstream of PHYB and represses seed germination in the dark dependent on PIF1. PMID: 28444370
11. phytochrome B (phyB) directly associates with the promoters of key target genes in a temperature-dependent manner. The rate of phyB inactivation is proportional to temperature in the dark, enabling phytochromes to function as thermal timers that integrate temperature information over the course of the night. PMID: 27789797
12. this study proposes that in addition to its photoreceptor functions, phyB is a temperature sensor in plants. PMID: 27789798
13. The light-activated association of phyB, EIN3, and EBF1/EBF2 proteins stimulates robust EIN3 degradation by SCF(EBF1/EBF2) E3 ligases. We reveal that phyB manipulates substrate-E3 ligase interactions in a light-dependent manner, thus directly controlling the stability of EIN3. PMID: 27889482
14. Surprisingly, none of the phytochromes alone conferred a photoperiodic response. Although phyE and phyB were the strongest repressors of flowering, both phyB and phyC were needed to confer a flowering response to photoperiod. Thus, a specific combination of phytochromes is required to detect changes in photoperiod PMID: 27820825
15. UV-C radiation treatment caused a disturbance in photosystem II and a deregulation of photosynthetic pigment content and antioxidant enzymes activities, followed by increased cell mortality rate in phyB and phyAB null mutants. PMID: 26385378
16. PhyB acts in the phloem to regulate flowering time.PHYB and HOS1 regulate flowering time additively. PMID: 26373454
17. the YHB mutation is sufficient to phenocopy red light input into the circadian mechanism and to sustain robust rhythms in steady-state mRNA levels even in plants grown without light or exogenous sugars. PMID: 26157113
18. High-level expression and phosphorylation of phytochrome B modulates flowering time in Arabidopsis. PMID: 26120968
19. Data indicate that both phyA and phyB promote seedling photomorphogenesis in a synergistic manner in high-irradiance white light and act antagonistically under far-red light. PMID: 26030677
20. Interaction of phyB with SPA1 promotes COP1-SPA1 dissociation and photomorphogenic development. PMID: 25744387
21. Phytochrome B senses the temperature or mediates signal transduction of temperature effects. PMID: 25289638
22. phytochromeB expression in the stomatal lineage, mesophyll, and phloem is sufficient to restore wild-type stomatal development. Induction of PHYB in mature leaves also rescues stomatal development in young untreated leaves. PMID: 24835461
23. phyB inhibits leaf flatness; phyB is required for the curled leaf phenotype of the phot1phot2 mutant PMID: 25009300
24. Low low red : far-red (R : FR) ratios and the phyB mutation stabilized the protein JAZ10. PMID: 25103816
25. photo-excited phyB is required for stabilization of the COL7 protein PMID: 24908267
26. A mutation within the phyB gene confers resistance to the herbicide glyphosate. PMID: 24654847
27. PIF3 lies downstream of PHYB and RGL3, and plays an important role in the inhibitory effect of NO on root growth of Arabidopsis seedlings in light. PMID: 24157606
28. phyB suppresses auxin signaling to promote branching. PMID: 24492336
29. ATHB23 transcription factor is a novel component of the phyB-mediated red light signaling pathway. PMID: 23964902
30. this Arabidopsis PhyB structure should enable molecular insights into plant Phy signaling and provide an essential scaffold to redesign their activities for agricultural benefit and as optogenetic reagents PMID: 24982198
31. ABP1 and phyB participate auxin and red light signalling. PMID: 24052532
32. PHYTOCHROME B restricts ethylene biosynthesis and constrains the -day/night temperature difference-induced phase shift in rhythmic growth. PMID: 23979970
33. Brief heat shocks enhance the inhibition of hypocotyl growth induced by light perceived by phytochrome B in deetiolating Arabidopsis thaliana seedlings. PMID: 23933882
34. From a phyB null mutant background, singly and doubly transgenic plants are generated that express fusion proteins containing the phyB-phyE N-terminal photosensory regions. PMID: 23738620
35. Data show that photoreceptor phyB-induced transcription factor PIF3 phosphorylation is required for the known negative feedback modulation of phyB levels in prolonged light, potentially through codegradation of phyB and PIF3. PMID: 23903316
36. Phosphorylation of phytochrome B inhibits light-induced signaling via accelerated dark reversion in Arabidopsis. PMID: 23378619
37. PHYB plays a role in repressing far-red (FR) light signaling. Activity modulation of the COP1-SPA E3 complex by light-activated phytochromes is an effective and pivotal regulatory step in light signaling. PMID: 23371951
38. A collection of phyB mutants was generated affecting the bilin-binding pocket that altered photochemistry, thermal stability, and/or nuclear localization patterns, some of which also impacted phenotypic outputs. PMID: 23321421
39. Phyb promoted the development of curled leaves. PMID: 23054390
40. Data indicate that the green light (GL) opposition of red light (RL) responses persists in phyA, phyB, cry1cry2 and phot2 mutants, and the response requires phot1 and NPH3. PMID: 23007554
41. PhyA and phyB are involved in the regulation of hypocotyl elongation under red and far-red illumination. PMID: 23456246
42. PhyB inhibits the regulatory activity of PIF1 and PIF3 by releasing them from their DNA targets. PMID: 22849408
43. PhyB functions at all stages of development including seed germination and seedling establishment, mediates classical red/far-red reversible low fluence responses (LFR) as well as red light high irradiance responses. PMID: 22836504
44. Deletion of the RS domain of RRC1 reduces phyB signaling. PMID: 22751357
45. PhyB contributes to the acclimation of plants to open environments by enhancing abscisic acid sensitivity when soil water becomes limiting. PMID: 22553988
46. LRB1 (LIGHT-RESPONSE BTB1) and LRB2 (LIGHT-RESPONSE BTB2) are involved in many developmental processes mediated by phyB and phyD. PMID: 22732244
47. in plants, the phyB/CRY1 interaction may mediate cross-talk between the red/far-red- and blue/UV-sensing pathways, enabling fine-tuning of light responses to different spectral inputs PMID: 22577138
48. Deletion of the RS domain of RRC1 (reduced red-light responses in cry1cry2 background 1), reduces phytochrome B-mediated light responses in a phytochrome B-dependent manner. PMID: 22324426
49. In the dark, cellulose synthase (CESA) complex (CSC) velocity is inhibited through an interaction with microtubules; activation of PHYTOCHROME B overrules it. Analysis of cesa5 mutants shows a role for phosphorylation in the control of CSC velocity. PMID: 22036185
50. The nuclear import of phyB can be facilitated by phytochrome-interacting factor 3 (PIF3). PMID: 22451940

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KEGG: ath:AT2G18790

STRING: 3702.AT2G18790.1

UniGene: At.96