ABA INSENSITIVE 5 (ABI5) is a basic leucine zipper (bZIP) transcription factor which acts in the abscisic acid (ABA) network and is activated in response to abiotic stresses. However, the precise role of barley (Hordeum vulgare) ABI5 in ABA signaling and its function under stress remains elusive.

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1 Publication Moreover, ABI5 also acts as an ABA and other phytohormone signaling integrator. Components of auxin, cytokinin, gibberellic acid, jasmonate and brassinosteroid signaling and metabolism pathways were shown to take part in ABI5 regulation and/or to be regulated by ABI5. Monocot orthologs of AtABI5 have been identified. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Using an ABI5::GUS fusion gene under the control of ABI5 promoter sequences, we have shown that ABI5 is constitutively localized in the nucleus in the presence or absence of ABA .

Abi5

In our 2021年1月10日 Additionally, WRKY40 represses the transcriptional activation activity of HY5, which can activate ABI5 expression by directly binding to its Plant bZIP transcriptional factor ABI5 is a key regulator in ABA signaling. •. Four post-translational modifications jointly regulate ABI5 activity. •. Phosphorylation 27 Mar 2021 Comparison of seed and ABA-inducible vegetative gene expression in wild-type and abi5-1 plants indicates that ABI5 regulates a subset of late 5 Nis 2021 EKREM ABİ - 5 NİSAN 2021 - CANLI YAYIN TEKRARI. 8,321 views8.3K views.

ABI5 can also be regulated at the posttranscriptional level. The accumulated ABI5 protein further shows heteromeric interaction with HY5, and thus synergistically activates its own expression.

Consistently, PIFs and the G-box motifs in the ABI5 promoter determine ABI5 expression in darkness, and overexpression of ABI5 could rescue the ABA-insensitive phenotypes of pifq mutants in the dark. Moreover, we discovered that PIFs can physically interact with the ABA receptors PYL8 and PYL9, and that this interaction is not regulated by ABA.

The accumulated ABI5 protein further shows heteromeric interaction with HY5, and thus synergistically activates its own expression. Our findings reveal a novel transcriptional switch, composed of JMJ17–WRKY40 and HY5–ABI5 modules, which regulates the ABA response during seed germination and seedling development in Arabidopsis.

ABI5 interacts with other phytohormone signals to regulate plant growth and development, and stress responses in Arabidopsis, but little is known about the functions of ABI5 in potatoes. Here, we find that StABI5 is involved in the regulation of chloroplast development and photosynthesis. BioGRID Interaction 332630 Between ABI5 And ABI3. Toggle navigation. Bio GRID 4.3 BioGRID Interaction 818008 Between ABI5 And FYPP3. Toggle navigation. Bio GRID 4.3 In addition, ABI5 was shown to directly activate its own expression, whereas BBX21 negatively regulates this activity by directly interacting with ABI5.

Background ABI5 (abscisic acid insensitive 5) is involved in ABA-regulated gene expression during seed development and subsequent vegetative stage and acts as the major mediator of … The Arabidopsis abscisic acid response gene ABI5 encodes a basic leucine zipper transcription factor. The Arabidopsis abscisic acid (ABA)-insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination … 2020-11-07 2019-02-01 2020-03-24 2020-03-24 2015-10-23 2020-03-02 2014-06-18 However, ABI5 was found to modulate the PYL11‐ and PYL12‐mediated ABA response. In the abi5‐7 mutant, ABA hypersensitivity caused by PYL11 and PYL12 overexpression was totally or partially blocked. By contrast, ABI5 regulates the expression of PYL11 and PYL12 by directly binding to their promoters.
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protein abscisic acid-insensitive 5. GO Process (11) GO Function (3) GO Component (1) Gene Ontology Biological Process. negative regulation of seed germination ; positive … 2008-01-31 In addition, ABI5 was shown to directly activate its own expression, whereas BBX21 negatively regulates this activity by directly interacting with ABI5.

However, the precise role of barley (Hordeum vulgare) ABI5 in ABA signaling and its function under stress remains elusive.
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In addition, ABI5 was shown to directly activate its own expression, whereas BBX21 negatively regulates this activity by directly interacting with ABI5. Together, our study indicates that BBX21 coordinates with HY5 and ABI5 on the ABI5 promoter and that these transcriptional regulators work in concert to integrate light and ABA signaling in Arabidopsis thaliana.

Its stability or degradation plays a central role in abscisic acid response. Sumoylated at Lys-391 by SIZ1. Sumoylation protects ABI5 from proteasome degradation, attenuating ABA signaling and sensitivity to ABA. 1 Publication Plants silencing ABI5 exhibit low fertility rate due to abnormal development of mature pollen. Plants silencing ABI5 display increased tolerance to salt stress. 1 Publication Moreover, ABI5 also acts as an ABA and other phytohormone signaling integrator.

2019-02-01

Additionally, the stability and activity of ABI5 are also regulated by other proteins through post-translational modiﬁcations such as ABA Insensitive 5 (ABI5) is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early seedling growth in the presence of ABA and abiotic 2014-02-27 ABA, a phytohormone that regulates the different stages of plant growth and development, is an important factor in the interactions of plants with their environment. Over the past 20 years, the individual steps of the ABA signaling pathway have been dissected, from signal perception to the nuclear action of downstream gene regulation [1].

This suggests that nucleo‐cytoplasmic shuttling may not be a major regulatory step in ABI5 activity. Sumoylation of ABI5 by the ArabidopsisSUMO E3 ligase SIZ1 negatively regulates abscisic acid signaling Kenji Miuraa,b,1, Jiyoung Leec,2, Jing Bo Jina,3, Chan Yul Yooa, Tomoko Miuraa, and Paul M. Hasegawaa,1 We used abi5-4 lines expressing the 35S∷ABI5 transgene (abi5-4/35S∷ABI5) to investigate the relationship between protein accumulation and the extent of growth arrest in response to ABA. Fig. 5D shows that abi5-4/35S∷ABI5 transgenic lines expressing intermediate ABI5 levels also displayed an intermediate phenotype in the presence of ABA. 2008-01-31 · It has been suggested that ABI5 plays a role in protecting germinating embryos from drought, and ABI5 is regulated by ABA during germination (Lopez-Molina et al. 2001). Based on the complementation experiments and the similar phenotype of over-expression transgenic lines, we propose that OsABI5 has a similar function to AtABI5 in the ABA signal pathway.