Determinants of PB1 Domain Interactions in Auxin Response Factor ARF5 and Repressor IAA17

Kim, Youngim; Park, Changkon; Cha, Soyoung; Han, Mookyoung; Ryu, Kyoung‐Seok; Suh, Jeong‐Yong

doi:10.1016/j.jmb.2020.04.007

Cited by 19 publications

(14 citation statements)

References 30 publications

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“…DIII/IV are also present in Aux/IAA proteins (Kim et al ., 1997; Ulmasov et al ., 1997; Ouellet et al ., 2001; Guilfoyle, 2015). Resolution of the 3D structures of ARFs and Aux/IAA DIII/IV (AtARF5 (Nanao et al ., 2014); AtARF7 (Korasick et al ., 2014; Kim et al ., 2020); AtAux/IAA17 (Han et al ., 2014; Kim et al ., 2020); and Pisum sativum Aux/IAA4 (Dinesh et al ., 2015)) revealed that these two domains actually fold into one single Phox and Bem1 (PB1) domain (Guilfoyle & Hagen, 2012; Nanao et al ., 2014). PB1 domains are also present in fungi, animals and amoeba and in several protein families in plants.…”

Section: Structure and Function Of Auxin Response Factor Domainsmentioning

confidence: 99%

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Auxin response factors are keys to the many auxin doors

et al. 2022

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Summary In plants, most developmental programs depend on the action of auxin. The best described model of the auxin signaling pathway, which explains most, but not all, of the auxin transcriptional responses, relies on a de‐repression mechanism. The auxin/indole‐3‐acetic acid repressors (Aux/IAAs) interact with the auxin response factors (ARFs), the transcription factors of the auxin signaling pathway, leading to repression of the ARF‐controlled genes. Auxin induces Aux/IAA degradation, releases ARFs and activates transcription. However, this elegant model is not suitable for all ARFs. Indeed, in Arabidopsis, which has 22 ARFs, only five of them fit into the model since they are the ones able to interact with Aux/IAAs. The remaining 17 have a limited capacity to interact with the repressors, and their mechanisms of action are still unclear. The differential interactions between ARF and Aux/IAA proteins constitute one of many examples of the biochemical and structural diversification of ARFs that affect their action and therefore affect auxin transcriptional responses. A deeper understanding of the structural properties of ARFs is fundamental to obtaining a better explanation of the action of auxin in plants.

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Section: Structure and Function Of Auxin Response Factor Domainsmentioning

confidence: 99%

“…However, heterotypic interactions are stronger than ARF or Aux/IAA homotypic interactions. This is explained by a higher number of electrostatic bonds between ARF and Aux/IAA‐PB1s (Han et al ., 2014; Korasick et al ., 2015; Parcy et al ., 2016; Kim et al ., 2020).…”

Section: Structure and Function Of Auxin Response Factor Domainsmentioning

confidence: 99%

Auxin response factors are keys to the many auxin doors

et al. 2022

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“…As a result, several SCF TIR1 substrates, such as AUXIN RESISTANT 3 (AXR3), are miss-regulated in the alf4 mutants and this might explain the auxin-related phenotypes of alf4 seedlings [ 5 ]. AXR3 physically interacts with MONOPTEROS, also known as AUXIN RESPONSE FACTOR 5 (ARF5), and the resulting AXR3-ARF5 complex functions as a transcriptional repressor at low auxin levels [ 6 ], which has also been shown to control plant stem cell maintenance and differentiation during embryogenesis [ 7 ].…”

Section: Transcription Factor Network and Epigenetic Regulators Dmentioning

confidence: 99%

Advances in Plant Regeneration: Shake, Rattle and Roll

Ibáñez

Carneros

Testillano

et al. 2020

Plants

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Some plant cells are able to rebuild new organs after tissue damage or in response to definite stress treatments and/or exogenous hormone applications. Whole plants can develop through de novo organogenesis or somatic embryogenesis. Recent findings have enlarged our understanding of the molecular and cellular mechanisms required for tissue reprogramming during plant regeneration. Genetic analyses also suggest the key role of epigenetic regulation during de novo plant organogenesis. A deeper understanding of plant regeneration might help us to enhance tissue culture optimization, with multiple applications in plant micropropagation and green biotechnology. In this review, we will provide additional insights into the physiological and molecular framework of plant regeneration, including both direct and indirect de novo organ formation and somatic embryogenesis, and we will discuss the key role of intrinsic and extrinsic constraints for cell reprogramming during plant regeneration.

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“…In the process of C. oleifera seed development, the expression level of YUC4 was 1724-fold in T1 compared with T5, and its significant downregulation may be related to the accumulation of auxin. AUX/IAA and ARF suppress and regulate auxin signal transduction [ 57 ]. Among them, IAA14 was involved in the formation of Arabidopsis lateral roots [ 58 ] and IAA17 control tomato fruit size via the regulation of cell size [ 59 ].…”

Section: Discussionmentioning

confidence: 99%

Hormone analysis and candidate genes identification associated with seed size in Camellia oleifera

Song

et al. 2022

R. Soc. open sci.

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Camellia oleifera is an important woody oil species in China. Its seed oil has been widely used as a cooking oil. Seed size is a crucial factor influencing the yield of seed oil. In this study, the horizontal diameter, vertical diameter and volume of C. oleifera seeds showed a rapid growth tendency from 235 days after pollination (DAP) to 258 DAP but had a slight increase at seed maturity. During seed development, the expression of genes related to cell proliferation and expansion differ greatly. Auxin plays an important role in C. oleifera seeds; YUC4 and IAA17 were significantly downregulated. Weighted gene co-expression network analysis screened 21 hub transcription factors for C. oleifera seed horizontal diameter, vertical diameter and volume. Among them, SPL4 was significantly decreased and associated with all these three traits, while ABI4 and YAB1 were significantly increased and associated with horizontal diameter of C. oleifera seeds. Additionally, KLU significantly decreased (2040-fold). Collectively, our data advances the knowledge of factors related to seed size and provides a theoretical basis for improving the yield of C. oleifera seeds.

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Determinants of PB1 Domain Interactions in Auxin Response Factor ARF5 and Repressor IAA17

Cited by 19 publications

References 30 publications

Auxin response factors are keys to the many auxin doors

Auxin response factors are keys to the many auxin doors

Advances in Plant Regeneration: Shake, Rattle and Roll

Hormone analysis and candidate genes identification associated with seed size in Camellia oleifera

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