Beyond YABBYs: a Focus on Versatility and Interactivity
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Beyond YABBYs: a Focus on Versatility and Interactivity Bruna Rafaella Zanardi Palermo 1 & Marcelo Carnier Dornelas 1 Received: 4 August 2020 / Accepted: 10 November 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The YABBY gene family encodes small plant-specific transcription factors. The first function described for these genes was their role in the establishment and equilibrium of the adaxial-abaxial axes in lateral organs of angiosperms, which includes leaves and leaf-derived organs, such as sepals, petals, stamens, and carpels, and specific floral organs such as ovule integuments and nectaries. From these discoveries, more studies investigating the participation of YABBY genes in other mechanisms of development and in maintenance of the life cycle of plants began to arise. The roles of YABBY genes in hormone biosynthesis and in the production of secondary metabolites were brought to light in addition to their contribution to the evolutionary history of the leaf blade and floral organs. The proteins of the YABBY family directly regulate the transcription of target genes or they are involved with protein-protein interactions that modulate the functions of other proteins. This review will approach some of the various functions performed by the YABBY family members, focusing on how diverse are the molecular pathways these transcription factors interact with. The wide range of these different interactions is an important aspect that directly contributes to the versatility of this family of transcription factors. Keywords Gibberellin biosynthesis pathway . Leaf development . Protein-protein interaction . Secondary metabolite . Transcription factor
Abbreviations AFO ABNORMAL FLORAL ORGANS AG AGAMOUS ARF AUXIN RESPONSE FACTOR DMAPP dimethylallyl diphosphate EST expressed sequence tag HMG-box high mobility group box CRC CRABS CLAW FIL FILAMENTOUS FLOWER GA gibberellic acid INO INNER NO OUTER IPP isopentenyl diphosphate KAN KANADI MEP 2- C-methyl-D-erythritol 4-phosphate pathway MVA mevalonate pathway NZZ NOZZLE PGT peltate glandular trichomes Communicated by: Graham Bonnett. * Marcelo Carnier Dornelas [email protected] 1
Instituto de Biologia, Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Rua Monteiro Lobato, 255, CEP 13.083-862 Campinas, SP, Brazil
SAM SPL YAB1 YAB2 YAB3 YAB4 YAB5 WUS
shoot apical meristem SPOROCYTELESS YABBY1 YABBY2 YABBY3 YABBY4 YABBY5 WUSCHEL
Introduction The YABBY gene family is specific to seed plants and encode a class of small transcription factors with two conserved domains: a C2C2 zinc-finger domain and a helix-loop-helix domain (YABBY domain) with sequences similar to the first two helices of the HMG-box motif (High Mobility Group box), responsible for the binding of transcription factors to DNA (Golz and Hudson 1999; Siegfried et al. 1999; Bowman 2000a). These genes are found in the angiosperms and gymnosperms and the evolutionary history of this family coincides with the origin of seed plants (Sarojam et al. 2010). These tr
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