Auxin response factors
| Autor: | John William Chandler |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Physiology Activator (genetics) fungi food and beverages Repressor Promoter Plant Science Biology Bioinformatics Chromatin Cell biology 03 medical and health sciences 030104 developmental biology chemistry Auxin Transcriptional regulation heterocyclic compounds Transcription factor Psychological repression |
| Zdroj: | Plant, Cell & Environment. 39:1014-1028 |
| ISSN: | 0140-7791 |
| Popis: | Auxin signalling involves the activation or repression of gene expression by a class of auxin response factor (ARF) proteins that bind to auxin response elements in auxin-responsive gene promoters. The release of ARF repression in the presence of auxin by the degradation of their cognate auxin/indole-3-acetic acid repressors forms a paradigm of transcriptional response to auxin. However, this mechanism only applies to activating ARFs, and further layers of complexity of ARF function and regulation are being revealed, which partly reflect their highly modular domain structure. This review summarizes our knowledge concerning ARF binding site specificity, homodimer and heterodimer multimeric ARF association and cooperative function and how activator ARFs activate target genes via chromatin remodelling and evolutionary information derived from phylogenetic comparisons from ARFs from diverse species. ARFs are regulated in diverse ways, and their importance in non-auxin-regulated pathways is becoming evident. They are also embedded within higher-order transcription factor complexes that integrate signalling pathways from other hormones and in response to the environment. The ways in which new information concerning ARFs on many levels is causing a revision of existing paradigms of auxin response are discussed. |
| Databáze: | OpenAIRE |
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