Diversity of cis-regulatory elements associated with auxin response in Arabidopsis thaliana.

Diversity of cis-regulatory elements associated with auxin response in Arabidopsis thaliana.
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DOI:
10.1093/jxb/erx254
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发表时间:
2018-01-04
影响因子:
6.9
通讯作者:
Mironova V
Mironova V
中科院分区:
生物学1区
文献类型:
--
作者:
Cherenkov P;Novikova D;Omelyanchuk N;Levitsky V;Grosse I;Weijers D;Mironova V

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Meta-analysis of auxin-responsive transcriptome data identified both known and novel cis-regulatory elements associated with specific response modes. The phytohormone auxin regulates virtually every developmental process in land plants. This regulation is mediated via de-repression of DNA-binding auxin response factors (ARFs). ARFs bind TGTC-containing auxin response cis-elements (AuxREs), but there is growing evidence that additional cis-elements occur in auxin-responsive regulatory regions. The repertoire of auxin-related cis-elements and their involvement in different modes of auxin response are not yet known. Here we analyze the enrichment of nucleotide hexamers in upstream regions of auxin-responsive genes associated with auxin up- or down-regulation, with early or late response, ARF-binding domains, and with different chromatin states. Intriguingly, hexamers potentially bound by basic helix–loop–helix (bHLH) and basic leucine zipper (bZIP) factors as well as a family of A/T-rich hexamers are more highly enriched in auxin-responsive regions than canonical TGTC-containing AuxREs. We classify and annotate the whole spectrum of enriched hexamers and discuss their patterns of enrichment related to different modes of auxin response.
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