Plant Transcription factor database - Universität Potsdam
version: 3.0

Arabidopsis thaliana HRT Family

Description

Raventos et al. 1998: A barley gene encoding a novel DNA-binding protein (HRT) was identified by southwestern screening with baits containing a gibberellin phytohormone response element from an alpha-amylase promoter. The HRT gene contains two introns, the larger of which (5722 base pairs (bp)) contains a 3094-bp LINE-like element with homology to maize Colonist1. In vitro mutagenesis and zinc- and DNA-binding assays demonstrate that HRT contains three unusual zinc fingers with a CX8-9CX10CX2H consensus sequence. HRT is targeted to nuclei, and homologues are expressed in other plants. In vivo, functional tests in plant cells indicate that full-length HRT can repress expression from certain promoters including the Amy1/6-4 and Amy2/32 alpha-amylase promoters. In contrast, truncated forms of HRT containing DNA-binding domains can activate, or derepress, transcription from these promoters. Northern hybridizations indicate that HRT mRNA accumulates to low levels in various tissues. Roles for HRT in mediating developmental and phytohormone-responsive gene expression are discussed.

Members of this family
  SHOULD possess HRT domain

Domain alignments

This family is also present in:

References

There are 2 gene models in this family



Gene modelDescriptionDomains
AT4G26170.1 similar to unknown protein [Arabidopsis thaliana] (TAIR:AT5G56780.1); similar to effector of transcription [Brassica napus] (GB:AAT00536.1) HRT
AT5G56780.1 similar to unknown protein [Arabidopsis thaliana] (TAIR:AT5G56770.1); similar to effector of transcription [Brassica napus] (GB:AAT00536.1) HRT

General references

Raventós, D; Skriver, K; Schlein, M; Karnahl, K; Rogers, SW; Rogers, JC; Mundy, J. 1998. HRT, a novel zinc finger, transcriptional repressor from barley. J. Biol. Chem. 273(36):23313-20 PUBMEDID:9722564