PlantTFDB
PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Populus trichocarpa
ARR-B Family
Species TF ID Description
Potri.001G146200.1ARR-B family protein
Potri.001G146200.10ARR-B family protein
Potri.001G146200.11ARR-B family protein
Potri.001G146200.12ARR-B family protein
Potri.001G146200.13ARR-B family protein
Potri.001G146200.14ARR-B family protein
Potri.001G146200.15ARR-B family protein
Potri.001G146200.2ARR-B family protein
Potri.001G146200.3ARR-B family protein
Potri.001G146200.4ARR-B family protein
Potri.001G146200.5ARR-B family protein
Potri.001G146200.6ARR-B family protein
Potri.001G146200.7ARR-B family protein
Potri.001G146200.8ARR-B family protein
Potri.001G146200.9ARR-B family protein
Potri.002G152900.1ARR-B family protein
Potri.002G152900.2ARR-B family protein
Potri.003G087700.1ARR-B family protein
Potri.003G087700.10ARR-B family protein
Potri.003G087700.13ARR-B family protein
Potri.003G087700.14ARR-B family protein
Potri.003G087700.2ARR-B family protein
Potri.003G087700.5ARR-B family protein
Potri.003G087700.6ARR-B family protein
Potri.003G087700.9ARR-B family protein
Potri.006G188000.1ARR-B family protein
Potri.006G262100.1ARR-B family protein
Potri.006G262100.2ARR-B family protein
Potri.006G262100.3ARR-B family protein
Potri.006G262100.4ARR-B family protein
Potri.008G135500.1ARR-B family protein
Potri.008G135500.3ARR-B family protein
Potri.008G181000.1ARR-B family protein
Potri.008G181000.2ARR-B family protein
Potri.008G181000.3ARR-B family protein
Potri.008G181000.4ARR-B family protein
Potri.008G181000.5ARR-B family protein
Potri.008G181000.6ARR-B family protein
Potri.008G181000.7ARR-B family protein
Potri.008G181000.8ARR-B family protein
Potri.008G181000.9ARR-B family protein
Potri.008G213500.1ARR-B family protein
Potri.008G213500.2ARR-B family protein
Potri.010G001000.1ARR-B family protein
Potri.010G001000.2ARR-B family protein
Potri.010G001000.3ARR-B family protein
Potri.010G001000.4ARR-B family protein
Potri.010G001000.5ARR-B family protein
Potri.010G001000.6ARR-B family protein
Potri.010G053100.1ARR-B family protein
Potri.010G105600.1ARR-B family protein
Potri.012G133800.1ARR-B family protein
Potri.012G133800.2ARR-B family protein
Potri.014G077200.1ARR-B family protein
Potri.015G136000.1ARR-B family protein
Potri.018G021300.1ARR-B family protein
Potri.018G021300.2ARR-B family protein
Potri.018G021300.3ARR-B family protein
Potri.018G021300.4ARR-B family protein
Potri.018G021300.5ARR-B family protein
Potri.018G021300.6ARR-B family protein
Potri.018G094700.1ARR-B family protein
Potri.018G111300.1ARR-B family protein
ARR-B Family Introduction

The Arabidopsis genome codes for 22 response regulators (ARRs), 12 of which contain a Myb-like DNA binding domain called ARRM (type B). The remainder (type A) possess no apparent functional unit other than a signal receiver domain containing two aspartate and one lysine residues (DDK) at invariant positions, and their genes are transcriptionally induced by cytokinins without de novo protein synthesis. The type B members, ARR1 and ARR2, bind DNA in a sequence-specific manner and work as transcriptional activators.

Here we present evidence that ARR1 mediates a cytokinin signal, probably through its NH2-terminal signal receiver domain, and transactivates ARR6, which is immediately responsive to cytokinins. A paralogous response regulator, ARR2, shows almost identical characteristics to ARR1, suggesting a functional overlap. Residual cytokinin responses observed with the arr1-1 mutant may have been provided by ARR2. In addition to ARR6, other type A member genes, including ARR4, ARR5, ARR7, ARR8, and ARR9, were also activated by DEX at various levels in 35S::ARR1DDK::GR plants, suggesting that all the immediate cytokinin-responsive genes belonging to this group are directly activated by ARR1. Also, other cytokinin-responsive genes whose promoter regions contain the ARR1 recognition sequences are possibly transactivated by ARR1. A screening for ARR1 target genes using transgenic 35S::ARR1-DDK::GR plants will shed light on the whole view of the early cytokinin signal transduction pathway. We conclude that ARR1 is a principal transcription factor-type response regulator that is involved in an early step of cytokinin signal transduction, possibly as a partner of the sensor histidine kinase CRE1.

Hiroe Sakai, Takashi Honma, Takashi Aoyama, Shusei Sato, Tomohiko Kato, Satoshi Tabata, Atsuhiro Oka
ARR1, a Transcription Factor for Genes Immediately Responsive to Cytokinins
Science, Vol 294, Issue 5546, 1519-1521, 16 November 2001