PlantRegMap/PlantTFDB v5.0
Plant Transcription
Factor Database
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Home TFext BLAST Prediction Download Help About Links PlantRegMap |
Species | TF ID | Description |
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Coffea arabica (44) | XP_027066545.1 | ARR-B family protein |
XP_027067929.1 | ARR-B family protein | |
XP_027067930.1 | ARR-B family protein | |
XP_027070314.1 | ARR-B family protein | |
XP_027070315.1 | ARR-B family protein | |
XP_027075878.1 | ARR-B family protein | |
XP_027080696.1 | ARR-B family protein | |
XP_027080697.1 | ARR-B family protein | |
XP_027080698.1 | ARR-B family protein | |
XP_027080699.1 | ARR-B family protein | |
XP_027080700.1 | ARR-B family protein | |
XP_027080701.1 | ARR-B family protein | |
XP_027080702.1 | ARR-B family protein | |
XP_027080703.1 | ARR-B family protein | |
XP_027080704.1 | ARR-B family protein | |
XP_027080705.1 | ARR-B family protein | |
XP_027080706.1 | ARR-B family protein | |
XP_027080708.1 | ARR-B family protein | |
XP_027084071.1 | ARR-B family protein | |
XP_027084072.1 | ARR-B family protein | |
XP_027084073.1 | ARR-B family protein | |
XP_027084074.1 | ARR-B family protein | |
XP_027084075.1 | ARR-B family protein | |
XP_027084076.1 | ARR-B family protein | |
XP_027084077.1 | ARR-B family protein | |
XP_027084079.1 | ARR-B family protein | |
XP_027084080.1 | ARR-B family protein | |
XP_027084081.1 | ARR-B family protein | |
XP_027084082.1 | ARR-B family protein | |
XP_027096467.1 | ARR-B family protein | |
XP_027096468.1 | ARR-B family protein | |
XP_027096469.1 | ARR-B family protein | |
XP_027097499.1 | ARR-B family protein | |
XP_027099288.1 | ARR-B family protein | |
XP_027099453.1 | ARR-B family protein | |
XP_027099454.1 | ARR-B family protein | |
XP_027099993.1 | ARR-B family protein | |
XP_027099994.1 | ARR-B family protein | |
XP_027099995.1 | ARR-B family protein | |
XP_027100212.1 | ARR-B family protein | |
XP_027109366.1 | ARR-B family protein | |
XP_027115945.1 | ARR-B family protein | |
XP_027121030.1 | ARR-B family protein | |
XP_027122286.1 | ARR-B family protein |
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