Information report for AA44G00581
Gene Details
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Functional Annotation
- Refseq: XP_002866248.1 — two-component response regulator ARR18 isoform X2
- Swissprot: Q9FGT7 — ARR18_ARATH; Two-component response regulator ARR18
- TrEMBL: D7MPK5 — D7MPK5_ARALL; Two-component response regulator
- STRING: Al_scaffold_0008_2276 — (Arabidopsis lyrata)
- GO:0000160 — Biological Process — phosphorelay signal transduction system
- GO:0009736 — Biological Process — cytokinin-activated signaling pathway
- GO:0003677 — Molecular Function — DNA binding
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.
Literature and News
Gene Resources
Sequences
CDS Sequence:
- >AA44G00581|Aethionema_arabicum|ARR-B|AA44G00581
ATGGAGTTGGTGAATGCTGAAGAGGCAAGGAAAGAGCAGTTTCCTGTAGGGATGCGTGTTCTTGCTGTAGATGATAATCCAACGTGTCTTAGAAAACTCGAGGAATTGCTACTTCGCTGCAAGTATCATGTGACAAAGACAATGGATTCGAAGAAAGCGTTGGAGATGCTAAGAGACAAGAGTAACATGTTTGATCTAGTAATAAGTGATGTTGAGATGCCAGATGTTGATGTGTTGTCTGCACACAGCGACTATGACCATGTCATGAAAGGTATTAGACATGGTGCTTGTGATTATCTGGTTAAACCTGTTGGTCTTAAGGAGCTTAGGAATATTTGGCAACATGTTGTGAGGAAGAACAGTAACTCCCACGCAAAAGCCATTGGCTCTTCTCGCTCATTGCTTCCTCAATCTGATTCCCATCCCTCCTCCAGCGTTAGCAAGAAGAGGAAAGGCTTTAGCCGAGACAAAATCGATGAAAGTGGTGATGGTGATGGTGATGATGATGACAGTGATGGAGAAGAAGAAGATGGTGAGGAGAGTGAACATGATGACGATGATTCATGTTCTAGGAAGAAGCCTCGTGTTGTGTGGGTAGTGGAACTTCACCAGAAGTTTGTAGCGGCCGTTCAGCAATTAGGCCTTGACAAGGCTGTTCCAAAGAAAATACTGGATCTCATGAATGTAGAAGGTCTCACAAGAGAAAACGTAGCCAGCCATTTGCAGAAGTACAGATTATACTTGAAAAAGATGGACGAAAATCAGCATAACATGGCTACAGATGCATATGGGAGAAGAGATTCATCTTACTTACAAATGGCTCAACTTGATGGACTTAGAGACTTTCCTAGCTTAACGGCCACAAGACAACTTCCAAGCTCGACGCTTTTAAACCGTTCCCATCTCACCAAACTCAACCCCTCTCTATGTTCTCCAATAAATCTTCAAGGAATTAACTCCTCCAGCTTCATCCAACAAGGGCATTACGACAACACAAGCAGCAACTCATCTAATTTATTCGGTACGTATCAACATAATCTCTTACCAAGACTCCAGAACACAAATCCGTTCCAACGAACCTCATCTCCGTTAGAAACCATCCAGTTTCCTAGGAATAAGTGTCCTCCATACATGGGAGATTTTAAAACCACACCTGGCAGTAACTTCCTAGATTCTCAGATGTCATTTGGTACCTCTAGCAATTCAAGCAACAGTCTCTTGTTGCAGTCAAACTTTCGGCAACCGCTTCATCGTGGCTCAGATGGAAACCAGTCATGTCCTCCCTCCAGTTCTAGCTCTCCAAACATCAATGGACATATGTTATCTAGATTCCCTAGTCATAACAGAAGCAGCAGCAACAACTGGCAATGGAATCTGAAACCAACCAGATTCCCATCAAGCTCATTACCACTTAACCCTGTTTTTCCTCAGGATCTAGTGACATACGGAGGCAATGCAGGAGATTGCACCTCTTTGGTTTCAGCAGAGAATCCTGGCGGCGAAACCCTGCAATGTGATACTCAATTGCTAGGTGATTTCATTCAGAACATGAACACATTAGAGGAACATAAAGGCACCGTGCTGAATGGTTCATTTGGTAACGTCGACTATCCCCTACCTCTACCTATAGATAACAGTATAACAACACTCAACACTCAACAAGTTTATATGGAGCCAGAGATGAAACCAGAAAAGCCAGAGAATGCTGCTCTTATAGACAATCAGCAAGATGCATTTGATGAGATAATGAACGAGATGATGAAACAGGATGATAACAATGGAATGGGATCAATAGCAGCTAGATTTGGATTTGATTCGTTTCCTCCACCTTTGCCA
Protein Sequence:
- >AA44G00581|Aethionema_arabicum|ARR-B|AA44G00581
MELVNAEEARKEQFPVGMRVLAVDDNPTCLRKLEELLLRCKYHVTKTMDSKKALEMLRDKSNMFDLVISDVEMPDVDVLSAHSDYDHVMKGIRHGACDYLVKPVGLKELRNIWQHVVRKNSNSHAKAIGSSRSLLPQSDSHPSSSVSKKRKGFSRDKIDESGDGDGDDDDSDGEEEDGEESEHDDDDSCSRKKPRVVWVVELHQKFVAAVQQLGLDKAVPKKILDLMNVEGLTRENVASHLQKYRLYLKKMDENQHNMATDAYGRRDSSYLQMAQLDGLRDFPSLTATRQLPSSTLLNRSHLTKLNPSLCSPINLQGINSSSFIQQGHYDNTSSNSSNLFGTYQHNLLPRLQNTNPFQRTSSPLETIQFPRNKCPPYMGDFKTTPGSNFLDSQMSFGTSSNSSNSLLLQSNFRQPLHRGSDGNQSCPPSSSSSPNINGHMLSRFPSHNRSSSNNWQWNLKPTRFPSSSLPLNPVFPQDLVTYGGNAGDCTSLVSAENPGGETLQCDTQLLGDFIQNMNTLEEHKGTVLNGSFGNVDYPLPLPIDNSITTLNTQQVYMEPEMKPEKPENAALIDNQQDAFDEIMNEMMKQDDNNGMGSIAARFGFDSFPPPLP