Gene Details:

• Gene ID: KN538739.1_FGP010
• Gene Family: ARR-B Family
• Description: ARR-B Family protein
• Species: Oryza longistaminata
• Source: ARR-B family gene from PlantTFDB

Protein Features:

• SuperFamily:  SSF52172
• Gene3D:  G3DSA:3.40.50.2300
• SMART:  SM00448
• PROSITE profile:  PS50110
• Pfam:  PF00072
• SuperFamily:  SSF46689
• Gene3D:  G3DSA:1.10.10.60
• TIGRFAMs:  TIGR01557
• Pfam:  PF00249
• InterPro:  IPR011006    IPR001789    IPR009057    IPR006447    IPR001005

Annotation Proteins:

• Refseq:  XP_015630577.1  — two-component response regulator ORR21
• Refseq:  XP_015630578.1  — two-component response regulator ORR21
• Swissprot:  A2XE31  — ORR21_ORYSI; Two-component response regulator ORR21
• TrEMBL:  A0A0D9Z463  — A0A0D9Z463_9ORYZ; Two-component response regulator
• TrEMBL:  A0A0E0HJZ6  — A0A0E0HJZ6_ORYNI; Two-component response regulator
• TrEMBL:  A0A0E0NRU5  — A0A0E0NRU5_ORYRU; Two-component response regulator
• TrEMBL:  I1P922  — I1P922_ORYGL; Two-component response regulator
• STRING:  OGLUM03G09080.1  — (Oryza glumipatula)
• STRING:  ORUFI03G09090.1  — (Oryza rufipogon)
• STRING:  ONIVA06G01160.1  — (Oryza nivara)
• STRING:  ORGLA03G0086800.1  — (Oryza glaberrima)

Gene Ontology:

• GO:0009873  — Biological Process — ethylene-activated signaling pathway
• GO:0010082  — Biological Process — regulation of root meristem growth
• GO:0010119  — Biological Process — regulation of stomatal movement
• GO:0010150  — Biological Process — leaf senescence
• GO:0071368  — Biological Process — cellular response to cytokinin stimulus
• GO:0080113  — Biological Process — regulation of seed growth
• GO:0005634  — Cellular Component — nucleus
• GO:0003677  — Molecular Function — DNA binding
• GO:0003700  — Molecular Function — transcription factor activity, sequence-specific 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:

• ARR1, a Transcription Factor for Genes Immediately Responsive to Cytokinins.   DOI:  10.1126/science.1065201 ;  PMID:  11691951

Sequences: