ID   ORR2_ORYSI              Reviewed;         252 AA.
AC   Q4GZK9;
DT   16-SEP-2015, integrated into UniProtKB/Swiss-Prot.
DT   30-AUG-2005, sequence version 1.
DT   25-MAY-2022, entry version 75.
DE   RecName: Full=Two-component response regulator ORR2 {ECO:0000305};
DE   AltName: Full=Type A response regulator 2 {ECO:0000303|PubMed:16472405};
DE            Short=OsRR2 {ECO:0000303|PubMed:16472405};
GN   Name=RR2 {ECO:0000312|EMBL:CAI79406.1};
OS   Oryza sativa subsp. indica (Rice).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC   Oryzoideae; Oryzeae; Oryzinae; Oryza; Oryza sativa.
OX   NCBI_TaxID=39946;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], TISSUE SPECIFICITY, AND INDUCTION BY CYTOKININ.
RC   STRAIN=cv. Pusa Basmati;
RX   PubMed=16472405; DOI=10.1186/1471-2229-6-1;
RA   Jain M., Tyagi A.K., Khurana J.P.;
RT   "Molecular characterization and differential expression of cytokinin-
RT   responsive type-A response regulators in rice (Oryza sativa).";
RL   BMC Plant Biol. 6:1-1(2006).
CC   -!- FUNCTION: Functions as response regulator involved in His-to-Asp
CC       phosphorelay signal transduction system. Phosphorylation of the Asp
CC       residue in the receiver domain activates the ability of the protein to
CC       promote the transcription of target genes. Type-A response regulators
CC       seem to act as negative regulators of the cytokinin signaling.
CC       {ECO:0000250|UniProtKB:Q9ZWS9}.
CC   -!- TISSUE SPECIFICITY: Expressed in mature leaves and flowers, and at low
CC       levels in roots and shoots. {ECO:0000269|PubMed:16472405}.
CC   -!- INDUCTION: By cytokinin. {ECO:0000269|PubMed:16472405}.
CC   -!- PTM: Two-component system major event consists of a His-to-Asp
CC       phosphorelay between a sensor histidine kinase (HK) and a response
CC       regulator (RR). In plants, the His-to-Asp phosphorelay involves an
CC       additional intermediate named Histidine-containing phosphotransfer
CC       protein (HPt). This multistep phosphorelay consists of a His-Asp-His-
CC       Asp sequential transfer of a phosphate group between first an His and
CC       an Asp of the HK protein, followed by the transfer to a conserved His
CC       of the HPt protein and finally the transfer to an Asp in the receiver
CC       domain of the RR protein. {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the ARR family. Type-A subfamily. {ECO:0000305}.
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DR   EMBL; AJ938071; CAI79406.1; -; mRNA.
DR   AlphaFoldDB; Q4GZK9; -.
DR   SMR; Q4GZK9; -.
DR   GO; GO:0009736; P:cytokinin-activated signaling pathway; IEA:UniProtKB-KW.
DR   GO; GO:0000160; P:phosphorelay signal transduction system; IEA:UniProtKB-KW.
DR   GO; GO:0009735; P:response to cytokinin; IC:Gramene.
DR   InterPro; IPR045279; ARR-like.
DR   InterPro; IPR011006; CheY-like_superfamily.
DR   InterPro; IPR001789; Sig_transdc_resp-reg_receiver.
DR   PANTHER; PTHR43874; PTHR43874; 1.
DR   Pfam; PF00072; Response_reg; 1.
DR   SMART; SM00448; REC; 1.
DR   SUPFAM; SSF52172; SSF52172; 1.
DR   PROSITE; PS50110; RESPONSE_REGULATORY; 1.
PE   2: Evidence at transcript level;
KW   Cytokinin signaling pathway; Phosphoprotein; Transcription;
KW   Transcription regulation; Two-component regulatory system.
FT   CHAIN           1..252
FT                   /note="Two-component response regulator ORR2"
FT                   /id="PRO_0000433819"
FT   DOMAIN          7..157
FT                   /note="Response regulatory"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00169"
FT   MOD_RES         90
FT                   /note="4-aspartylphosphate"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00169"
SQ   SEQUENCE   252 AA;  26856 MW;  99527CE2B42987A5 CRC64;
     MGAEAVRVLV VDDSPVDRRV VELLLRAHCG GGGGAAAGEA APFHVTAVDS GKKAMELLGR
     RRGDRDHLTP SSPAAAAAAN DQAIDIVLTD YCMPEMTGYD LLKAIKALGS PNPIPVVVMS
     SENEPQRISR CLTAGAEDFI LKPLKMNDVQ RLRKCSGATR PKSAVAGDDD RCCNTAKKAA
     AAAAATPEQQ QQQQRSSHLA GLAMVMNASS FEVSHYFQLI FKLILLAYAV LCLSQLLHRW
     SNGSSLLSLW CA