ID   ORR8_ORYSI              Reviewed;         121 AA.
AC   Q4GZK3;
DT   16-SEP-2015, integrated into UniProtKB/Swiss-Prot.
DT   30-AUG-2005, sequence version 1.
DT   25-MAY-2022, entry version 74.
DE   RecName: Full=Two-component response regulator ORR8 {ECO:0000305};
DE   AltName: Full=Type A response regulator 8 {ECO:0000303|PubMed:16472405};
DE            Short=OsRR8 {ECO:0000303|PubMed:16472405};
GN   Name=RR8 {ECO:0000312|EMBL:CAI79412.1};
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.
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 at low levels in
CC       roots, shoots and flowers. {ECO:0000269|PubMed:16472405}.
CC   -!- INDUCTION: Not induced 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; AJ938077; CAI79412.1; -; mRNA.
DR   AlphaFoldDB; Q4GZK3; -.
DR   SMR; Q4GZK3; -.
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..121
FT                   /note="Two-component response regulator ORR8"
FT                   /id="PRO_0000433831"
FT   DOMAIN          5..121
FT                   /note="Response regulatory"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00169"
FT   MOD_RES         55
FT                   /note="4-aspartylphosphate"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00169"
SQ   SEQUENCE   121 AA;  13675 MW;  36D0A7F68C4C7A1E CRC64;
     MSSPHVLVVD DTHVDRHVVS MALMRHNVRV TAVESVMQAL MFLDSEHDVD MIVSDYCMPD
     MTGYNLLMEV KKSPKLAHLP VVIASSDNIP ERIRKCLDGG AKDYILKPVK IVDVPRIMKY
     I