ID   PYRR_CLOD6              Reviewed;         177 AA.
AC   Q182T5;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   25-JUL-2006, sequence version 1.
DT   03-AUG-2022, entry version 93.
DE   RecName: Full=Bifunctional protein PyrR {ECO:0000255|HAMAP-Rule:MF_01219};
DE   Includes:
DE     RecName: Full=Pyrimidine operon regulatory protein {ECO:0000255|HAMAP-Rule:MF_01219};
DE   Includes:
DE     RecName: Full=Uracil phosphoribosyltransferase {ECO:0000255|HAMAP-Rule:MF_01219};
DE              Short=UPRTase {ECO:0000255|HAMAP-Rule:MF_01219};
DE              EC=2.4.2.9 {ECO:0000255|HAMAP-Rule:MF_01219};
GN   Name=pyrR {ECO:0000255|HAMAP-Rule:MF_01219}; OrderedLocusNames=CD630_25950;
OS   Clostridioides difficile (strain 630) (Peptoclostridium difficile).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Peptostreptococcaceae;
OC   Clostridioides.
OX   NCBI_TaxID=272563;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=630;
RX   PubMed=16804543; DOI=10.1038/ng1830;
RA   Sebaihia M., Wren B.W., Mullany P., Fairweather N.F., Minton N.,
RA   Stabler R., Thomson N.R., Roberts A.P., Cerdeno-Tarraga A.M., Wang H.,
RA   Holden M.T.G., Wright A., Churcher C., Quail M.A., Baker S., Bason N.,
RA   Brooks K., Chillingworth T., Cronin A., Davis P., Dowd L., Fraser A.,
RA   Feltwell T., Hance Z., Holroyd S., Jagels K., Moule S., Mungall K.,
RA   Price C., Rabbinowitsch E., Sharp S., Simmonds M., Stevens K., Unwin L.,
RA   Whithead S., Dupuy B., Dougan G., Barrell B., Parkhill J.;
RT   "The multidrug-resistant human pathogen Clostridium difficile has a highly
RT   mobile, mosaic genome.";
RL   Nat. Genet. 38:779-786(2006).
CC   -!- FUNCTION: Regulates transcriptional attenuation of the pyrimidine
CC       nucleotide (pyr) operon by binding in a uridine-dependent manner to
CC       specific sites on pyr mRNA. This disrupts an antiterminator hairpin in
CC       the RNA and favors formation of a downstream transcription terminator,
CC       leading to a reduced expression of downstream genes.
CC       {ECO:0000255|HAMAP-Rule:MF_01219}.
CC   -!- FUNCTION: Also displays a weak uracil phosphoribosyltransferase
CC       activity which is not physiologically significant. {ECO:0000255|HAMAP-
CC       Rule:MF_01219}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=diphosphate + UMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC         uracil; Xref=Rhea:RHEA:13017, ChEBI:CHEBI:17568, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:57865, ChEBI:CHEBI:58017; EC=2.4.2.9;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01219};
CC   -!- SUBUNIT: Homodimer and homohexamer; in equilibrium. {ECO:0000255|HAMAP-
CC       Rule:MF_01219}.
CC   -!- SIMILARITY: Belongs to the purine/pyrimidine phosphoribosyltransferase
CC       family. PyrR subfamily. {ECO:0000255|HAMAP-Rule:MF_01219}.
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DR   EMBL; AM180355; CAJ69485.1; -; Genomic_DNA.
DR   RefSeq; WP_003431186.1; NZ_CP010905.2.
DR   RefSeq; YP_001089112.1; NC_009089.1.
DR   AlphaFoldDB; Q182T5; -.
DR   SMR; Q182T5; -.
DR   STRING; 272563.CD630_25950; -.
DR   PRIDE; Q182T5; -.
DR   EnsemblBacteria; CAJ69485; CAJ69485; CD630_25950.
DR   GeneID; 66354996; -.
DR   KEGG; cdf:CD630_25950; -.
DR   KEGG; pdc:CDIF630_02849; -.
DR   PATRIC; fig|272563.120.peg.2737; -.
DR   eggNOG; COG2065; Bacteria.
DR   OMA; PIQPDFC; -.
DR   PhylomeDB; Q182T5; -.
DR   BioCyc; PDIF272563:G12WB-2752-MON; -.
DR   Proteomes; UP000001978; Chromosome.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004845; F:uracil phosphoribosyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006353; P:DNA-templated transcription, termination; IEA:UniProtKB-UniRule.
DR   CDD; cd06223; PRTases_typeI; 1.
DR   Gene3D; 3.40.50.2020; -; 1.
DR   HAMAP; MF_01219; PyrR; 1.
DR   InterPro; IPR000836; PRibTrfase_dom.
DR   InterPro; IPR029057; PRTase-like.
DR   InterPro; IPR023050; PyrR.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   SUPFAM; SSF53271; SSF53271; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase; Reference proteome; RNA-binding; Transcription;
KW   Transcription regulation; Transcription termination; Transferase.
FT   CHAIN           1..177
FT                   /note="Bifunctional protein PyrR"
FT                   /id="PRO_1000053827"
FT   MOTIF           99..111
FT                   /note="PRPP-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01219"
SQ   SEQUENCE   177 AA;  19761 MW;  A0588FE71A668507 CRC64;
     MVEKAQLMDE KAIARAITRI SHEIIERNKG VENLVLVGIK TRGVPIANRI SKKIEQIEGT
     KVDTGDIDIT LYRDDLEKIH VEPVVKGTYL DFNVNDKTVV LVDDVLYTGR TVRASLDAII
     DIGRPKSIQL AVLVDRGHRE LPIRADYVGK NVPTSRHEII SVSLLEIDGE DSVTIKE