ID   PYRE_CHLP8              Reviewed;         193 AA.
AC   B3QLE2;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 1.
DT   28-JAN-2026, entry version 82.
DE   RecName: Full=Orotate phosphoribosyltransferase {ECO:0000255|HAMAP-Rule:MF_01208};
DE            Short=OPRT {ECO:0000255|HAMAP-Rule:MF_01208};
DE            Short=OPRTase {ECO:0000255|HAMAP-Rule:MF_01208};
DE            EC=2.4.2.10 {ECO:0000255|HAMAP-Rule:MF_01208};
GN   Name=pyrE {ECO:0000255|HAMAP-Rule:MF_01208};
GN   OrderedLocusNames=Cpar_1991;
OS   Chlorobaculum parvum (strain DSM 263 / NCIMB 8327) (Chlorobium vibrioforme
OS   subsp. thiosulfatophilum).
OC   Bacteria; Pseudomonadati; Chlorobiota; Chlorobiia; Chlorobiales;
OC   Chlorobiaceae; Chlorobaculum.
OX   NCBI_TaxID=517417;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 263 / NCIMB 8327;
RG   US DOE Joint Genome Institute;
RA   Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Schmutz J., Larimer F., Land M.,
RA   Hauser L., Kyrpides N., Mikhailova N., Zhao F., Li T., Liu Z., Overmann J.,
RA   Bryant D.A., Richardson P.;
RT   "Complete sequence of Chlorobaculum parvum NCIB 8327.";
RL   Submitted (JUN-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the transfer of a ribosyl phosphate group from 5-
CC       phosphoribose 1-diphosphate to orotate, leading to the formation of
CC       orotidine monophosphate (OMP). {ECO:0000255|HAMAP-Rule:MF_01208}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=orotidine 5'-phosphate + diphosphate = orotate + 5-phospho-
CC         alpha-D-ribose 1-diphosphate; Xref=Rhea:RHEA:10380,
CC         ChEBI:CHEBI:30839, ChEBI:CHEBI:33019, ChEBI:CHEBI:57538,
CC         ChEBI:CHEBI:58017; EC=2.4.2.10; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01208};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01208};
CC   -!- PATHWAY: Pyrimidine metabolism; UMP biosynthesis via de novo pathway;
CC       UMP from orotate: step 1/2. {ECO:0000255|HAMAP-Rule:MF_01208}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01208}.
CC   -!- SIMILARITY: Belongs to the purine/pyrimidine phosphoribosyltransferase
CC       family. PyrE subfamily. {ECO:0000255|HAMAP-Rule:MF_01208}.
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DR   EMBL; CP001099; ACF12380.1; -; Genomic_DNA.
DR   RefSeq; WP_012503213.1; NC_011027.1.
DR   AlphaFoldDB; B3QLE2; -.
DR   SMR; B3QLE2; -.
DR   STRING; 517417.Cpar_1991; -.
DR   KEGG; cpc:Cpar_1991; -.
DR   eggNOG; COG0461; Bacteria.
DR   HOGENOM; CLU_074878_3_0_10; -.
DR   OrthoDB; 9783570at2; -.
DR   UniPathway; UPA00070; UER00119.
DR   Proteomes; UP000008811; Chromosome.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004588; F:orotate phosphoribosyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0044205; P:'de novo' UMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0019856; P:pyrimidine nucleobase biosynthetic process; IEA:InterPro.
DR   CDD; cd06223; PRTases_typeI; 1.
DR   Gene3D; 3.40.50.2020; -; 1.
DR   HAMAP; MF_01208; PyrE; 1.
DR   InterPro; IPR023031; OPRT.
DR   InterPro; IPR006273; Orotate_PRibTrfase_bac.
DR   InterPro; IPR029057; PRTase-like.
DR   InterPro; IPR000836; PRTase_dom.
DR   NCBIfam; TIGR01367; pyrE_Therm; 1.
DR   PANTHER; PTHR19278; OROTATE PHOSPHORIBOSYLTRANSFERASE; 1.
DR   PANTHER; PTHR19278:SF9; URIDINE 5'-MONOPHOSPHATE SYNTHASE; 1.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   SUPFAM; SSF53271; PRTase-like; 1.
DR   PROSITE; PS00103; PUR_PYR_PR_TRANSFER; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase; Magnesium; Pyrimidine biosynthesis;
KW   Reference proteome; Transferase.
FT   CHAIN           1..193
FT                   /note="Orotate phosphoribosyltransferase"
FT                   /id="PRO_1000138771"
FT   BINDING         114..122
FT                   /ligand="5-phospho-alpha-D-ribose 1-diphosphate"
FT                   /ligand_id="ChEBI:CHEBI:58017"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01208"
FT   BINDING         118
FT                   /ligand="orotate"
FT                   /ligand_id="ChEBI:CHEBI:30839"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01208"
FT   BINDING         146
FT                   /ligand="orotate"
FT                   /ligand_id="ChEBI:CHEBI:30839"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01208"
SQ   SEQUENCE   193 AA;  20447 MW;  19D4ED45965835F0 CRC64;
     MTNSETLAMF KSSGALLDGH FKLTSGRHSN SYFQCAKVLQ YPEYLSAICG EIAAHFRDSG
     ITTVISPAIG GIVVGTEVGR QLGVKTIFAE RKEGTMMIRR GFSIDPSEQV LVVEDVITTG
     GSVVEVMEQV KAAGATVAGV ASVVDRSNGK VKLADKQFSL LMMEVVSYAP EECPLCKEGL
     PIDAPGSRSN AQG
//