ID   PYRC_ECOL6              Reviewed;         348 AA.
AC   Q8FIR2;
DT   22-AUG-2003, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   28-JAN-2026, entry version 120.
DE   RecName: Full=Dihydroorotase {ECO:0000255|HAMAP-Rule:MF_00219};
DE            Short=DHOase {ECO:0000255|HAMAP-Rule:MF_00219};
DE            EC=3.5.2.3 {ECO:0000255|HAMAP-Rule:MF_00219};
GN   Name=pyrC {ECO:0000255|HAMAP-Rule:MF_00219}; OrderedLocusNames=c1329;
OS   Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=199310;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CFT073 / ATCC 700928 / UPEC;
RX   PubMed=12471157; DOI=10.1073/pnas.252529799;
RA   Welch R.A., Burland V., Plunkett G. III, Redford P., Roesch P., Rasko D.,
RA   Buckles E.L., Liou S.-R., Boutin A., Hackett J., Stroud D., Mayhew G.F.,
RA   Rose D.J., Zhou S., Schwartz D.C., Perna N.T., Mobley H.L.T.,
RA   Donnenberg M.S., Blattner F.R.;
RT   "Extensive mosaic structure revealed by the complete genome sequence of
RT   uropathogenic Escherichia coli.";
RL   Proc. Natl. Acad. Sci. U.S.A. 99:17020-17024(2002).
CC   -!- FUNCTION: Catalyzes the reversible cyclization of carbamoyl aspartate
CC       to dihydroorotate. {ECO:0000255|HAMAP-Rule:MF_00219}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(S)-dihydroorotate + H2O = N-carbamoyl-L-aspartate + H(+);
CC         Xref=Rhea:RHEA:24296, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:30864, ChEBI:CHEBI:32814; EC=3.5.2.3;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00219};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00219};
CC       Note=Binds 2 Zn(2+) ions per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00219};
CC   -!- PATHWAY: Pyrimidine metabolism; UMP biosynthesis via de novo pathway;
CC       (S)-dihydroorotate from bicarbonate: step 3/3. {ECO:0000255|HAMAP-
CC       Rule:MF_00219}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00219}.
CC   -!- SIMILARITY: Belongs to the metallo-dependent hydrolases superfamily.
CC       DHOase family. Class II DHOase subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_00219}.
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DR   EMBL; AE014075; AAN79802.1; -; Genomic_DNA.
DR   RefSeq; WP_000126520.1; NC_004431.1.
DR   AlphaFoldDB; Q8FIR2; -.
DR   SMR; Q8FIR2; -.
DR   STRING; 199310.c1329; -.
DR   KEGG; ecc:c1329; -.
DR   eggNOG; COG0418; Bacteria.
DR   HOGENOM; CLU_041558_1_0_6; -.
DR   BioCyc; ECOL199310:C1329-MONOMER; -.
DR   UniPathway; UPA00070; UER00117.
DR   Proteomes; UP000001410; Chromosome.
DR   GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
DR   GO; GO:0004151; F:dihydroorotase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006207; P:'de novo' pyrimidine nucleobase biosynthetic process; IEA:TreeGrafter.
DR   GO; GO:0044205; P:'de novo' UMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd01294; DHOase; 1.
DR   FunFam; 3.20.20.140:FF:000006; Dihydroorotase; 1.
DR   Gene3D; 3.20.20.140; Metal-dependent hydrolases; 1.
DR   HAMAP; MF_00219; PyrC_classII; 1.
DR   InterPro; IPR006680; Amidohydro-rel.
DR   InterPro; IPR004721; DHOdimr.
DR   InterPro; IPR002195; Dihydroorotase_CS.
DR   InterPro; IPR032466; Metal_Hydrolase.
DR   NCBIfam; TIGR00856; pyrC_dimer; 1.
DR   PANTHER; PTHR43137; DIHYDROOROTASE; 1.
DR   PANTHER; PTHR43137:SF1; DIHYDROOROTASE; 1.
DR   Pfam; PF01979; Amidohydro_1; 1.
DR   PIRSF; PIRSF001237; DHOdimr; 1.
DR   SUPFAM; SSF51556; Metallo-dependent hydrolases; 1.
DR   PROSITE; PS00482; DIHYDROOROTASE_1; 1.
DR   PROSITE; PS00483; DIHYDROOROTASE_2; 1.
PE   3: Inferred from homology;
KW   Hydrolase; Metal-binding; Pyrimidine biosynthesis; Reference proteome;
KW   Zinc.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..348
FT                   /note="Dihydroorotase"
FT                   /id="PRO_0000147206"
FT   ACT_SITE        251
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         17
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         19..21
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         19
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         45
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         103
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="1"
FT                   /note="via carbamate group"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         103
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="2"
FT                   /note="via carbamate group"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         140
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         140
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         178
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         223
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         251
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         255
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   BINDING         267
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
FT   MOD_RES         103
FT                   /note="N6-carboxylysine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00219"
SQ   SEQUENCE   348 AA;  38760 MW;  693414ADEEE3646D CRC64;
     MTAPSQVLKI RCPDDWHLHL RDGDMLKTVV PYTSEIYGRA IVMPNLAPPV TTVEAAVAYR
     QRILDAVPAG HDFTPLMTCY LTDSLDPNEL ERGFNEGVFT AAKLYPANAT TNSSHGVTSV
     DAIMPVLERM EKIGMPLLVH GEVTHADIDI FDREARFIES VMEPLRQRLT ALKVVFEHIT
     TKDAADYVRD GNERLAATIT PQHLMFNRNH MLVGGVRPHL YCLPILKRNI HQQALRELVA
     SGFNRVFLGT DSAPHARHRK ESSCGCAGCF NAPTALGSYA TVFEEMNALQ HFEAFCSVNG
     PQFYGLPVND TFIELVREEQ QVAESIALTD DTLVPFLAGE TVRWSVKQ
//