ID   PYRB_LEUMM              Reviewed;         297 AA.
AC   Q03WW4;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   14-NOV-2006, sequence version 1.
DT   18-JUN-2025, entry version 101.
DE   RecName: Full=Aspartate carbamoyltransferase catalytic subunit {ECO:0000255|HAMAP-Rule:MF_00001};
DE            EC=2.1.3.2 {ECO:0000255|HAMAP-Rule:MF_00001};
DE   AltName: Full=Aspartate transcarbamylase {ECO:0000255|HAMAP-Rule:MF_00001};
DE            Short=ATCase {ECO:0000255|HAMAP-Rule:MF_00001};
GN   Name=pyrB {ECO:0000255|HAMAP-Rule:MF_00001};
GN   OrderedLocusNames=LEUM_1210;
OS   Leuconostoc mesenteroides subsp. mesenteroides (strain ATCC 8293 / DSM
OS   20343 / BCRC 11652 / CCM 1803 / JCM 6124 / NCDO 523 / NBRC 100496 / NCIMB
OS   8023 / NCTC 12954 / NRRL B-1118 / 37Y).
OC   Bacteria; Bacillati; Bacillota; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Leuconostoc.
OX   NCBI_TaxID=203120;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 8293 / DSM 20343 / BCRC 11652 / CCM 1803 / JCM 6124 / NCDO
RC   523 / NBRC 100496 / NCIMB 8023 / NCTC 12954 / NRRL B-1118 / 37Y;
RX   PubMed=17030793; DOI=10.1073/pnas.0607117103;
RA   Makarova K.S., Slesarev A., Wolf Y.I., Sorokin A., Mirkin B., Koonin E.V.,
RA   Pavlov A., Pavlova N., Karamychev V., Polouchine N., Shakhova V.,
RA   Grigoriev I., Lou Y., Rohksar D., Lucas S., Huang K., Goodstein D.M.,
RA   Hawkins T., Plengvidhya V., Welker D., Hughes J., Goh Y., Benson A.,
RA   Baldwin K., Lee J.-H., Diaz-Muniz I., Dosti B., Smeianov V., Wechter W.,
RA   Barabote R., Lorca G., Altermann E., Barrangou R., Ganesan B., Xie Y.,
RA   Rawsthorne H., Tamir D., Parker C., Breidt F., Broadbent J.R., Hutkins R.,
RA   O'Sullivan D., Steele J., Unlu G., Saier M.H. Jr., Klaenhammer T.,
RA   Richardson P., Kozyavkin S., Weimer B.C., Mills D.A.;
RT   "Comparative genomics of the lactic acid bacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 103:15611-15616(2006).
CC   -!- FUNCTION: Catalyzes the condensation of carbamoyl phosphate and
CC       aspartate to form carbamoyl aspartate and inorganic phosphate, the
CC       committed step in the de novo pyrimidine nucleotide biosynthesis
CC       pathway. {ECO:0000255|HAMAP-Rule:MF_00001}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=carbamoyl phosphate + L-aspartate = N-carbamoyl-L-aspartate +
CC         phosphate + H(+); Xref=Rhea:RHEA:20013, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:29991, ChEBI:CHEBI:32814, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:58228; EC=2.1.3.2; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00001};
CC   -!- PATHWAY: Pyrimidine metabolism; UMP biosynthesis via de novo pathway;
CC       (S)-dihydroorotate from bicarbonate: step 2/3. {ECO:0000255|HAMAP-
CC       Rule:MF_00001}.
CC   -!- SUBUNIT: Heterododecamer (2C3:3R2) of six catalytic PyrB chains
CC       organized as two trimers (C3), and six regulatory PyrI chains organized
CC       as three dimers (R2). {ECO:0000255|HAMAP-Rule:MF_00001}.
CC   -!- SIMILARITY: Belongs to the aspartate/ornithine carbamoyltransferase
CC       superfamily. ATCase family. {ECO:0000255|HAMAP-Rule:MF_00001}.
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DR   EMBL; CP000414; ABJ62308.1; -; Genomic_DNA.
DR   RefSeq; WP_011679936.1; NC_008531.1.
DR   AlphaFoldDB; Q03WW4; -.
DR   SMR; Q03WW4; -.
DR   EnsemblBacteria; ABJ62308; ABJ62308; LEUM_1210.
DR   GeneID; 29575765; -.
DR   KEGG; lme:LEUM_1210; -.
DR   eggNOG; COG0540; Bacteria.
DR   HOGENOM; CLU_043846_2_1_9; -.
DR   UniPathway; UPA00070; UER00116.
DR   Proteomes; UP000000362; Chromosome.
DR   GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
DR   GO; GO:0016597; F:amino acid binding; IEA:InterPro.
DR   GO; GO:0004070; F:aspartate carbamoyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006207; P:'de novo' pyrimidine nucleobase biosynthetic process; IEA:InterPro.
DR   GO; GO:0044205; P:'de novo' UMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006520; P:amino acid metabolic process; IEA:InterPro.
DR   FunFam; 3.40.50.1370:FF:000011; Aspartate carbamoyltransferase; 1.
DR   Gene3D; 3.40.50.1370; Aspartate/ornithine carbamoyltransferase; 2.
DR   HAMAP; MF_00001; Asp_carb_tr; 1.
DR   InterPro; IPR006132; Asp/Orn_carbamoyltranf_P-bd.
DR   InterPro; IPR006130; Asp/Orn_carbamoylTrfase.
DR   InterPro; IPR036901; Asp/Orn_carbamoylTrfase_sf.
DR   InterPro; IPR002082; Asp_carbamoyltransf.
DR   InterPro; IPR006131; Asp_carbamoyltransf_Asp/Orn-bd.
DR   NCBIfam; TIGR00670; asp_carb_tr; 1.
DR   NCBIfam; NF002032; PRK00856.1; 1.
DR   PANTHER; PTHR45753:SF6; ASPARTATE CARBAMOYLTRANSFERASE; 1.
DR   PANTHER; PTHR45753; ORNITHINE CARBAMOYLTRANSFERASE, MITOCHONDRIAL; 1.
DR   Pfam; PF00185; OTCace; 1.
DR   Pfam; PF02729; OTCace_N; 1.
DR   PRINTS; PR00100; AOTCASE.
DR   PRINTS; PR00101; ATCASE.
DR   SUPFAM; SSF53671; Aspartate/ornithine carbamoyltransferase; 1.
DR   PROSITE; PS00097; CARBAMOYLTRANSFERASE; 1.
PE   3: Inferred from homology;
KW   Pyrimidine biosynthesis; Reference proteome; Transferase.
FT   CHAIN           1..297
FT                   /note="Aspartate carbamoyltransferase catalytic subunit"
FT                   /id="PRO_0000301585"
FT   BINDING         48
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         49
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         76
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         98
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         129
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         132
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         162
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         214
FT                   /ligand="L-aspartate"
FT                   /ligand_id="ChEBI:CHEBI:29991"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         257
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
FT   BINDING         258
FT                   /ligand="carbamoyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58228"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00001"
SQ   SEQUENCE   297 AA;  33605 MW;  3B0B4DF7CB42226B CRC64;
     MRNYLNINAI NKNDVLHLIQ RALALKSGEQ PKTKSITAVN LFFENSTRTH SSFQMAENQL
     NWKQIQIDPQ TSSMTKGESL VDTLKTLKAI GVDVAVIRHS QNSWYENVLR SEGHAIPQLV
     NAGDGSGQHP SQSLLDLVTI YQEFGHFEGL KVRIIGDLAH SRVARSNAEI LNKLGATVTF
     SGPKDWQPVD FDSFGEHVDL DVGWSEQDVV MFLRVQHERI THTENQNFSA KKYHEVYGLT
     ESRYENLKEN SIIMHPAPVN RDVEIADDLV EAPKSRIFDQ MTNGVYARMA ILEYVTE
//