ID PYRB_LACPL Reviewed; 311 AA. AC P77883; F9URI5; DT 01-NOV-1997, integrated into UniProtKB/Swiss-Prot. DT 01-FEB-1997, sequence version 1. DT 28-JAN-2026, entry version 137. 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=lp_2703; OS Lactiplantibacillus plantarum (strain ATCC BAA-793 / NCIMB 8826 / WCFS1) OS (Lactobacillus plantarum). OC Bacteria; Bacillati; Bacillota; Bacilli; Lactobacillales; Lactobacillaceae; OC Lactiplantibacillus. OX NCBI_TaxID=220668; RN [1] RP NUCLEOTIDE SEQUENCE [GENOMIC DNA]. RC STRAIN=ATCC 8014 / CCM 1904 / DSM 20205 / NCDO 82 / NCIB 6376; RX PubMed=8982065; DOI=10.1016/s0378-1119(96)00461-1; RA Elagoez A., Abdi A., Hubert J.-C., Kammerer B.; RT "Structure and organisation of the pyrimidine biosynthesis pathway genes in RT Lactobacillus plantarum: a PCR strategy for sequencing without cloning."; RL Gene 182:37-43(1996). RN [2] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC BAA-793 / NCIMB 8826 / WCFS1; RX PubMed=12566566; DOI=10.1073/pnas.0337704100; RA Kleerebezem M., Boekhorst J., van Kranenburg R., Molenaar D., Kuipers O.P., RA Leer R., Tarchini R., Peters S.A., Sandbrink H.M., Fiers M.W.E.J., RA Stiekema W., Klein Lankhorst R.M., Bron P.A., Hoffer S.M., RA Nierop Groot M.N., Kerkhoven R., De Vries M., Ursing B., De Vos W.M., RA Siezen R.J.; RT "Complete genome sequence of Lactobacillus plantarum WCFS1."; RL Proc. Natl. Acad. Sci. U.S.A. 100:1990-1995(2003). RN [3] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], AND GENOME REANNOTATION. RC STRAIN=ATCC BAA-793 / NCIMB 8826 / WCFS1; RX PubMed=22156394; DOI=10.1128/jb.06275-11; RA Siezen R.J., Francke C., Renckens B., Boekhorst J., Wels M., RA Kleerebezem M., van Hijum S.A.; RT "Complete resequencing and reannotation of the Lactobacillus plantarum RT WCFS1 genome."; RL J. Bacteriol. 194:195-196(2012). 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, CC ECO:0000305}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; Z54240; CAA91002.1; -; Genomic_DNA. DR EMBL; AL935263; CCC79824.1; -; Genomic_DNA. DR RefSeq; WP_011101888.1; NC_004567.2. DR AlphaFoldDB; P77883; -. DR SMR; P77883; -. DR STRING; 220668.lp_2703; -. DR EnsemblBacteria; CCC79824; CCC79824; lp_2703. DR GeneID; 77215929; -. DR KEGG; lpl:lp_2703; -. DR PATRIC; fig|220668.9.peg.2263; -. DR eggNOG; COG0540; Bacteria. DR HOGENOM; CLU_043846_2_1_9; -. DR OrthoDB; 9774690at2; -. DR PhylomeDB; P77883; -. DR UniPathway; UPA00070; UER00116. DR Proteomes; UP000000432; 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..311 FT /note="Aspartate carbamoyltransferase catalytic subunit" FT /id="PRO_0000113148" FT BINDING 52 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 53 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 80 FT /ligand="L-aspartate" FT /ligand_id="ChEBI:CHEBI:29991" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 102 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 131 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 134 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 164 FT /ligand="L-aspartate" FT /ligand_id="ChEBI:CHEBI:29991" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 216 FT /ligand="L-aspartate" FT /ligand_id="ChEBI:CHEBI:29991" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 259 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" FT BINDING 260 FT /ligand="carbamoyl phosphate" FT /ligand_id="ChEBI:CHEBI:58228" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00001" SQ SEQUENCE 311 AA; 34712 MW; C035D9D9281A5431 CRC64; MKTSQNLVSV EQFSNQDVMA YLKLAQAFKN GKTVQLSQPT FAMNLFFENS TRTHTSFEMA ERRLGLQVIP FDPKTSSVTK GESLLDTLKT IEAIGVNLAV VRHPRDRYYQ PLLDAGFDMS LINAGDGSGQ HPSQSLLDML TIYEEFGHFD GLKIAIVGDL AHSRVARSNM ALLTQLGAQV YFGGPKEWYG RDFEAYGEYQ TMDQLVATMD VMMLLRVQHE RLSQVNNQTF DASAYHQQYG LTAERAARMP KHAIIMHPAP VNRGVELASD LVEAPQSRIF QQMTNGVYIR MAMVASVLAH QGLISATQVE V //