ID   A0A1M5PXD4_9FIRM        Unreviewed;       356 AA.
AC   A0A1M5PXD4;
DT   15-MAR-2017, integrated into UniProtKB/TrEMBL.
DT   15-MAR-2017, sequence version 1.
DT   27-NOV-2024, entry version 27.
DE   RecName: Full=Carbamoyl phosphate synthase small chain {ECO:0000256|HAMAP-Rule:MF_01209};
DE            EC=6.3.5.5 {ECO:0000256|HAMAP-Rule:MF_01209};
DE   AltName: Full=Carbamoyl phosphate synthetase glutamine chain {ECO:0000256|HAMAP-Rule:MF_01209};
GN   Name=carA {ECO:0000256|HAMAP-Rule:MF_01209};
GN   ORFNames=SAMN02745221_01602 {ECO:0000313|EMBL:SHH06535.1};
OS   Thermosyntropha lipolytica DSM 11003.
OC   Bacteria; Bacillota; Clostridia; Eubacteriales; Syntrophomonadaceae;
OC   Thermosyntropha.
OX   NCBI_TaxID=1123382 {ECO:0000313|EMBL:SHH06535.1, ECO:0000313|Proteomes:UP000242329};
RN   [1] {ECO:0000313|Proteomes:UP000242329}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 11003 {ECO:0000313|Proteomes:UP000242329};
RA   Varghese N., Submissions S.;
RL   Submitted (NOV-2016) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Small subunit of the glutamine-dependent carbamoyl phosphate
CC       synthetase (CPSase). CPSase catalyzes the formation of carbamoyl
CC       phosphate from the ammonia moiety of glutamine, carbonate, and
CC       phosphate donated by ATP, constituting the first step of 2 biosynthetic
CC       pathways, one leading to arginine and/or urea and the other to
CC       pyrimidine nucleotides. The small subunit (glutamine amidotransferase)
CC       binds and cleaves glutamine to supply the large subunit with the
CC       substrate ammonia. {ECO:0000256|HAMAP-Rule:MF_01209}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=hydrogencarbonate + L-glutamine + 2 ATP + H2O = carbamoyl
CC         phosphate + L-glutamate + 2 ADP + phosphate + 2 H(+);
CC         Xref=Rhea:RHEA:18633, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:17544, ChEBI:CHEBI:29985, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:58228, ChEBI:CHEBI:58359,
CC         ChEBI:CHEBI:456216; EC=6.3.5.5; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01209};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-glutamine + H2O = L-glutamate + NH4(+);
CC         Xref=Rhea:RHEA:15889, ChEBI:CHEBI:15377, ChEBI:CHEBI:28938,
CC         ChEBI:CHEBI:29985, ChEBI:CHEBI:58359; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01209};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-arginine biosynthesis; carbamoyl
CC       phosphate from bicarbonate: step 1/1. {ECO:0000256|ARBA:ARBA00005077,
CC       ECO:0000256|HAMAP-Rule:MF_01209}.
CC   -!- PATHWAY: Pyrimidine metabolism; UMP biosynthesis via de novo pathway;
CC       (S)-dihydroorotate from bicarbonate: step 1/3. {ECO:0000256|HAMAP-
CC       Rule:MF_01209}.
CC   -!- SUBUNIT: Composed of two chains; the small (or glutamine) chain
CC       promotes the hydrolysis of glutamine to ammonia, which is used by the
CC       large (or ammonia) chain to synthesize carbamoyl phosphate. Tetramer of
CC       heterodimers (alpha,beta)4. {ECO:0000256|HAMAP-Rule:MF_01209}.
CC   -!- SIMILARITY: Belongs to the CarA family. {ECO:0000256|ARBA:ARBA00007800,
CC       ECO:0000256|HAMAP-Rule:MF_01209}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_01209,
CC       ECO:0000256|PROSITE-ProRule:PRU00605}.
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DR   EMBL; FQWY01000027; SHH06535.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A1M5PXD4; -.
DR   STRING; 1123382.SAMN02745221_01602; -.
DR   OrthoDB; 9804328at2; -.
DR   UniPathway; UPA00068; UER00171.
DR   UniPathway; UPA00070; UER00115.
DR   Proteomes; UP000242329; Unassembled WGS sequence.
DR   GO; GO:0005951; C:carbamoyl-phosphate synthase complex; IEA:TreeGrafter.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004088; F:carbamoyl-phosphate synthase (glutamine-hydrolyzing) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0004359; F:glutaminase activity; IEA:RHEA.
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-UniPathway.
DR   GO; GO:0006526; P:arginine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-KW.
DR   CDD; cd01744; GATase1_CPSase; 1.
DR   Gene3D; 3.40.50.880; -; 1.
DR   Gene3D; 3.50.30.20; Carbamoyl-phosphate synthase small subunit, N-terminal domain; 1.
DR   HAMAP; MF_01209; CPSase_S_chain; 1.
DR   InterPro; IPR006274; CarbamoylP_synth_ssu.
DR   InterPro; IPR002474; CarbamoylP_synth_ssu_N.
DR   InterPro; IPR036480; CarbP_synth_ssu_N_sf.
DR   InterPro; IPR029062; Class_I_gatase-like.
DR   InterPro; IPR035686; CPSase_GATase1.
DR   InterPro; IPR017926; GATASE.
DR   NCBIfam; TIGR01368; CPSaseIIsmall; 1.
DR   PANTHER; PTHR11405:SF4; CARBAMOYL-PHOSPHATE SYNTHASE ARGININE-SPECIFIC SMALL CHAIN; 1.
DR   PANTHER; PTHR11405; CARBAMOYLTRANSFERASE FAMILY MEMBER; 1.
DR   Pfam; PF00988; CPSase_sm_chain; 1.
DR   Pfam; PF00117; GATase; 1.
DR   PRINTS; PR00099; CPSGATASE.
DR   PRINTS; PR00096; GATASE.
DR   SMART; SM01097; CPSase_sm_chain; 1.
DR   SUPFAM; SSF52021; Carbamoyl phosphate synthetase, small subunit N-terminal domain; 1.
DR   SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 1.
DR   PROSITE; PS51273; GATASE_TYPE_1; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|HAMAP-Rule:MF_01209};
KW   Arginine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01209};
KW   ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW   Rule:MF_01209};
KW   Glutamine amidotransferase {ECO:0000256|ARBA:ARBA00022962,
KW   ECO:0000256|HAMAP-Rule:MF_01209};
KW   Ligase {ECO:0000256|ARBA:ARBA00022598, ECO:0000256|HAMAP-Rule:MF_01209};
KW   Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW   Rule:MF_01209}; Pyrimidine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01209};
KW   Reference proteome {ECO:0000313|Proteomes:UP000242329}.
FT   DOMAIN          3..133
FT                   /note="Carbamoyl-phosphate synthase small subunit N-
FT                   terminal"
FT                   /evidence="ECO:0000259|SMART:SM01097"
FT   REGION          1..174
FT                   /note="CPSase"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   ACT_SITE        337
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         47
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         223
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         225
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         251
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         254
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         292
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         294
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         295
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
SQ   SEQUENCE   356 AA;  39173 MW;  CB9A6F9A2988A205 CRC64;
     MMKKGYLVLE NGRVFTGKLL NDCLLAGGEV VFTTAMISYQ DIITDPSYYG QIVVMTYPLV
     GNVGLNEKSY ASRGAMVKGL VLREATDFPS HYEMETDLIS FLNKSEVAVL TEVDTRALTR
     VLRNEGIMGG VITADISHKD WLVEKARKEA EELKGDLVKY VSRRNIMKFG AGKKRVVLLD
     LGTKRGVIDS FIRRGCEVVA VPADTGWDEI LNLNPDGVFI SDGPGDPSAV PYAINTCREV
     LGKKPVFGIG LGHQILALAL GAGINKLPFG HRGGNQPVKD MKNGRVYITT QNHGYCIDEK
     TIDGTGLQVT MRNLNDNTIE AVEHEKMPAF SVQFDPEGYP GYSETGFLFE KFISMF
//