ID   G6E6R4_9SPHN            Unreviewed;       388 AA.
AC   G6E6R4;
DT   25-JAN-2012, integrated into UniProtKB/TrEMBL.
DT   25-JAN-2012, sequence version 1.
DT   27-NOV-2024, entry version 62.
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=NSU_0035 {ECO:0000313|EMBL:EHJ62960.1};
OS   Novosphingobium pentaromativorans US6-1.
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Sphingomonadales;
OC   Sphingomonadaceae; Novosphingobium.
OX   NCBI_TaxID=1088721 {ECO:0000313|EMBL:EHJ62960.1, ECO:0000313|Proteomes:UP000004030};
RN   [1] {ECO:0000313|EMBL:EHJ62960.1, ECO:0000313|Proteomes:UP000004030}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=US6-1 {ECO:0000313|EMBL:EHJ62960.1,
RC   ECO:0000313|Proteomes:UP000004030};
RX   PubMed=22275104; DOI=10.1128/JB.06476-11;
RA   Luo Y.R., Kang S.G., Kim S.J., Kim M.R., Li N., Lee J.H., Kwon K.K.;
RT   "Genome sequence of benzo(a)pyrene-degrading bacterium Novosphingobium
RT   pentaromativorans US6-1.";
RL   J. Bacteriol. 194:907-907(2012).
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: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC       whole genome shotgun (WGS) entry which is preliminary data.
CC       {ECO:0000313|EMBL:EHJ62960.1}.
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DR   EMBL; AGFM01000002; EHJ62960.1; -; Genomic_DNA.
DR   RefSeq; WP_007010952.1; NZ_CP009291.1.
DR   AlphaFoldDB; G6E6R4; -.
DR   STRING; 1088721.JI59_00650; -.
DR   KEGG; npn:JI59_00650; -.
DR   PATRIC; fig|1088721.3.peg.35; -.
DR   eggNOG; COG0505; Bacteria.
DR   OrthoDB; 9804328at2; -.
DR   UniPathway; UPA00068; UER00171.
DR   UniPathway; UPA00070; UER00115.
DR   Proteomes; UP000004030; 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-UniRule.
DR   CDD; cd01744; GATase1_CPSase; 1.
DR   FunFam; 3.50.30.20:FF:000001; Carbamoyl-phosphate synthase small chain; 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; PR00097; ANTSNTHASEII.
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|HAMAP-Rule:MF_01209,
KW   ECO:0000256|PROSITE-ProRule:PRU00605};
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};
KW   Pyrimidine biosynthesis {ECO:0000256|ARBA:ARBA00022975, ECO:0000256|HAMAP-
KW   Rule:MF_01209}; Reference proteome {ECO:0000313|Proteomes:UP000004030}.
FT   DOMAIN          15..145
FT                   /note="Carbamoyl-phosphate synthase small subunit N-
FT                   terminal"
FT                   /evidence="ECO:0000259|SMART:SM01097"
FT   REGION          1..204
FT                   /note="CPSase"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   ACT_SITE        282
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        366
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        368
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   BINDING         59
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         253
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         255
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         283
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         286
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         324
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         326
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         327
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
SQ   SEQUENCE   388 AA;  41229 MW;  00E10755DFD1BF2C CRC64;
     MADAAFSLAP KPEGATGVLV LSDGHVIWGR GFGAVGNAVG EVCFNTSMTG YQEVMTDPSY
     AGQIVTFTFP HIGNVGVNDE DLESRVDSAV GCVVREDVTP SSNFRAEGEF GDWLAAKGKI
     GLAGVDTRAL TRRIRLSGAP NAVIAHDPKG EFDIPALIKK AQEWPGLEGM DLAKIVSREH
     QEGWEGSTWT LGQGYGRSPR DERPHVVAMD FGAKDNIFRN LVKAGARVTV VPAEATLDQV
     LELKPQGVFL SNGPGDPAAT GKYAVPVIQG LLERDVPIFG ICLGHQMLAL AAGASTSKMH
     QGHRGANHPV KRLADDVVEI TSMNHGFAVD NATLPDTIEE THVSLFDGSN CGIAIKGKKA
     FGVQYHPEAS PGPQDSFYLF EKFVGALA
//