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Database: UniProt
Entry: A0A1Y5SHA2_9RHOB
LinkDB: A0A1Y5SHA2_9RHOB
Original site: A0A1Y5SHA2_9RHOB 
ID   A0A1Y5SHA2_9RHOB        Unreviewed;       387 AA.
AC   A0A1Y5SHA2;
DT   30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT   30-AUG-2017, sequence version 1.
DT   27-MAR-2024, entry version 22.
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   ECO:0000313|EMBL:SLN40679.1};
GN   ORFNames=PAM7971_01848 {ECO:0000313|EMBL:SLN40679.1};
OS   Pacificibacter marinus.
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC   Roseobacteraceae; Pacificibacter.
OX   NCBI_TaxID=658057 {ECO:0000313|EMBL:SLN40679.1, ECO:0000313|Proteomes:UP000193307};
RN   [1] {ECO:0000313|EMBL:SLN40679.1, ECO:0000313|Proteomes:UP000193307}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CECT 7971 {ECO:0000313|EMBL:SLN40679.1,
RC   ECO:0000313|Proteomes:UP000193307};
RA   Afonso C.L., Miller P.J., Scott M.A., Spackman E., Goraichik I.,
RA   Dimitrov K.M., Suarez D.L., Swayne D.E.;
RL   Submitted (MAR-2017) 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=2 ATP + H2O + hydrogencarbonate + L-glutamine = 2 ADP +
CC         carbamoyl phosphate + 2 H(+) + L-glutamate + phosphate;
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=H2O + L-glutamine = 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}.
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DR   EMBL; FWFW01000005; SLN40679.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A1Y5SHA2; -.
DR   STRING; 658057.SAMN04488032_104229; -.
DR   OrthoDB; 9804328at2; -.
DR   UniPathway; UPA00068; UER00171.
DR   UniPathway; UPA00070; UER00115.
DR   Proteomes; UP000193307; Unassembled WGS sequence.
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: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   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}; Pyrimidine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01209};
KW   Reference proteome {ECO:0000313|Proteomes:UP000193307}.
FT   DOMAIN          10..140
FT                   /note="Carbamoyl-phosphate synthase small subunit N-
FT                   terminal"
FT                   /evidence="ECO:0000259|SMART:SM01097"
FT   REGION          1..198
FT                   /note="CPSase"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   ACT_SITE        276
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        360
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        362
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   BINDING         54
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         247
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         249
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         277
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         280
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         318
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         320
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
FT   BINDING         321
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01209"
SQ   SEQUENCE   387 AA;  41234 MW;  26DA49FB920B862F CRC64;
     MSTTQSTAKP TACLVLADGT VFYGNGFGAT GTTTAELCFN TAMTGYQEIM TDPSYAGQVV
     TFTFPHIGNT GVNAEDDETA DPVAAGMIVK WDPTDPSNWR TQEELGPWLA KRGRIGMGGI
     DTRRLTRAIR QQGAPHVAIS HDPEGNFDIE ALVKMAREFP GLEGTDLAKD VTCAQSYVWN
     EMRWAWPDGY PKRDTKGFKV VAIDFGAKRN ILRCLASAGC DVTVLPASAT AEDVLAHSPD
     GVFLSNGPGD PAATGVYAVP MIKGVLAADL PVFGICLGHQ MLALALGAKT IKMNHGHHGA
     NHPVKDKDTG KVEITSMNHG FAVDAQSLPA GVVETHVSLF DGSNCGIKVT GKPVFSVQYH
     PEASPGPMDS YYLFERFAEA MTARTPA
//
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