ID   GLN1B_AQUAE             Reviewed;         469 AA.
AC   O66514;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   27-MAR-2024, entry version 127.
DE   RecName: Full=Glutamine synthetase {ECO:0000250|UniProtKB:P9WN39};
DE            Short=GS {ECO:0000250|UniProtKB:P9WN39};
DE            EC=6.3.1.2 {ECO:0000250|UniProtKB:P9WN39};
DE   AltName: Full=Glutamate--ammonia ligase {ECO:0000250|UniProtKB:P9WN39};
DE   AltName: Full=Glutamine synthetase I beta {ECO:0000250|UniProtKB:P9WN39};
DE            Short=GSI beta {ECO:0000250|UniProtKB:P9WN39};
GN   Name=glnA {ECO:0000250|UniProtKB:P9WN39}; OrderedLocusNames=aq_111;
OS   Aquifex aeolicus (strain VF5).
OC   Bacteria; Aquificota; Aquificae; Aquificales; Aquificaceae; Aquifex.
OX   NCBI_TaxID=224324;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VF5;
RX   PubMed=9537320; DOI=10.1038/32831;
RA   Deckert G., Warren P.V., Gaasterland T., Young W.G., Lenox A.L.,
RA   Graham D.E., Overbeek R., Snead M.A., Keller M., Aujay M., Huber R.,
RA   Feldman R.A., Short J.M., Olsen G.J., Swanson R.V.;
RT   "The complete genome of the hyperthermophilic bacterium Aquifex aeolicus.";
RL   Nature 392:353-358(1998).
CC   -!- FUNCTION: Catalyzes the ATP-dependent biosynthesis of glutamine from
CC       glutamate and ammonia. {ECO:0000250|UniProtKB:P9WN39}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-glutamate + NH4(+) = ADP + H(+) + L-glutamine +
CC         phosphate; Xref=Rhea:RHEA:16169, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:28938, ChEBI:CHEBI:29985, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:58359, ChEBI:CHEBI:456216; EC=6.3.1.2;
CC         Evidence={ECO:0000250|UniProtKB:P9WN39};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000250|UniProtKB:P9WN39};
CC       Note=Binds 2 Mg(2+) ions per subunit. {ECO:0000250|UniProtKB:P9WN39};
CC   -!- ACTIVITY REGULATION: The activity of this enzyme could be controlled by
CC       adenylation under conditions of abundant glutamine.
CC       {ECO:0000250|UniProtKB:P9WN39}.
CC   -!- SUBUNIT: Oligomer of 12 subunits arranged in the form of two hexagons.
CC       {ECO:0000250|UniProtKB:P9WN39}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P9WN39}.
CC   -!- SIMILARITY: Belongs to the glutamine synthetase family.
CC       {ECO:0000250|UniProtKB:P9WN39}.
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DR   EMBL; AE000657; AAC06472.1; -; Genomic_DNA.
DR   PIR; G70310; G70310.
DR   RefSeq; NP_213074.1; NC_000918.1.
DR   RefSeq; WP_010880012.1; NC_000918.1.
DR   AlphaFoldDB; O66514; -.
DR   SMR; O66514; -.
DR   STRING; 224324.aq_111; -.
DR   EnsemblBacteria; AAC06472; AAC06472; aq_111.
DR   KEGG; aae:aq_111; -.
DR   PATRIC; fig|224324.8.peg.95; -.
DR   eggNOG; COG0174; Bacteria.
DR   HOGENOM; CLU_017290_1_2_0; -.
DR   InParanoid; O66514; -.
DR   OrthoDB; 9807095at2; -.
DR   Proteomes; UP000000798; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
DR   GO; GO:0016020; C:membrane; IBA:GO_Central.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0004356; F:glutamine synthetase activity; IBA:GO_Central.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0006542; P:glutamine biosynthetic process; IBA:GO_Central.
DR   GO; GO:0019740; P:nitrogen utilization; IBA:GO_Central.
DR   Gene3D; 3.10.20.70; Glutamine synthetase, N-terminal domain; 1.
DR   Gene3D; 3.30.590.10; Glutamine synthetase/guanido kinase, catalytic domain; 1.
DR   InterPro; IPR008147; Gln_synt_N.
DR   InterPro; IPR036651; Gln_synt_N_sf.
DR   InterPro; IPR014746; Gln_synth/guanido_kin_cat_dom.
DR   InterPro; IPR008146; Gln_synth_cat_dom.
DR   InterPro; IPR004809; Gln_synth_I.
DR   NCBIfam; TIGR00653; GlnA; 1.
DR   PANTHER; PTHR43407; GLUTAMINE SYNTHETASE; 1.
DR   PANTHER; PTHR43407:SF1; LENGSIN; 1.
DR   Pfam; PF00120; Gln-synt_C; 1.
DR   Pfam; PF03951; Gln-synt_N; 1.
DR   SMART; SM01230; Gln-synt_C; 1.
DR   SUPFAM; SSF54368; Glutamine synthetase, N-terminal domain; 1.
DR   SUPFAM; SSF55931; Glutamine synthetase/guanido kinase; 1.
DR   PROSITE; PS51986; GS_BETA_GRASP; 1.
DR   PROSITE; PS51987; GS_CATALYTIC; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Ligase; Magnesium; Metal-binding;
KW   Nucleotide-binding; Phosphoprotein; Reference proteome.
FT   CHAIN           1..469
FT                   /note="Glutamine synthetase"
FT                   /id="PRO_0000153228"
FT   DOMAIN          16..100
FT                   /note="GS beta-grasp"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01330"
FT   DOMAIN          108..469
FT                   /note="GS catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01331"
FT   BINDING         133
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         135
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         207
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         212
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         220
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         264..265
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         265
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P12425"
FT   BINDING         269
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         271..273
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         273
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P77961"
FT   BINDING         321
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         327
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P0A1P6"
FT   BINDING         339
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         339
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         344
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         353
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250|UniProtKB:P77961"
FT   BINDING         358
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   BINDING         360
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
FT   MOD_RES         398
FT                   /note="O-AMP-tyrosine"
FT                   /evidence="ECO:0000250|UniProtKB:P9WN39"
SQ   SEQUENCE   469 AA;  53294 MW;  688504C9FD95B056 CRC64;
     MPKYTPEEVL DLIQKEGVQY VDLRFSDPFG QWQHLTIPAY EISKETFEVG RGFDGSSIRG
     WQSINESDML AKPDPNTAFI DPFIEPKTLV MICDIYDPVT GERYGRDTRY IAQKAEQYLK
     QTGIGDTAYF GPEAEFFIFD SVEFGTAANY AFWRVDSEEG WWNREVPSSG YKIPHKRGYF
     PAPPVDKMMQ LRNEMVSIMS DLGIIVELHH HEVATAGQGE IDIRYDSLLN QADKLFLYKY
     IVRMVAAKHG KYATFMAKVL PNDNGSGMHT HFSIWKNGEN LFAGSEYAGL SKTALYAIGG
     ILKHGPAIAA FTNPTVNSYH RLVPGYEAPV RLAYSARNRS AAIRIPMYSQ NPKAKRIEVR
     FPDATSNPYL AFAAILMAAI DGIENEIDPG EPFDKDIYSL PPEELEGIPQ LPGSLEEALK
     ALEEDYEFLL KGNVFTEEFI QLWIESKRAE IDELRFIPHP KEFELYWDI
//