PURA_PAUCH
ID PURA_PAUCH Reviewed; 437 AA.
AC B1X5S1;
DT 05-OCT-2010, integrated into UniProtKB/Swiss-Prot.
DT 20-MAY-2008, sequence version 1.
DT 03-AUG-2022, entry version 52.
DE RecName: Full=Adenylosuccinate synthetase, organellar chromatophore {ECO:0000255|HAMAP-Rule:MF_03125};
DE Short=AMPSase {ECO:0000255|HAMAP-Rule:MF_03125};
DE Short=AdSS {ECO:0000255|HAMAP-Rule:MF_03125};
DE EC=6.3.4.4 {ECO:0000255|HAMAP-Rule:MF_03125};
DE AltName: Full=IMP--aspartate ligase {ECO:0000255|HAMAP-Rule:MF_03125};
GN OrderedLocusNames=PCC_0881;
OS Paulinella chromatophora.
OG Plastid; Organellar chromatophore.
OC Eukaryota; Sar; Rhizaria; Imbricatea; Silicofilosea; Euglyphida;
OC Paulinellidae; Paulinella.
OX NCBI_TaxID=39717;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=18356055; DOI=10.1016/j.cub.2008.02.051;
RA Nowack E.C.M., Melkonian M., Gloeckner G.;
RT "Chromatophore genome sequence of Paulinella sheds light on acquisition of
RT photosynthesis by eukaryotes.";
RL Curr. Biol. 18:410-418(2008).
CC -!- FUNCTION: Plays an important role in the de novo pathway and in the
CC salvage pathway of purine nucleotide biosynthesis. Catalyzes the first
CC committed step in the biosynthesis of AMP from IMP (By similarity).
CC {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=GTP + IMP + L-aspartate = GDP + 2 H(+) + N(6)-(1,2-
CC dicarboxyethyl)-AMP + phosphate; Xref=Rhea:RHEA:15753,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29991, ChEBI:CHEBI:37565,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:57567, ChEBI:CHEBI:58053,
CC ChEBI:CHEBI:58189; EC=6.3.4.4; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_03125};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_03125};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_03125};
CC -!- PATHWAY: Purine metabolism; AMP biosynthesis via de novo pathway; AMP
CC from IMP: step 1/2. {ECO:0000255|HAMAP-Rule:MF_03125}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_03125}.
CC -!- SUBCELLULAR LOCATION: Plastid, organellar chromatophore.
CC -!- SIMILARITY: Belongs to the adenylosuccinate synthetase family.
CC {ECO:0000255|HAMAP-Rule:MF_03125}.
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DR EMBL; CP000815; ACB43290.1; -; Genomic_DNA.
DR RefSeq; YP_002049500.1; NC_011087.1.
DR AlphaFoldDB; B1X5S1; -.
DR SMR; B1X5S1; -.
DR GeneID; 6481662; -.
DR UniPathway; UPA00075; UER00335.
DR GO; GO:0070111; C:organellar chromatophore; IEA:UniProtKB-SubCell.
DR GO; GO:0009536; C:plastid; IEA:UniProtKB-KW.
DR GO; GO:0004019; F:adenylosuccinate synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0005525; F:GTP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0044208; P:'de novo' AMP biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd03108; AdSS; 1.
DR Gene3D; 1.10.300.10; -; 1.
DR Gene3D; 3.40.440.10; -; 1.
DR Gene3D; 3.90.170.10; -; 1.
DR HAMAP; MF_00011; Adenylosucc_synth; 1.
DR InterPro; IPR018220; Adenylosuccin_syn_GTP-bd.
DR InterPro; IPR033128; Adenylosuccin_syn_Lys_AS.
DR InterPro; IPR042109; Adenylosuccinate_synth_dom1.
DR InterPro; IPR042110; Adenylosuccinate_synth_dom2.
DR InterPro; IPR042111; Adenylosuccinate_synth_dom3.
DR InterPro; IPR001114; Adenylosuccinate_synthetase.
DR InterPro; IPR027417; P-loop_NTPase.
DR PANTHER; PTHR11846; PTHR11846; 1.
DR Pfam; PF00709; Adenylsucc_synt; 1.
DR SMART; SM00788; Adenylsucc_synt; 1.
DR SUPFAM; SSF52540; SSF52540; 1.
DR TIGRFAMs; TIGR00184; purA; 1.
DR PROSITE; PS01266; ADENYLOSUCCIN_SYN_1; 1.
DR PROSITE; PS00513; ADENYLOSUCCIN_SYN_2; 1.
PE 3: Inferred from homology;
KW GTP-binding; Ligase; Magnesium; Metal-binding; Nucleotide-binding;
KW Organellar chromatophore; Plastid; Purine biosynthesis.
FT CHAIN 1..437
FT /note="Adenylosuccinate synthetase, organellar
FT chromatophore"
FT /id="PRO_0000399300"
FT ACT_SITE 13
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT ACT_SITE 41
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 12..18
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 13..16
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 13
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 38..41
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 40..42
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 40
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 128
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 142
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 223
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 238
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 298..304
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 302
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /ligand_note="ligand shared between dimeric partners"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 304
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
FT BINDING 330..332
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03125"
SQ SEQUENCE 437 AA; 48254 MW; 05FF43145261F43B CRC64;
MANVVVIGAQ WGDEGKGKIT DLLSRSADVV VRYQGGVNAG HTIVVKDKVL KLHLIPSGIL
YPDTICLIGS GTVIDPKIML SELDMLVENQ IDISRLQLAS TAHVTMPYHR LLDQAMEQRR
GNNRIGTTGR GIGPTYSDKS ERIGIRVIDI LNEDKLRTRL ADPLRQKNNI LEKIYAISPL
DFEEIIKEYI EYGNRLAPHV VDCTRVIHQA ARARKNILFE GAQGTLLDLD HGTYPYVTSS
HPVSGGACIG AGVGPTLIDR VIGVAKAYTT RVGEGPFPTE LEGSLNDHLC SRGKEFGTTT
GRRRRCGWFD GVIGRYAVDV NGLDCLAITK LDVLDELEEI KVCVAYELNN ERIDYFTSNV
EDFSKCKPIF ETLPGWQSST SDCRSLEELP EKAMMYLKFL AELMEVPIAI VSIGPNRDQT
IIVEDPIHGP KRALLAA
