PDXT_PICTO
ID PDXT_PICTO Reviewed; 189 AA.
AC Q6L1R3;
DT 05-JUL-2005, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 91.
DE RecName: Full=Pyridoxal 5'-phosphate synthase subunit PdxT {ECO:0000255|HAMAP-Rule:MF_01615};
DE EC=4.3.3.6 {ECO:0000255|HAMAP-Rule:MF_01615};
DE AltName: Full=Pdx2 {ECO:0000255|HAMAP-Rule:MF_01615};
DE AltName: Full=Pyridoxal 5'-phosphate synthase glutaminase subunit {ECO:0000255|HAMAP-Rule:MF_01615};
DE EC=3.5.1.2 {ECO:0000255|HAMAP-Rule:MF_01615};
GN Name=pdxT {ECO:0000255|HAMAP-Rule:MF_01615}; OrderedLocusNames=PTO0504;
OS Picrophilus torridus (strain ATCC 700027 / DSM 9790 / JCM 10055 / NBRC
OS 100828).
OC Archaea; Candidatus Thermoplasmatota; Thermoplasmata; Thermoplasmatales;
OC Picrophilaceae; Picrophilus.
OX NCBI_TaxID=263820;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700027 / DSM 9790 / JCM 10055 / NBRC 100828;
RX PubMed=15184674; DOI=10.1073/pnas.0401356101;
RA Fuetterer O., Angelov A., Liesegang H., Gottschalk G., Schleper C.,
RA Schepers B., Dock C., Antranikian G., Liebl W.;
RT "Genome sequence of Picrophilus torridus and its implications for life
RT around pH 0.";
RL Proc. Natl. Acad. Sci. U.S.A. 101:9091-9096(2004).
CC -!- FUNCTION: Catalyzes the hydrolysis of glutamine to glutamate and
CC ammonia as part of the biosynthesis of pyridoxal 5'-phosphate. The
CC resulting ammonia molecule is channeled to the active site of PdxS.
CC {ECO:0000255|HAMAP-Rule:MF_01615}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=aldehydo-D-ribose 5-phosphate + D-glyceraldehyde 3-phosphate +
CC L-glutamine = H(+) + 3 H2O + L-glutamate + phosphate + pyridoxal 5'-
CC phosphate; Xref=Rhea:RHEA:31507, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29985, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58273, ChEBI:CHEBI:58359, ChEBI:CHEBI:59776,
CC ChEBI:CHEBI:597326; EC=4.3.3.6; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01615};
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; EC=3.5.1.2;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01615};
CC -!- PATHWAY: Cofactor biosynthesis; pyridoxal 5'-phosphate biosynthesis.
CC {ECO:0000255|HAMAP-Rule:MF_01615}.
CC -!- SUBUNIT: In the presence of PdxS, forms a dodecamer of heterodimers.
CC Only shows activity in the heterodimer. {ECO:0000255|HAMAP-
CC Rule:MF_01615}.
CC -!- SIMILARITY: Belongs to the glutaminase PdxT/SNO family.
CC {ECO:0000255|HAMAP-Rule:MF_01615}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AE017261; AAT43089.1; -; Genomic_DNA.
DR RefSeq; WP_011177305.1; NC_005877.1.
DR AlphaFoldDB; Q6L1R3; -.
DR SMR; Q6L1R3; -.
DR STRING; 263820.PTO0504; -.
DR EnsemblBacteria; AAT43089; AAT43089; PTO0504.
DR GeneID; 2843977; -.
DR KEGG; pto:PTO0504; -.
DR PATRIC; fig|263820.9.peg.531; -.
DR eggNOG; arCOG00034; Archaea.
DR HOGENOM; CLU_069674_2_0_2; -.
DR OMA; VFIRAPI; -.
DR OrthoDB; 78046at2157; -.
DR UniPathway; UPA00245; -.
DR Proteomes; UP000000438; Chromosome.
DR GO; GO:0004359; F:glutaminase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0036381; F:pyridoxal 5'-phosphate synthase (glutamine hydrolysing) activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006543; P:glutamine catabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:0042823; P:pyridoxal phosphate biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd01749; GATase1_PB; 1.
DR Gene3D; 3.40.50.880; -; 1.
DR HAMAP; MF_01615; PdxT; 1.
DR InterPro; IPR029062; Class_I_gatase-like.
DR InterPro; IPR002161; PdxT/SNO.
DR InterPro; IPR021196; PdxT/SNO_CS.
DR PANTHER; PTHR31559; PTHR31559; 1.
DR Pfam; PF01174; SNO; 1.
DR PIRSF; PIRSF005639; Glut_amidoT_SNO; 1.
DR SUPFAM; SSF52317; SSF52317; 1.
DR TIGRFAMs; TIGR03800; PLP_synth_Pdx2; 1.
DR PROSITE; PS01236; PDXT_SNO_1; 1.
DR PROSITE; PS51130; PDXT_SNO_2; 1.
PE 3: Inferred from homology;
KW Glutamine amidotransferase; Hydrolase; Lyase; Pyridoxal phosphate;
KW Reference proteome.
FT CHAIN 1..189
FT /note="Pyridoxal 5'-phosphate synthase subunit PdxT"
FT /id="PRO_0000135685"
FT ACT_SITE 80
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT ACT_SITE 169
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT ACT_SITE 171
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT BINDING 50..52
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT BINDING 107
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT BINDING 134..135
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
SQ SEQUENCE 189 AA; 21042 MW; 0BC48463F69F9237 CRC64;
MKIGVLGIQG DVYEHYTAIR PLKNKYKVEA YIIRSPEEIN EMDGIIIPGG ESTTITRFLS
RYINIINENV RNGMKIMGTC AGAIILSKDT GDPRVHGTGI MDIKIQRNAY GRQIDSFIDA
VNIKNIGTFN AVFIRAPVID DPGKTSVLGE YNGKPVIVEN ENAIAMTFHP ELTGDLRVHE
YFLRKVMGN
