PDXT_PSELT
ID PDXT_PSELT Reviewed; 195 AA.
AC A8F840;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 20-MAY-2008, sequence version 2.
DT 03-AUG-2022, entry version 71.
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=Tlet_1770;
OS Pseudothermotoga lettingae (strain ATCC BAA-301 / DSM 14385 / NBRC 107922 /
OS TMO) (Thermotoga lettingae).
OC Bacteria; Thermotogae; Thermotogales; Thermotogaceae; Pseudothermotoga.
OX NCBI_TaxID=416591;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-301 / DSM 14385 / NBRC 107922 / TMO;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA Tice H., Pitluck S., Foster B., Bruce D., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Mikhailova N., Nelson K., Gogarten J.P., Noll K.,
RA Richardson P.;
RT "Complete sequence of Thermotoga lettingae TMO.";
RL Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases.
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 -!- SEQUENCE CAUTION:
CC Sequence=ABV34324.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; CP000812; ABV34324.1; ALT_INIT; Genomic_DNA.
DR RefSeq; WP_028843718.1; NC_009828.1.
DR AlphaFoldDB; A8F840; -.
DR SMR; A8F840; -.
DR STRING; 416591.Tlet_1770; -.
DR MEROPS; C26.A32; -.
DR EnsemblBacteria; ABV34324; ABV34324; Tlet_1770.
DR KEGG; tle:Tlet_1770; -.
DR eggNOG; COG0311; Bacteria.
DR HOGENOM; CLU_069674_2_0_0; -.
DR UniPathway; UPA00245; -.
DR Proteomes; UP000002016; 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..195
FT /note="Pyridoxal 5'-phosphate synthase subunit PdxT"
FT /id="PRO_0000335573"
FT ACT_SITE 78
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT ACT_SITE 170
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT ACT_SITE 172
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT BINDING 46..48
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01615"
FT BINDING 106
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 195 AA; 21641 MW; 11A3D1DEA044D795 CRC64;
MTIGVLGLQG DFREHLWALQ KLQVETIVVK TVEDLRKTKG LIIPGGESTT IGKLARLTGI
ADELEKLVDQ DFPIYGTCAG MILLAKQIVN YPYQYSFGFM DIVVERNAYG RQVESFEVNL
DIPSTGGLFK AIFIRAPKIV EWGEGVEVLA RYGDSPVLVR QGNLLASSFH PELGQDLRIH
KYFLEMAGVK HAGIC
