ID SNO2_YEAST Reviewed; 222 AA. AC P53823; D6W0L3; DT 01-OCT-1996, integrated into UniProtKB/Swiss-Prot. DT 01-OCT-1996, sequence version 1. DT 04-NOV-2026, entry version 172. DE RecName: Full=Probable pyridoxal 5'-phosphate synthase subunit SNO2; DE EC=4.3.3.6; DE AltName: Full=PDX2 homolog 2; DE Short=Pdx2.2; DE AltName: Full=Pyridoxal 5'-phosphate synthase glutaminase subunit; DE EC=3.5.1.2; GN Name=SNO2; OrderedLocusNames=YNL334C; ORFNames=N0285; OS Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast). OC Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes; OC Saccharomycetales; Saccharomycetaceae; Saccharomyces. OX NCBI_TaxID=559292; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC 204508 / S288c; RX PubMed=9169873; DOI=10.1038/387s093; RA Philippsen P., Kleine K., Poehlmann R., Duesterhoeft A., Hamberg K., RA Hegemann J.H., Obermaier B., Urrestarazu L.A., Aert R., Albermann K., RA Altmann R., Andre B., Baladron V., Ballesta J.P.G., Becam A.-M., RA Beinhauer J.D., Boskovic J., Buitrago M.J., Bussereau F., Coster F., RA Crouzet M., D'Angelo M., Dal Pero F., De Antoni A., del Rey F., Doignon F., RA Domdey H., Dubois E., Fiedler T.A., Fleig U., Floeth M., Fritz C., RA Gaillardin C., Garcia-Cantalejo J.M., Glansdorff N., Goffeau A., RA Gueldener U., Herbert C.J., Heumann K., Heuss-Neitzel D., Hilbert H., RA Hinni K., Iraqui Houssaini I., Jacquet M., Jimenez A., Jonniaux J.-L., RA Karpfinger-Hartl L., Lanfranchi G., Lepingle A., Levesque H., Lyck R., RA Maftahi M., Mallet L., Maurer C.T.C., Messenguy F., Mewes H.-W., Moestl D., RA Nasr F., Nicaud J.-M., Niedenthal R.K., Pandolfo D., Pierard A., RA Piravandi E., Planta R.J., Pohl T.M., Purnelle B., Rebischung C., RA Remacha M.A., Revuelta J.L., Rinke M., Saiz J.E., Sartorello F., RA Scherens B., Sen-Gupta M., Soler-Mira A., Urbanus J.H.M., Valle G., RA Van Dyck L., Verhasselt P., Vierendeels F., Vissers S., Voet M., RA Volckaert G., Wach A., Wambutt R., Wedler H., Zollner A., Hani J.; RT "The nucleotide sequence of Saccharomyces cerevisiae chromosome XIV and its RT evolutionary implications."; RL Nature 387:93-98(1997). RN [2] RP GENOME REANNOTATION. RC STRAIN=ATCC 204508 / S288c; RX PubMed=24374639; DOI=10.1534/g3.113.008995; RA Engel S.R., Dietrich F.S., Fisk D.G., Binkley G., Balakrishnan R., RA Costanzo M.C., Dwight S.S., Hitz B.C., Karra K., Nash R.S., Weng S., RA Wong E.D., Lloyd P., Skrzypek M.S., Miyasato S.R., Simison M., Cherry J.M.; RT "The reference genome sequence of Saccharomyces cerevisiae: Then and now."; RL G3 (Bethesda) 4:389-398(2014). RN [3] RP FUNCTION. RX PubMed=12271461; DOI=10.1002/yea.916; RA Rodriguez-Navarro S., Llorente B., Rodriguez-Manzaneque M.T., Ramne A., RA Uber G., Marchesan D., Dujon B., Herrero E., Sunnerhagen P., RA Perez-Ortin J.E.; RT "Functional analysis of yeast gene families involved in metabolism of RT vitamins B1 and B6."; RL Yeast 19:1261-1276(2002). 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 a SNZ CC isoform. {ECO:0000250|UniProtKB:Q03144, ECO:0000269|PubMed:12271461}. CC -!- CATALYTIC ACTIVITY: CC Reaction=aldehydo-D-ribose 5-phosphate + D-glyceraldehyde 3-phosphate + CC L-glutamine = pyridoxal 5'-phosphate + L-glutamate + phosphate + 3 CC H2O + H(+); 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; CC Evidence={ECO:0000250|UniProtKB:Q03144}; CC -!- CATALYTIC ACTIVITY: CC Reaction=L-glutamine + H2O = 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:0000250|UniProtKB:Q03144}; CC -!- PATHWAY: Cofactor biosynthesis; pyridoxal 5'-phosphate biosynthesis. CC {ECO:0000250|UniProtKB:Q03144}. CC -!- SIMILARITY: Belongs to the glutaminase PdxT/SNO family. {ECO:0000305}. 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; Z71610; CAA96268.1; -; Genomic_DNA. DR EMBL; BK006947; DAA10229.1; -; Genomic_DNA. DR PIR; S63320; S63320. DR RefSeq; NP_014065.1; NM_001183172.1. DR AlphaFoldDB; P53823; -. DR SMR; P53823; -. DR BioGRID; 35507; 65. DR ComplexPortal; CPX-1371; SNO2-SNZ1 pyridoxal 5'-phosphate synthase complex. DR DIP; DIP-2069N; -. DR FunCoup; P53823; 251. DR IntAct; P53823; 7. DR STRING; 4932.YNL334C; -. DR MEROPS; C26.A32; -. DR PaxDb; 4932-YNL334C; -. DR PeptideAtlas; P53823; -. DR EnsemblFungi; YNL334C_mRNA; YNL334C; YNL334C. DR GeneID; 855382; -. DR KEGG; sce:YNL334C; -. DR AGR; SGD:S000005278; -. DR SGD; S000005278; SNO2. DR VEuPathDB; FungiDB:YNL334C; -. DR eggNOG; KOG3210; Eukaryota. DR HOGENOM; CLU_069674_0_1_1; -. DR InParanoid; P53823; -. DR OMA; AAEHWTD; -. DR OrthoDB; 2039at2759; -. DR BioCyc; YEAST:G3O-33317-MONOMER; -. DR UniPathway; UPA00245; -. DR PRO; PR:P53823; -. DR Proteomes; UP000002311; Chromosome XIV. DR RNAct; P53823; protein. DR GO; GO:1903600; C:glutaminase complex; IBA:GO_Central. DR GO; GO:0004359; F:glutaminase activity; IEA:UniProtKB-EC. DR GO; GO:0036381; F:pyridoxal 5'-phosphate synthase (glutamine hydrolysing) activity; IEA:UniProtKB-EC. DR GO; GO:0042823; P:pyridoxal 5'-phosphate biosynthetic process; IBA:GO_Central. DR GO; GO:0008614; P:pyridoxine metabolic process; IBA:GO_Central. DR CDD; cd01749; GATase1_PB; 1. DR FunFam; 3.40.50.880:FF:000042; Pyridoxine 2; 1. DR Gene3D; 3.40.50.880; -; 1. DR InterPro; IPR029062; Class_I_gatase-like. DR InterPro; IPR002161; PdxT/SNO. DR InterPro; IPR021196; PdxT/SNO_CS. DR NCBIfam; TIGR03800; PLP_synth_Pdx2; 1. DR PANTHER; PTHR31559; PYRIDOXAL 5'-PHOSPHATE SYNTHASE SUBUNIT SNO; 1. DR PANTHER; PTHR31559:SF0; PYRIDOXAL 5'-PHOSPHATE SYNTHASE SUBUNIT SNO1-RELATED; 1. DR Pfam; PF01174; SNO; 1. DR PIRSF; PIRSF005639; Glut_amidoT_SNO; 1. DR SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 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..222 FT /note="Probable pyridoxal 5'-phosphate synthase subunit FT SNO2" FT /id="PRO_0000135620" FT ACT_SITE 91 FT /note="Nucleophile" FT /evidence="ECO:0000250|UniProtKB:P37528" FT ACT_SITE 197 FT /note="Charge relay system" FT /evidence="ECO:0000250|UniProtKB:P37528" FT ACT_SITE 199 FT /note="Charge relay system" FT /evidence="ECO:0000250|UniProtKB:P37528" FT BINDING 58..60 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000250|UniProtKB:P37528" FT BINDING 120 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000250|UniProtKB:P37528" FT BINDING 151..152 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000250|UniProtKB:P37528" SQ SEQUENCE 222 AA; 25208 MW; 6755EE1D826CAABA CRC64; MTVVIGVLAL QGAFIEHVRH VEKCIVENRD FYEKKLSVMT VKDKNQLAQC DALIIPGGES TAMSLIAERT GFYDDLYAFV HNPSKVTWGT CAGMIYISQQ LSNEEKLVKT LNLLKVKVKR NAFGRQAQSS TRICDFSNFI PHCNDFPATF IRAPVIEEVL DPEHVQVLYK LDGKDNGGQE LIVAAKQKNN ILATSFHPEL AENDIRFHDW FIREFVLKNY SK //