ID IXTPA_FRAAA Reviewed; 202 AA. AC Q0RQL6; DT 05-FEB-2008, integrated into UniProtKB/Swiss-Prot. DT 05-SEP-2006, sequence version 1. DT 02-SEP-2026, entry version 101. DE RecName: Full=dITP/XTP pyrophosphatase {ECO:0000255|HAMAP-Rule:MF_01405}; DE EC=3.6.1.66 {ECO:0000255|HAMAP-Rule:MF_01405}; DE AltName: Full=Non-canonical purine NTP pyrophosphatase {ECO:0000255|HAMAP-Rule:MF_01405}; DE AltName: Full=Non-standard purine NTP pyrophosphatase {ECO:0000255|HAMAP-Rule:MF_01405}; DE AltName: Full=Nucleoside-triphosphate diphosphatase {ECO:0000255|HAMAP-Rule:MF_01405}; DE AltName: Full=Nucleoside-triphosphate pyrophosphatase {ECO:0000255|HAMAP-Rule:MF_01405}; DE Short=NTPase {ECO:0000255|HAMAP-Rule:MF_01405}; GN OrderedLocusNames=FRAAL1502; OS Frankia alni (strain DSM 45986 / CECT 9034 / ACN14a). OC Bacteria; Bacillati; Actinomycetota; Actinomycetes; Frankiales; OC Frankiaceae; Frankia. OX NCBI_TaxID=326424; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=DSM 45986 / CECT 9034 / ACN14a; RX PubMed=17151343; DOI=10.1101/gr.5798407; RA Normand P., Lapierre P., Tisa L.S., Gogarten J.P., Alloisio N., RA Bagnarol E., Bassi C.A., Berry A.M., Bickhart D.M., Choisne N., Couloux A., RA Cournoyer B., Cruveiller S., Daubin V., Demange N., Francino M.P., RA Goltsman E., Huang Y., Kopp O.R., Labarre L., Lapidus A., Lavire C., RA Marechal J., Martinez M., Mastronunzio J.E., Mullin B.C., Niemann J., RA Pujic P., Rawnsley T., Rouy Z., Schenowitz C., Sellstedt A., Tavares F., RA Tomkins J.P., Vallenet D., Valverde C., Wall L.G., Wang Y., Medigue C., RA Benson D.R.; RT "Genome characteristics of facultatively symbiotic Frankia sp. strains RT reflect host range and host plant biogeography."; RL Genome Res. 17:7-15(2007). CC -!- FUNCTION: Pyrophosphatase that catalyzes the hydrolysis of nucleoside CC triphosphates to their monophosphate derivatives, with a high CC preference for the non-canonical purine nucleotides XTP (xanthosine CC triphosphate), dITP (deoxyinosine triphosphate) and ITP. Seems to CC function as a house-cleaning enzyme that removes non-canonical purine CC nucleotides from the nucleotide pool, thus preventing their CC incorporation into DNA/RNA and avoiding chromosomal lesions. CC {ECO:0000255|HAMAP-Rule:MF_01405}. CC -!- CATALYTIC ACTIVITY: CC Reaction=XTP + H2O = XMP + diphosphate + H(+); Xref=Rhea:RHEA:28610, CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019, CC ChEBI:CHEBI:57464, ChEBI:CHEBI:61314; EC=3.6.1.66; CC Evidence={ECO:0000255|HAMAP-Rule:MF_01405}; CC -!- CATALYTIC ACTIVITY: CC Reaction=dITP + H2O = dIMP + diphosphate + H(+); Xref=Rhea:RHEA:28342, CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019, CC ChEBI:CHEBI:61194, ChEBI:CHEBI:61382; EC=3.6.1.66; CC Evidence={ECO:0000255|HAMAP-Rule:MF_01405}; CC -!- CATALYTIC ACTIVITY: CC Reaction=ITP + H2O = IMP + diphosphate + H(+); Xref=Rhea:RHEA:29399, CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019, CC ChEBI:CHEBI:58053, ChEBI:CHEBI:61402; EC=3.6.1.66; CC Evidence={ECO:0000255|HAMAP-Rule:MF_01405}; CC -!- COFACTOR: CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01405}; CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01405}; CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01405}. CC -!- SIMILARITY: Belongs to the HAM1 NTPase family. {ECO:0000255|HAMAP- CC Rule:MF_01405}. 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; CT573213; CAJ60158.1; -; Genomic_DNA. DR RefSeq; WP_011602692.1; NC_008278.1. DR AlphaFoldDB; Q0RQL6; -. DR SMR; Q0RQL6; -. DR STRING; 326424.FRAAL1502; -. DR KEGG; fal:FRAAL1502; -. DR eggNOG; COG0127; Bacteria. DR HOGENOM; CLU_082080_0_1_11; -. DR OrthoDB; 9807456at2; -. DR Proteomes; UP000000657; Chromosome. DR GO; GO:0005829; C:cytosol; IEA:TreeGrafter. DR GO; GO:0035870; F:dITP diphosphatase activity; IEA:UniProtKB-UniRule. DR GO; GO:0036220; F:ITP diphosphatase activity; IEA:UniProtKB-UniRule. DR GO; GO:0017111; F:ribonucleoside triphosphate phosphatase activity; IEA:InterPro. DR GO; GO:0036222; F:XTP diphosphatase activity; IEA:UniProtKB-UniRule. DR GO; GO:0009146; P:purine nucleoside triphosphate catabolic process; IEA:UniProtKB-UniRule. DR CDD; cd00515; HAM1; 1. DR FunFam; 3.90.950.10:FF:000001; dITP/XTP pyrophosphatase; 1. DR Gene3D; 3.90.950.10; -; 1. DR HAMAP; MF_01405; Non_canon_purine_NTPase; 1. DR InterPro; IPR020922; dITP/XTP_pyrophosphatase. DR InterPro; IPR029001; ITPase-like_fam. DR InterPro; IPR002637; RdgB/HAM1. DR NCBIfam; TIGR00042; RdgB/HAM1 family non-canonical purine NTP pyrophosphatase; 1. DR PANTHER; PTHR11067:SF9; INOSINE TRIPHOSPHATE PYROPHOSPHATASE; 1. DR PANTHER; PTHR11067; INOSINE TRIPHOSPHATE PYROPHOSPHATASE/HAM1 PROTEIN; 1. DR Pfam; PF01725; Ham1p_like; 1. DR SUPFAM; SSF52972; ITPase-like; 1. PE 3: Inferred from homology; KW Hydrolase; Magnesium; Metal-binding; Nucleotide metabolism; KW Nucleotide-binding; Reference proteome. FT CHAIN 1..202 FT /note="dITP/XTP pyrophosphatase" FT /id="PRO_1000068422" FT ACT_SITE 68 FT /note="Proton acceptor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 7..12 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 68 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 69 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 156..159 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 179 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 184..185 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" SQ SEQUENCE 202 AA; 21355 MW; 7C9206AB34DD1E6F CRC64; MRVVLASRNE AKLTELRRIL AASGLSVELV ALPDGEEVAE TGTTFAENAL IKARAAADQT GLPAVADDSG LAVDELSGMP GVRSARWSGR RDGTRVERDE ANNALLLAQL DDVPPERRGA AFVCAAALVT PAGVERVTHG ELRGVLLTEP RGQAGFGYDP LFLADGQTRT NAELTAAEKD AISHRGLAFR DLATLLREVL TS //