ID A3PB01_PROM0 Unreviewed; 204 AA. AC A3PB01; DT 03-APR-2007, integrated into UniProtKB/TrEMBL. DT 03-APR-2007, sequence version 1. DT 02-SEP-2026, entry version 104. DE RecName: Full=dITP/XTP pyrophosphatase {ECO:0000256|HAMAP-Rule:MF_01405}; DE EC=3.6.1.66 {ECO:0000256|HAMAP-Rule:MF_01405}; DE AltName: Full=Non-canonical purine NTP pyrophosphatase {ECO:0000256|HAMAP-Rule:MF_01405}; DE AltName: Full=Non-standard purine NTP pyrophosphatase {ECO:0000256|HAMAP-Rule:MF_01405}; DE AltName: Full=Nucleoside-triphosphate diphosphatase {ECO:0000256|HAMAP-Rule:MF_01405}; DE AltName: Full=Nucleoside-triphosphate pyrophosphatase {ECO:0000256|HAMAP-Rule:MF_01405}; DE Short=NTPase {ECO:0000256|HAMAP-Rule:MF_01405}; GN OrderedLocusNames=P9301_03031 {ECO:0000313|EMBL:ABO16926.1}; OS Prochlorococcus marinus (strain MIT 9301). OC Bacteria; Bacillati; Cyanobacteriota; Cyanophyceae; Synechococcales; OC Prochlorococcaceae; Prochlorococcus. OX NCBI_TaxID=167546 {ECO:0000313|EMBL:ABO16926.1, ECO:0000313|Proteomes:UP000001430}; RN [1] {ECO:0000313|EMBL:ABO16926.1, ECO:0000313|Proteomes:UP000001430} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=MIT 9301 {ECO:0000313|EMBL:ABO16926.1, RC ECO:0000313|Proteomes:UP000001430}; RX PubMed=18159947; DOI=10.1371/journal.pgen.0030231; RA Kettler G.C., Martiny A.C., Huang K., Zucker J., Coleman M.L., Rodrigue S., RA Chen F., Lapidus A., Ferriera S., Johnson J., Steglich C., Church G.M., RA Richardson P., Chisholm S.W.; RT "Patterns and implications of gene gain and loss in the evolution of RT Prochlorococcus."; RL PLoS Genet. 3:2515-2528(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:0000256|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:0000256|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:0000256|ARBA:ARBA00052017, ECO:0000256|HAMAP- CC 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:0000256|ARBA:ARBA00051875, ECO:0000256|HAMAP- CC Rule:MF_01405}; CC -!- COFACTOR: CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000256|HAMAP- CC Rule:MF_01405}; CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01405}; CC -!- SUBUNIT: Homodimer. {ECO:0000256|ARBA:ARBA00011738, ECO:0000256|HAMAP- CC Rule:MF_01405}. CC -!- SIMILARITY: Belongs to the HAM1 NTPase family. CC {ECO:0000256|ARBA:ARBA00008023, ECO:0000256|HAMAP-Rule:MF_01405, CC ECO:0000256|RuleBase:RU003781}. 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; CP000576; ABO16926.1; -; Genomic_DNA. DR AlphaFoldDB; A3PB01; -. DR STRING; 167546.P9301_03031; -. DR KEGG; pmg:P9301_03031; -. DR eggNOG; COG0127; Bacteria. DR HOGENOM; CLU_082080_0_2_3; -. DR Proteomes; UP000001430; 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 {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_01405}; KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01405}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP- KW Rule:MF_01405}; KW Nucleotide metabolism {ECO:0000256|ARBA:ARBA00023080, ECO:0000256|HAMAP- KW Rule:MF_01405}; KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP- KW Rule:MF_01405}; Reference proteome {ECO:0000313|Proteomes:UP000001430}. FT ACT_SITE 80 FT /note="Proton acceptor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 21..26 FT /ligand="substrate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 51 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 80 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 81 FT /ligand="substrate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 159..162 FT /ligand="substrate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 182 FT /ligand="substrate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" FT BINDING 187..188 FT /ligand="substrate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405" SQ SEQUENCE 204 AA; 22848 MW; BB39CE2EFF718467 CRC64; MGSRIYKYGN KIRMKNLYLA SKNKGKIEEY KKLLAGVNCK LLLQPESLEV EEDGLTFRDN AIKKASEVSR KTNNFSIADD SGICIEALGG KPGIYSSRYA ENDQKRIERV LRELDGVQNR SAFFIANICI CSPNGEVIIE SEAKCHGNII LNPRGKSGFG YDPIFEESST RLTFAEMNND IKDSCSHRGK ALKKIIPDLI EIFS //