ID IXTPA_RHORT Reviewed; 201 AA. AC Q2RN61; DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot. DT 24-JAN-2006, sequence version 1. DT 25-MAY-2022, entry version 89. 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=Rru_A3640; OS Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / OS NCIMB 8255 / S1). OC Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales; OC Rhodospirillaceae; Rhodospirillum. OX NCBI_TaxID=269796; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1; RX PubMed=21886856; DOI=10.4056/sigs.1804360; RA Munk A.C., Copeland A., Lucas S., Lapidus A., Del Rio T.G., Barry K., RA Detter J.C., Hammon N., Israni S., Pitluck S., Brettin T., Bruce D., RA Han C., Tapia R., Gilna P., Schmutz J., Larimer F., Land M., Kyrpides N.C., RA Mavromatis K., Richardson P., Rohde M., Goeker M., Klenk H.P., Zhang Y., RA Roberts G.P., Reslewic S., Schwartz D.C.; RT "Complete genome sequence of Rhodospirillum rubrum type strain (S1)."; RL Stand. Genomic Sci. 4:293-302(2011). 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=H2O + XTP = diphosphate + H(+) + XMP; 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=H2O + ITP = diphosphate + H(+) + IMP; 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; CC Evidence={ECO:0000255|HAMAP-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; CP000230; ABC24434.1; -; Genomic_DNA. DR RefSeq; WP_011391387.1; NC_007643.1. DR RefSeq; YP_428721.1; NC_007643.1. DR AlphaFoldDB; Q2RN61; -. DR SMR; Q2RN61; -. DR STRING; 269796.Rru_A3640; -. DR EnsemblBacteria; ABC24434; ABC24434; Rru_A3640. DR KEGG; rru:Rru_A3640; -. DR PATRIC; fig|269796.9.peg.3762; -. DR eggNOG; COG0127; Bacteria. DR HOGENOM; CLU_082080_0_0_5; -. DR OMA; DCFADDT; -. DR OrthoDB; 1824064at2; -. DR PhylomeDB; Q2RN61; -. DR Proteomes; UP000001929; Chromosome. DR GO; GO:0035870; F:dITP diphosphatase activity; IEA:UniProtKB-EC. DR GO; GO:0036220; F:ITP diphosphatase activity; IEA:RHEA. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW. DR GO; GO:0017111; F:nucleoside-triphosphatase activity; IEA:InterPro. DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW. DR GO; GO:0036222; F:XTP diphosphatase activity; IEA:UniProtKB-EC. DR GO; GO:0009117; P:nucleotide metabolic process; IEA:UniProtKB-KW. DR GO; GO:0009146; P:purine nucleoside triphosphate catabolic process; IEA:UniProtKB-UniRule. DR CDD; cd00515; HAM1; 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; IPR002637; Ham1p-like. DR InterPro; IPR029001; ITPase-like_fam. DR PANTHER; PTHR11067; PTHR11067; 1. DR Pfam; PF01725; Ham1p_like; 1. DR SUPFAM; SSF52972; SSF52972; 1. DR TIGRFAMs; TIGR00042; TIGR00042; 1. PE 3: Inferred from homology; KW Hydrolase; Magnesium; Metal-binding; Nucleotide metabolism; KW Nucleotide-binding; Reference proteome. FT CHAIN 1..201 FT /note="dITP/XTP pyrophosphatase" FT /id="PRO_1000087380" FT REGION 16..21 FT /note="Substrate binding" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT REGION 158..161 FT /note="Substrate binding" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT REGION 186..187 FT /note="Substrate binding" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT ACT_SITE 77 FT /note="Proton acceptor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT METAL 48 FT /note="Magnesium" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT METAL 77 FT /note="Magnesium" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 78 FT /note="Substrate; via amide nitrogen" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" FT BINDING 181 FT /note="Substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405" SQ SEQUENCE 201 AA; 20884 MW; C339D1A4D7F47802 CRC64; MAMSRRLVES PLVVASHNAG KVREIAELIA PFGLEARSAA SLDLPEPEET GSSFVENALL KAHAAARATG LPALADDSGL AVSALGGDPG IYSARWAGPT KDFALAMATI NHLLGDNPDR SAHFVCALAL AWPDGHAETF EGRVDGVLVW PPRGDQGFGY DPMFLGEGAA ETFGEMDPAA KHAISHRARA FALLVAACLG G //