IXTPA_NEIMA
ID IXTPA_NEIMA Reviewed; 199 AA.
AC Q9JVG5; A1IQQ2;
DT 30-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2000, sequence version 1.
DT 03-AUG-2022, entry version 104.
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=NMA0849;
OS Neisseria meningitidis serogroup A / serotype 4A (strain DSM 15465 /
OS Z2491).
OC Bacteria; Proteobacteria; Betaproteobacteria; Neisseriales; Neisseriaceae;
OC Neisseria.
OX NCBI_TaxID=122587;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 15465 / Z2491;
RX PubMed=10761919; DOI=10.1038/35006655;
RA Parkhill J., Achtman M., James K.D., Bentley S.D., Churcher C.M.,
RA Klee S.R., Morelli G., Basham D., Brown D., Chillingworth T., Davies R.M.,
RA Davis P., Devlin K., Feltwell T., Hamlin N., Holroyd S., Jagels K.,
RA Leather S., Moule S., Mungall K.L., Quail M.A., Rajandream M.A.,
RA Rutherford K.M., Simmonds M., Skelton J., Whitehead S., Spratt B.G.,
RA Barrell B.G.;
RT "Complete DNA sequence of a serogroup A strain of Neisseria meningitidis
RT Z2491.";
RL Nature 404:502-506(2000).
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}.
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DR EMBL; AL157959; CAM08086.1; -; Genomic_DNA.
DR PIR; E81930; E81930.
DR RefSeq; WP_002214246.1; NC_003116.1.
DR AlphaFoldDB; Q9JVG5; -.
DR SMR; Q9JVG5; -.
DR EnsemblBacteria; CAM08086; CAM08086; NMA0849.
DR KEGG; nma:NMA0849; -.
DR HOGENOM; CLU_082080_0_0_4; -.
DR OMA; DCFADDT; -.
DR BioCyc; NMEN122587:NMA_RS04260-MON; -.
DR Proteomes; UP000000626; 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.
FT CHAIN 1..199
FT /note="dITP/XTP pyrophosphatase"
FT /id="PRO_0000178199"
FT ACT_SITE 73
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 12..17
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 73
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 74
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 157..160
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 180
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 185..186
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
SQ SEQUENCE 199 AA; 21216 MW; 86B70E2E49E01FDB CRC64;
MSEKPEKIVL ASGNAGKLKE FGNLFEPYGI TVLPQSEFSI PECPEPYSTF VENALAKARH
AAGHSGLPAL ADDSGICAAA LNGAPGIHSA RYAGSNPKSD TANNLKLAAE LAGKADKSCC
YVCVLVFVRH KDDPRPIIAE GVWHGQWNGV PAGENGFGYD PYFYLPGHGK TAAELDSEVK
NRESHRAQAL AELLRKLAL
