IXTPA_STRA3
ID IXTPA_STRA3 Reviewed; 324 AA.
AC Q8E3V8;
DT 26-APR-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2003, sequence version 1.
DT 03-AUG-2022, entry version 99.
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=gbs1648;
OS Streptococcus agalactiae serotype III (strain NEM316).
OC Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC Streptococcus.
OX NCBI_TaxID=211110;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NEM316;
RX PubMed=12354221; DOI=10.1046/j.1365-2958.2002.03126.x;
RA Glaser P., Rusniok C., Buchrieser C., Chevalier F., Frangeul L., Msadek T.,
RA Zouine M., Couve E., Lalioui L., Poyart C., Trieu-Cuot P., Kunst F.;
RT "Genome sequence of Streptococcus agalactiae, a pathogen causing invasive
RT neonatal disease.";
RL Mol. Microbiol. 45:1499-1513(2002).
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, ECO:0000305}.
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DR EMBL; AL766852; CAD47307.1; -; Genomic_DNA.
DR RefSeq; WP_000167813.1; NC_004368.1.
DR AlphaFoldDB; Q8E3V8; -.
DR SMR; Q8E3V8; -.
DR STRING; 211110.gbs1648; -.
DR EnsemblBacteria; CAD47307; CAD47307; CAD47307.
DR GeneID; 66886445; -.
DR KEGG; san:gbs1648; -.
DR eggNOG; COG0127; Bacteria.
DR HOGENOM; CLU_863088_0_0_9; -.
DR OMA; DNWFIGK; -.
DR Proteomes; UP000000823; 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..324
FT /note="dITP/XTP pyrophosphatase"
FT /id="PRO_0000178235"
FT REGION 1..127
FT /note="Unknown"
FT REGION 128..324
FT /note="NTP pyrophosphatase"
FT ACT_SITE 193
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 131..136
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 164
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 193
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 194
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 277..280
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 300
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 305..306
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
SQ SEQUENCE 324 AA; 36463 MW; 8B7A6E2112A11DCD CRC64;
MTKTIFESKT EGNWFLGSFQ AFNYFTCFGN DESYEAIQDV FHRLLSTLKV EGLQLHVVQM
TSDFQLLAFL VDMINQEYSR HIKVTQHKGA ILVSEDDQLF LVHLPKEGTS LEKFFDLKND
NNFGDTILIA THNEGKTKEF RELFGKLGLK VENLNDYPDL PEVEETGMTF EENARLKAET
ISKLTGKMVI SDDSGLKVDA LGGLPGVWSA RFSGPDATDA RNNAKLLHEL AMVFDKERRS
AQFHTTLVVS APNKESLVVE AEWPGYIGTE PKGENGFGYD PLFIVGEGSR TAAELSAQEK
NNLSHRGQAV RKLMEVFPKW QLEN
