IXTPA_MYCMS
ID IXTPA_MYCMS Reviewed; 200 AA.
AC Q6MT00;
DT 26-APR-2005, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 96.
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=MSC_0616;
OS Mycoplasma mycoides subsp. mycoides SC (strain PG1).
OC Bacteria; Tenericutes; Mollicutes; Mycoplasmataceae; Mycoplasma.
OX NCBI_TaxID=272632;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PG1;
RX PubMed=14762060; DOI=10.1101/gr.1673304;
RA Westberg J., Persson A., Holmberg A., Goesmann A., Lundeberg J.,
RA Johansson K.-E., Pettersson B., Uhlen M.;
RT "The genome sequence of Mycoplasma mycoides subsp. mycoides SC type strain
RT PG1T, the causative agent of contagious bovine pleuropneumonia (CBPP).";
RL Genome Res. 14:221-227(2004).
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; BX293980; CAE77238.1; -; Genomic_DNA.
DR RefSeq; NP_975596.1; NC_005364.2.
DR AlphaFoldDB; Q6MT00; -.
DR SMR; Q6MT00; -.
DR STRING; 272632.MSC_0616; -.
DR EnsemblBacteria; CAE77238; CAE77238; MSC_0616.
DR KEGG; mmy:MSC_0616; -.
DR PATRIC; fig|272632.4.peg.663; -.
DR eggNOG; COG0127; Bacteria.
DR HOGENOM; CLU_082080_0_0_14; -.
DR OMA; DCFADDT; -.
DR Proteomes; UP000001016; 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..200
FT /note="dITP/XTP pyrophosphatase"
FT /id="PRO_0000178194"
FT ACT_SITE 70
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 10..15
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 41
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 70
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01405"
FT BINDING 71
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"
SQ SEQUENCE 200 AA; 23262 MW; EADD20A8FF455E50 CRC64;
MDKKVIYLAT TNKNKVKEFS EILKDYQIKS LLDIPEYVEI EENKKTFKQN ALLKAKHLAK
YINGVAIGDD TGICVKALND FPGIYSKRWA YPLTNHYDIC NKLLDKLKHI NQLNKRKAYM
TTAIALYDAI NKKQFVYQAR VNGYIDFQVN ESEFGFGYDF IFIPKGYDKA YSLMNSELKN
QISARKKAID KLIEYIDNVK
