ID A0A0K1W1G0_9MOLU Unreviewed; 213 AA.
AC A0A0K1W1G0;
DT 11-NOV-2015, integrated into UniProtKB/TrEMBL.
DT 11-NOV-2015, sequence version 1.
DT 24-JAN-2024, entry version 33.
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 Name=rdgB {ECO:0000313|EMBL:AKX34008.1};
GN ORFNames=SLITO_v1c03540 {ECO:0000313|EMBL:AKX34008.1};
OS Spiroplasma litorale.
OC Bacteria; Mycoplasmatota; Mollicutes; Entomoplasmatales; Spiroplasmataceae;
OC Spiroplasma.
OX NCBI_TaxID=216942 {ECO:0000313|EMBL:AKX34008.1, ECO:0000313|Proteomes:UP000067476};
RN [1] {ECO:0000313|EMBL:AKX34008.1, ECO:0000313|Proteomes:UP000067476}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=TN-1 {ECO:0000313|EMBL:AKX34008.1,
RC ECO:0000313|Proteomes:UP000067476};
RX PubMed=26430038;
RA Lo W.S., Lai Y.C., Lien Y.W., Wang T.H., Kuo C.H.;
RT "Complete Genome Sequence of Spiroplasma litorale TN-1T (DSM 21781), a
RT Bacterium Isolated from a Green-Eyed Horsefly (Tabanus nigrovittatus).";
RL Genome Announc. 3:e01116-15(2015).
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=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:0000256|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:0000256|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:0000256|HAMAP-Rule:MF_01405};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01405};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|HAMAP-Rule:MF_01405};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-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 -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01405}.
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DR EMBL; CP012357; AKX34008.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0K1W1G0; -.
DR STRING; 216942.SLITO_v1c03540; -.
DR KEGG; sll:SLITO_v1c03540; -.
DR PATRIC; fig|216942.3.peg.357; -.
DR Proteomes; UP000067476; Chromosome.
DR GO; GO:0035870; F:dITP diphosphatase activity; IEA:UniProtKB-EC.
DR GO; GO:0036220; F:ITP diphosphatase activity; IEA:UniProtKB-EC.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW.
DR GO; GO:0017111; F:ribonucleoside triphosphate phosphatase activity; IEA:InterPro.
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; 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}; Nucleotide metabolism {ECO:0000256|HAMAP-Rule:MF_01405};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_01405}; Reference proteome {ECO:0000313|Proteomes:UP000067476}.
FT ACT_SITE 82
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 22..27
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 82
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 83
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 169..172
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 192
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT BINDING 197..198
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
SQ SEQUENCE 213 AA; 24441 MW; 5571FDCAA0ACDBAD CRC64;
MWYYINIVSL KGFLYLDIVL ATNNKNKIKE FKSLLNVNNL YSLKDMGIDE ELPENGNTFI
DNALQKARYV ANITNKIVIA DDSGLSICNL NNFPGVHSAR WALPIEDYKI INEMILKKMS
NNNLNSIDQR KSYFTCVIAF VDPINNVEKT FEGRLSGYIS FKQKGSQGFG YDTIFSICNS
DLTLAEMSFE EKNKLSHRKI ACDKFIDFFK NYS
//
