ID   F8LBA9_9BACT            Unreviewed;       200 AA.
AC   F8LBA9;
DT   21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT   21-SEP-2011, sequence version 1.
DT   12-AUG-2020, 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=hamA {ECO:0000313|EMBL:CCB90773.1};
GN   ORFNames=WCH_BS10310 {ECO:0000313|EMBL:CCB90773.1};
OS   Waddlia chondrophila 2032/99.
OC   Bacteria; Chlamydiae; Parachlamydiales; Waddliaceae; Waddlia.
OX   NCBI_TaxID=765953 {ECO:0000313|EMBL:CCB90773.1};
RN   [1] {ECO:0000313|EMBL:CCB90773.1}
RP   NUCLEOTIDE SEQUENCE.
RC   STRAIN=2032/99 {ECO:0000313|EMBL:CCB90773.1};
RA   Collingro A., Tischler P., Weinmaier T., Penz T., Heinz E., Brunham R.C.,
RA   Read T.D., Bavoil P.M., Sachse K., Kahane S., Friedman M.G., Rattei T.,
RA   Myers G.S.A., Horn M.;
RT   "Unity in variety -- the pan-genome of the Chlamydiae.";
RL   Submitted (MAY-2011) to the EMBL/GenBank/DDBJ databases.
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}.
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DR   EMBL; FR872638; CCB90773.1; -; Genomic_DNA.
DR   GO; GO:0035870; F:dITP diphosphatase activity; IEA:UniProtKB-EC.
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 {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_01405,
KW   ECO:0000256|RuleBase:RU003781, ECO:0000313|EMBL:CCB90773.1};
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}.
FT   REGION          7..12
FT                   /note="Substrate binding"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   REGION          153..156
FT                   /note="Substrate binding"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   REGION          181..182
FT                   /note="Substrate binding"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   ACT_SITE        70
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   METAL           41
FT                   /note="Magnesium"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   METAL           70
FT                   /note="Magnesium"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   BINDING         71
FT                   /note="Substrate; via amide nitrogen"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
FT   BINDING         176
FT                   /note="Substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01405"
SQ   SEQUENCE   200 AA;  22620 MW;  30CDEA02925288CA CRC64;
     MELILATHNL HKIREFRQIL KEVKGLDLIS LRNFPDYQLP EETGKTFQEN ADLKALHAAK
     MLKAIVLADD SGLVVPALQG APGIYSARYA SSDATDKENR EKLMQEMEKF EDLDRSAYYE
     CCITIAGPEG ILKTAKATCE GLIGEQEKGR NGFGYDPIFI KHDYDKTFAE LEEQTKNRIS
     HRRKALDKIL AFLEAQIPSE
//