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Protein

dITP/XTP pyrophosphatase

Gene

SCO2902

Organism
Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Protein inferred from homologyi

Functioni

Pyrophosphatase that catalyzes the hydrolysis of nucleoside triphosphates to their monophosphate derivatives, with a high preference for the non-canonical purine nucleotides XTP (xanthosine triphosphate), dITP (deoxyinosine triphosphate) and ITP. Seems to function as a house-cleaning enzyme that removes non-canonical purine nucleotides from the nucleotide pool, thus preventing their incorporation into DNA/RNA and avoiding chromosomal lesions.UniRule annotation

Catalytic activityi

XTP + H2O = XMP + diphosphate.UniRule annotation
dITP + H2O = dIMP + diphosphate.UniRule annotation
ITP + H2O = IMP + diphosphate.UniRule annotation

Cofactori

Mg2+UniRule annotationNote: Binds 1 Mg2+ ion per subunit.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei72Proton acceptorUniRule annotation1
Metal bindingi72MagnesiumUniRule annotation1
Binding sitei73Substrate; via amide nitrogenUniRule annotation1
Binding sitei178SubstrateUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionHydrolase
Biological processNucleotide metabolism
LigandMagnesium, Metal-binding, Nucleotide-binding

Names & Taxonomyi

Protein namesi
Recommended name:
dITP/XTP pyrophosphataseUniRule annotation (EC:3.6.1.66UniRule annotation)
Alternative name(s):
Non-canonical purine NTP pyrophosphataseUniRule annotation
Non-standard purine NTP pyrophosphataseUniRule annotation
Nucleoside-triphosphate diphosphataseUniRule annotation
Nucleoside-triphosphate pyrophosphataseUniRule annotation
Short name:
NTPaseUniRule annotation
Gene namesi
Ordered Locus Names:SCO2902
ORF Names:SCE19A.02c
OrganismiStreptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145)
Taxonomic identifieri100226 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaStreptomycetalesStreptomycetaceaeStreptomycesStreptomyces albidoflavus group
Proteomesi
  • UP000001973 Componenti: Chromosome

Subcellular locationi

GO - Cellular componenti

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001782381 – 200dITP/XTP pyrophosphataseAdd BLAST200

Proteomic databases

PRIDEiQ9S2H9.

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi100226.SCO2902.

Structurei

3D structure databases

ProteinModelPortaliQ9S2H9.
SMRiQ9S2H9.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni8 – 13Substrate bindingUniRule annotation6
Regioni155 – 158Substrate bindingUniRule annotation4
Regioni183 – 184Substrate bindingUniRule annotation2

Sequence similaritiesi

Belongs to the HAM1 NTPase family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4108V82. Bacteria.
COG0127. LUCA.
HOGENOMiHOG000293319.
InParanoidiQ9S2H9.
KOiK02428.
OMAiYDPIFQP.
OrthoDBiPOG091H02BP.
PhylomeDBiQ9S2H9.

Family and domain databases

CDDicd00515. HAM1. 1 hit.
Gene3Di3.90.950.10. 1 hit.
HAMAPiMF_01405. Non_canon_purine_NTPase. 1 hit.
InterProiView protein in InterPro
IPR020922. dITP/XTP_pyrophosphatase.
IPR002637. Ham1p-like.
IPR029001. ITPase-like_fam.
PANTHERiPTHR11067. PTHR11067. 1 hit.
PfamiView protein in Pfam
PF01725. Ham1p_like. 1 hit.
SUPFAMiSSF52972. SSF52972. 1 hit.
TIGRFAMsiTIGR00042. TIGR00042. 1 hit.

Sequencei

Sequence statusi: Complete.

Q9S2H9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTRLILATRN AGKITELRAI LADAGLPHDL VGADAYPHIP DVKETGVTFA
60 70 80 90 100
ENALLKAHAL AEATGLPAVA DDSGLCVDVL NGAPGIFSAR WAGRHGDDQA
110 120 130 140 150
NLDLLLAQIA DIADEHRGAH FACAAALALP DGTERVVEGQ LKGTLRHAPA
160 170 180 190 200
GTGGFGYDPI LQPEGETRTC AELTAEEKNA ISHRGKAFRA LVPVVRELLG
Length:200
Mass (Da):20,890
Last modified:May 1, 2000 - v1
Checksum:iAB1F41B4C448620C
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AL939114 Genomic DNA. Translation: CAB50983.1.
PIRiT36125.
RefSeqiNP_627128.1. NC_003888.3.
WP_011028655.1. NC_003888.3.

Genome annotation databases

EnsemblBacteriaiCAB50983; CAB50983; CAB50983.
GeneIDi1098335.
KEGGisco:SCO2902.
PATRICifig|100226.15.peg.2961.

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiIXTPA_STRCO
AccessioniPrimary (citable) accession number: Q9S2H9
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 30, 2002
Last sequence update: May 1, 2000
Last modified: June 7, 2017
This is version 92 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families