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Q3KSQ2

- KITH_EBVG

UniProt

Q3KSQ2 - KITH_EBVG

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Protein
Thymidine kinase
Gene
TK, BXLF1
Organism
Epstein-Barr virus (strain GD1) (HHV-4) (Human herpesvirus 4)
Status
Reviewed - Annotation score: 3 out of 5 - Experimental evidence at protein leveli

Functioni

In latent infection, may allow the virus to be reactivated and to grow in cells lacking a high concentration of phosphorylated nucleic acid precursors, such as memory B-cells that do not replicate their genome. Catalyzes the transfer of the gamma-phospho group of ATP to thymidine to generate dTMP in the salvage pathway of pyrimidine synthesis. The dTMP serves as a substrate for DNA polymerase during DNA replication By similarity.

Catalytic activityi

ATP + thymidine = ADP + thymidine 5'-phosphate.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei317 – 3171Proton acceptor Reviewed prediction
Binding sitei355 – 3551Substrate By similarity
Binding sitei402 – 4021Substrate By similarity
Binding sitei445 – 4451ATP By similarity

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi291 – 2988ATP By similarity

GO - Molecular functioni

  1. ATP binding Source: UniProtKB-KW
  2. protein binding Source: IntAct
  3. thymidine kinase activity Source: UniProtKB-EC
Complete GO annotation...

GO - Biological processi

  1. DNA replication Source: UniProtKB-KW
  2. TMP biosynthetic process Source: InterPro
Complete GO annotation...

Keywords - Molecular functioni

Kinase, Transferase

Keywords - Biological processi

DNA synthesis

Keywords - Ligandi

ATP-binding, Nucleotide-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Thymidine kinase (EC:2.7.1.21)
Gene namesi
Name:TK
ORF Names:BXLF1
OrganismiEpstein-Barr virus (strain GD1) (HHV-4) (Human herpesvirus 4)
Taxonomic identifieri10376 [NCBI]
Taxonomic lineageiVirusesdsDNA viruses, no RNA stageHerpesviralesHerpesviridaeGammaherpesvirinaeLymphocryptovirus
Virus hostiHomo sapiens (Human) [TaxID: 9606]
ProteomesiUP000007641: Genome

Subcellular locationi

Virion tegument. Host nucleus By similarity
Note: Localizes to the centrosome and more precisely to the periphery of the centriole, tightly encircling the tubulin-rich centrioles By similarity.

GO - Cellular componenti

  1. host cell nucleus Source: UniProtKB-SubCell
  2. viral tegument Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Host nucleus, Virion, Virion tegument

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 607607Thymidine kinase
PRO_0000375958Add
BLAST

Expressioni

Keywords - Developmental stagei

Early protein

Interactioni

Subunit structurei

Homodimer By similarity.

Binary interactionsi

WithEntry#Exp.IntActNotes
BGLF4P0C7312EBI-2621028,EBI-2621032

Protein-protein interaction databases

IntActiQ3KSQ2. 8 interactions.

Family & Domainsi

Sequence similaritiesi

Family and domain databases

Gene3Di3.40.50.300. 1 hit.
InterProiIPR001889. Herpes_TK.
IPR013672. Herpes_TK_C.
IPR027417. P-loop_NTPase.
[Graphical view]
PfamiPF00693. Herpes_TK. 1 hit.
PF08465. Herpes_TK_C. 1 hit.
[Graphical view]
SUPFAMiSSF52540. SSF52540. 1 hit.

Sequencei

Sequence statusi: Complete.

Q3KSQ2-1 [UniParc]FASTAAdd to Basket

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MAGFPGKEAG PPGGWRKCQE DESPENERHE NFYAEIDDFA PSVLTPTGSD    50
SGAGEEDDDG LYQVPTHWPP LMAPTGLSGE RVPCRTQAAV TSNTGNSPGS 100
RHTSCPFTLP RGAQPPAPAH QKPTAPTPKP RSRECGPSKT PDPFSWFRKT 150
SCTEGGADST SRSFMYQKGF EEGLAGLGLD DKSDCESEDE SNFRRPSSHS 200
ALKQKNGGKG KPSGLFEHLA AHGREFSKLS KHAAQLKRLS GSVMNVLNLD 250
DAQDTRQAKA QRKESTRVPI VIHLTNHVPV IKPACSLFLE GAPGVGKTTM 300
LNHLKAVFGD LTIVVPEPMR YWTHVYENAI KAMHKNVTRA RHGREDTSAE 350
VLACQMKFTT PFRVLASRKR SLLVTESGAR SVAPLDCWIL HDRHLLSASV 400
VFPLMLLRSQ LLSYSDFIQV LATFTADPGD TIVWMKLNVE ENMRRLKKRG 450
RKHESGLDAG YLKSVNDAYH AVYCAWLLTQ YFAPEDIVKV CAGLTTITTV 500
CHQSHTPIIR SGVAEKLYKN SIYSVLKEVI QPYRADAVLL EVCLAFTRTL 550
AYLQFVLVDL SEFQDDLPGC WTEIYMQALK NPAIRSQFFD WAGLSKVISD 600
FERGNRD 607
Length:607
Mass (Da):67,207
Last modified:November 8, 2005 - v1
Checksum:i163836CEDA39C52C
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AY961628 Genomic DNA. Translation: AAY41147.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AY961628 Genomic DNA. Translation: AAY41147.1 .

3D structure databases

ModBasei Search...

Protein-protein interaction databases

IntActi Q3KSQ2. 8 interactions.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Family and domain databases

Gene3Di 3.40.50.300. 1 hit.
InterProi IPR001889. Herpes_TK.
IPR013672. Herpes_TK_C.
IPR027417. P-loop_NTPase.
[Graphical view ]
Pfami PF00693. Herpes_TK. 1 hit.
PF08465. Herpes_TK_C. 1 hit.
[Graphical view ]
SUPFAMi SSF52540. SSF52540. 1 hit.
ProtoNeti Search...

Publicationsi

  1. "Genomic sequence analysis of Epstein-Barr virus strain GD1 from a nasopharyngeal carcinoma patient."
    Zeng M.-S., Li D.-J., Liu Q.-L., Song L.-B., Li M.-Z., Zhang R.-H., Yu X.-J., Wang H.-M., Ernberg I., Zeng Y.-X.
    J. Virol. 79:15323-15330(2005) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Entry informationi

Entry nameiKITH_EBVG
AccessioniPrimary (citable) accession number: Q3KSQ2
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 26, 2009
Last sequence update: November 8, 2005
Last modified: June 11, 2014
This is version 39 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programViral Protein Annotation Program

Miscellaneousi

Miscellaneous

Phosphorylates and thereby activates certain drugs like acyclovir (ACV), valacyclovir, and famciclovir to a toxic form, that leads to successful suppression of the infection, while the uninfected cell does not have this ability because it lacks TK By similarity.

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi