Thymidine kinase from herpesvirus is a sub-family of thymidine kinases that catalyses the transfer of phospho group of ATP to thymidine to generate thymidine monophosphate, which serves as a substrate during viral DNA replication.[2][3]
| Thymidine kinase from herpesvirus | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Structure of thymidine kinase from herpesvirus.[1] | |||||||||||
| Identifiers | |||||||||||
| Symbol | Herpes_TK | ||||||||||
| Pfam | PF00693 | ||||||||||
| InterPro | IPR001889 | ||||||||||
| SCOP2 | 1kin / SCOPe / SUPFAM | ||||||||||
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Its presence in herpesvirus-infected cells is used to activate a range of antivirals against herpes infection, and thus specifically target the therapy towards infected cells only.
Such antivirals include:
- Purine analogues of guanine: Aciclovir, Famciclovir, Ganciclovir, Penciclovir, Valaciclovir, Valganciclovir
- Vidarabine
- Pyrimidine analogues of uridine: Idoxuridine, Trifluridine
- Brivudine
Mutations in the gene coding thymidine kinase in herpes viruses can endow the virus with resistance to aciclovir. In these situations, alternative medications that are of use include other guanine analogues such as famciclovir, valaciclovir and penciclovir.[4][5]
References edit
- ^ Champness JN, Bennett MS, Wien F, Visse R, Summers WC, Herdewijn P, et al. (August 1998). "Exploring the active site of herpes simplex virus type-1 thymidine kinase by X-ray crystallography of complexes with aciclovir and other ligands". Proteins. 32 (3): 350–361. doi:10.1002/(SICI)1097-0134(19980815)32:3<350::AID-PROT10>3.0.CO;2-8. PMID 9715911. S2CID 20167407.
- ^ Vogt J, Perozzo R, Pautsch A, Prota A, Schelling P, Pilger B, et al. (December 2000). "Nucleoside binding site of herpes simplex type 1 thymidine kinase analyzed by X-ray crystallography". Proteins. 41 (4): 545–553. doi:10.1002/1097-0134(20001201)41:4<545::AID-PROT110>3.0.CO;2-8. PMID 11056041. S2CID 2829079.
- ^ Brown DG, Visse R, Sandhu G, Davies A, Rizkallah PJ, Melitz C, et al. (October 1995). "Crystal structures of the thymidine kinase from herpes simplex virus type-1 in complex with deoxythymidine and ganciclovir". Nature Structural Biology. 2 (10): 876–881. doi:10.1038/nsb1095-876. PMID 7552712. S2CID 3223579.
- ^ Frobert E, Ooka T, Cortay JC, Lina B, Thouvenot D, Morfin F (March 2005). "Herpes simplex virus thymidine kinase mutations associated with resistance to acyclovir: a site-directed mutagenesis study". Antimicrobial Agents and Chemotherapy. 49 (3): 1055–1059. doi:10.1128/AAC.49.3.1055-1059.2005. PMC 549244. PMID 15728902.
- ^ Suzuki M, Okuda T, Shiraki K (November 2006). "Synergistic antiviral activity of acyclovir and vidarabine against herpes simplex virus types 1 and 2 and varicella-zoster virus". Antiviral Research. 72 (2): 157–161. doi:10.1016/j.antiviral.2006.05.001. PMID 16797734.
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