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Thymidine kinase 1

Introduction

Thymidine kinase 1, soluble (gene name TK1), is a human thymidine kinase.[1]

Two forms of this protein have been identified in animal cells, one in cytosol and one in mitochondria. Activity of the cytosolic enzyme is high in proliferating cells and peaks during the S-phase of the cell cycle; it is very low in resting cells.

Interactions

Interactions

Thymidine kinase 1 has been shown to interact with P21.[2]

Interactive pathway map

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles.[Β§ 1]

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Fluorouracil (5-FU) Activity edit
  1. ↑ The interactive pathway map can be edited at WikiPathways: “FluoropyrimidineActivity_WP1601”.
Thymidine Kinase 1 in Cancer

Thymidine Kinase 1 in Cancer

Thymidine kinase has been making a growing impact in the cancer research community. It has been found that elevated blood serum levels of TK-1 are associated the presence of many types of malignancy, furthermore, TK-1 has been found to be elevated in serum even before clinical symptoms appear.[3] This offers the potential for earlier therapy. Elevations in serum TK-1 have been found to correlate with the return of breast and other forms of cancer[4] TK-1 can be used to detect cancer earlier, determine what stage it is in, and detect recurrence. Thymidine Kinase 1 can be measured based on its enzyme activity[5] or using immunoassay.[6]

References

References

  1. ↑ “Entrez Gene: Thymidine kinase 1, soluble”.
  2. ↑ Huang DY, Chang ZF (June 2001). “Interaction of human thymidine kinase 1 with p21(Waf1)”. Biochem. J. 356 (Pt 3): 829–34. doi:10.1042/0264-6021:3560829. PMCΒ 1221910. PMIDΒ 11389691.
  3. ↑ Alegre MM, Robison RA, O’Neill KL (May 2013). “Thymidine Kinase 1: A Universal Marker for Cancer”. Cancer and Clinical Oncology. 2 (1). doi:10.5539/cco.v2n1p159.
  4. ↑ Alegre MM, Robison RA, O’Neill KL (2012). “Thymidine kinase 1 up-regulation is an early event in breast tumor formation”. Journal of Oncology. 2012: 575647. doi:10.1155/2012/575647. PMCΒ 3388419. PMIDΒ 22778736.
  5. ↑ Munch-Petersen B (2005). “Differences in the kinetic properties of thymidine kinase isoenzymes in unstimulated and phytohemagglutinin-stimulated human lymphocytes”. Mol. Cell. Biochem. 64 (2): 1013–19. PMIDΒ 6504022.
  6. ↑ He Q, Zhang P, Zou L, et al. (2005). “Concentration of thymidine kinase 1 in serum (S-TK1) is a more sensitive proliferation marker in human solid tumors than its activity”. Oncol. Rep. 14 (4): 1013–19. PMIDΒ 25881026.
Further reading

Further reading