background:
Thymidylate synthase (TS) is an intracellular enzyme critical for de novo synthesis of DNA. In cancer, expression of TS is often elevated and becomes further elevated as a result of treatment with the most commonly used chemotherapeutic, 5-fluorouracil (5-FU). Resistance or lack of response to 5-FU is attributed to the elevation of TS activity. Overexpression of TS has been demonstrated in many types of tumors including breast, colon, gastric and melanoma and is usually predictive of shortened survival time.
Function:
Contributes to the de novo mitochondrial thymidylate biosynthesis pathway.
Subunit:
Homodimer.
Subcellular Location:
Nucleus. Cytoplasm. Mitochondrion. Mitochondrion matrix. Mitochondrion inner membrane.
Similarity:
Belongs to the thymidylate synthase family.
Database links:
UniProtKB/Swiss-Prot: P04818.3
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
胸苷酸合成酶(thymidylate synthase,TS)是生物体内催化胸苷酸合成所必需的酶,多年来一直作为肿瘤化疗的重要靶酶。对TS基因调控机制的研究表明:基因扩增、转录、翻译和翻译后过程都参与了TS表达的调控。TS可与自身的mRNA结合形成TS-mRNA复合物,使mRNA翻译受阻,5-氟尿嘧啶(5-fluorouracil,5-FU)等抗代谢药物可与TS蛋白结合,结合后的复合物不能与TS mRNA作用,导致体内TS的表达升高,是肿瘤细胞产生抗药性的重要分子机制之一。
|
|
