Mass spectrometric analysis reveals O-methylation of pyruvate kinase from pancreatic cancer cells.

Mass spectrometric analysis reveals O-methylation of pyruvate kinase from pancreatic cancer cells.
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质谱分析揭示了胰腺癌细胞中丙酮酸激酶的 O-甲基化。

DOI:
10.1007/s00216-013-6880-7
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发表时间:
2013-05
影响因子:
4.3
通讯作者:
Petricoin EF
Petricoin EF
中科院分区:
化学2区
文献类型:
--
作者:
Zhou W;Capello M;Fredolini C;Racanicchi L;Dugnani E;Piemonti L;Liotta LA;Novelli F;Petricoin EF

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丙酮酸激酶(PK)是一种重要的糖酵解酶,催化磷酸烯醇丙酮酸去磷酸化为丙酮酸。人 PK 同工酶 M2 (PKM2) 是 M1 的剪接变体,在许多癌细胞中过度表达,PKM2 已被研究作为诊断分析的潜在肿瘤标志物和癌症治疗的靶点。为了便于鉴定和表征 PK,我们通过电泳和质谱研究了胰腺癌细胞和正常胰管细胞的酶,并从 PK 中鉴定了多个 O-甲基化残基。这些发现增进了我们对 PK 生化特性的了解,对于理解其在细胞中的生物学功能具有重要意义。
Pyruvate kinase (PK) is an important glycolytic enzyme that catalyzes the dephosphorylation of phospho-enolpyruvate to pyruvate. Human PK isozyme M2 (PKM2), a splice variant of M1, is overexpressed in many cancer cells, and PKM2 has been investigated as a potential tumor marker for diagnostic assays and as a target for cancer therapy. To facilitate identification and characterization of PK, we studied the enzyme from pancreatic cancer cells and normal pancreatic duct cells by electrophoresis and mass spectrometry, and identified multiple O-methylated residues from PK. These findings advance our knowledge of the biochemical properties of PK and will be important in understanding its biological function in cells.
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