Abstract
Protein tyrosine phosphorylation is a crucial cellular event that is involved in the most important processes of cellular metabolism. Low-molecular-weight protein tyrosine phosphatase (LMW-PTP) is a tyrosine phosphatase that presents two active distinct isoforms and is regulated through cysteine oxidation and tyrosine phosphorylation. This enzyme has been linked to tumorigenesis, but its role is considered controversial: it may be considered oncogenic or anti-oncogenic depending on its interaction with different substrates. Furthermore, recent studies have demonstrated that LMW-PTP is involved in epithelial cell migration, a characteristic of tumor cells. This fact strengthens the importance of this enzyme in the oncogenic process and opens new avenues for future research. The study of LMW-PTP and its pathways may enhance therapeutic strategies that target tyrosine phosphorylation and its substrates. In this review, we try to clarify the importance of this protein in carcinogenesis through the analysis of LMW-PTP interaction with different substrates.
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