Abstract
The peptidyl–prolyl isomerase Pin1 is prevalently overexpressed in human cancers and is regarded as a new diagnostic and therapeutic target. Pin1 interacts with several proteins involved in cell cycle events in a phosphorylation-dependent manner. Among them, NIMA (never in mitosis, gene A) was first identified to interact with Pin1. In this report, we found that Pin1 could interact with Nek6, one of the human NIMA-related kinases (Neks). This interaction was confirmed by GST pull-down assay, which was further confirmed by immunoprecipitation experiments, as well as immunofluorescence colocalization. We further studied Pin1 and Nek6 mRNA level in 40 pairs of hepatocellular carcinoma cases, finding significant correlations between Nek6 and Pin1 mRNA expression levels in these samples.
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