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Letter

Nature Genetics 32, 306–311 (1 October 2002) | doi:10.1038/ng997

Human securin interacts with p53 and modulates p53-mediated transcriptional activity and apoptosis

Juan A. Bernal , Rosa Luna , |[Aacute]|gueda Espina , Ic|[iacute]|ar L|[aacute]|zaro , Francisco Ramos-Morales , Francisco Romero , Carmen Arias , Augusto Silva , Mar|[iacute]|a Tortolero & Jos|[eacute]| A. Pintor-Toro

The gene PTTG1 (encoding the pituitary tumor–transforming 1 protein) is overexpressed in several different tumor types, is tumorigenic in vivo and shows transcriptional activity. The PTTG1 protein is cell-cycle regulated and was identified as the human securin (a category of proteins involved in the regulation of sister-chromatid separation) on the basis of biochemical similarities with the Pds1p protein of budding yeast and the Cut2p protein of fission yeast.