Overexpressed transglutaminase 5 triggers cell death

B. Cadot, A. Rufini, V. Pietroni, S. Ramadan, P. Guerrieri, G. Melino, E. Candi

Research output: Contribution to journalArticlepeer-review

Abstract

Transglutaminases are a class of nine different proteins involved in many biological phenomena such as differentiation, tissue repair, endocytosis. Transglutaminase 5 was originally cloned from skin keratinocytes, and a partial biochemical characterization showed its involvment in skin differentiation. Here we demonstrate that transglutaminase 5 is able to induce cell death when intracellularly overexpressed. Transfected cells show enzymatic activity, as demonstrated by fluoresceincadaverine staining. Transfected cells died due to the formation of hypodiploid DNA content, indicating the induction of cell death under these pharmacological conditions. We also show that the primary sequence of transglutaminase 5 contains GTP binding domains which are similar to those in transglutaminase 2. This raises the possibility that transglutaminase 5 is regulated by GTP in a similar fashion to transglutaminase 2.

Original languageEnglish
Pages (from-to)405-408
Number of pages4
JournalAmino Acids
Volume26
Issue number4
Publication statusPublished - Jul 2004

Keywords

  • Cell death
  • Cross-links
  • Skin
  • Transglutaminase

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Biochemistry
  • Endocrinology

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