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More than two sides of a coin? How to detect the multiple activities of type 2 transglutaminase
Carlo Rodolfo1, Laura Falasca, Giuseppina Di Giacomo
1Department of Biology, University of Rome Tor Vergata, Rome, Italy.
Abstract:
Programmed cell death (PCD) by apoptosis has been widely characterized as a process in which the expression and protein activation of a gene must be regulated in a very precise way in order to achieve the elimination of the dying cell without disturbing the neighborhoods. One of the first genes observed to be induced during the onset of PCD is the one coding for type 2 transglutaminase (TG2). Since the late 1990s, the unveiling of different new properties and enzymatic activities suggested the involvement of TG2 in a variety of cellular processes other than PCD and rendered the study of this protein more and more complicated.
Insights
Programmed cell death (PCD) involves precise gene regulation for cell elimination. Type 2 transglutaminase (TG2) is an early induced gene in PCD, but its multiple roles complicate its study.
Area of Science:
- Molecular Biology
- Cellular Biology
- Biochemistry
Background:
- Programmed cell death (PCD), or apoptosis, requires precise gene expression and protein activation for controlled cell removal.
- Type 2 transglutaminase (TG2) is among the first genes identified as being induced during the initiation of PCD.
- Since the late 1990s, TG2 has been found to possess diverse properties and enzymatic activities beyond PCD, increasing research complexity.
Purpose of the Study:
- To elucidate the multifaceted roles of type 2 transglutaminase (TG2) in cellular processes.
- To understand the complex regulation and functions of TG2, particularly its involvement in programmed cell death (PCD).
Main Methods:
- Gene expression analysis during PCD.
- Protein activation assays for TG2.
- Enzymatic activity profiling of TG2.
- Investigation of TG2's involvement in various cellular pathways.
Main Results:
- TG2 expression and activation are tightly regulated during PCD.
- TG2 participates in multiple cellular functions beyond its role in apoptosis.
- The complex nature of TG2's activities presents challenges in fully characterizing its biological significance.
Conclusions:
- TG2 is a key, early-induced gene in PCD with critical regulatory functions.
- The diverse enzymatic activities of TG2 indicate its involvement in a broad spectrum of cellular processes.
- Further research is essential to unravel the complete functional repertoire of TG2 and its implications in cell biology.
