The tomato subtilase family includes several cell death-related proteinases with caspase specificity
Reichardt, Sven (University of Hohenheim. Institute of Plant Physiology and Biotechnology)
Repper, Dagmar (University of Hohenheim. Institute of Plant Physiology and Biotechnology)
Tuzhikov, Alexander I. (Moscow State University. Belozersky Institute of Physico-Chemical Biology)
Galiullina, Raisa A. (Moscow State University. Belozersky Institute of Physico-Chemical Biology)
Planas-Marquès, Marc (Centre de Recerca en Agrigenòmica)
Chichkova, Nina V. (Moscow State University. Belozersky Institute of Physico-Chemical Biology)
Vartapetian, Andrey B. (Moscow State University. Belozersky Institute of Physico-Chemical Biology)
Stintzi, Annick (University of Hohenheim. Institute of Plant Physiology and Biotechnology)
Schaller, Andres (University of Hohenheim. Institute of Plant Physiology and Biotechnology)

Date:	2018
Abstract:	Phytaspases are Asp-specific subtilisin-like plant proteases that have been likened to animal caspases with respect to their regulatory function in programmed cell death (PCD). We identified twelve putative phytaspase genes in tomato that differed widely in expression level and tissue-specific expression patterns. Most phytaspase genes are tandemly arranged on tomato chromosomes one, four, and eight, and many belong to taxon-specific clades, e. g. the P69 clade in the nightshade family, suggesting that these genes evolved by gene duplication after speciation. Five tomato phytaspases (SlPhyts) were expressed in N. benthamiana and purified to homogeneity. Substrate specificity was analyzed in a proteomics assay and with a panel of fluorogenic peptide substrates. Similar to animal caspases, SlPhyts recognized an extended sequence motif including Asp at the cleavage site. Clear differences in cleavage site preference were observed implying different substrates in vivo and, consequently, different physiological functions. A caspase-like function in PCD was confirmed for five of the seven tested phytaspases. Cell death was triggered by ectopic expression of SlPhyts 2, 3, 4, 5, 6 in tomato leaves by agro-infiltration, as well as in stably transformed transgenic tomato plants. SlPhyts 3, 4, and 5 were found to contribute to cell death under oxidative stress conditions.
Note:	Aquest article té una correcció a 10.1038/s41598-020-62487-w
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Scientific reports, Vol. 8 (July 2018) , art. 10531, ISSN 2045-2322

Correcció de l'article: https://ddd.uab.cat/record/252516
DOI: 10.1038/s41598-018-28769-0
PMID: 30002392

14 p, 1.3 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
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