: Extracellular DNA (exDNA) can be actively released by living cells and different putative functions have been attributed to it. Further, homologous exDNA has been reported to exert species-specific inhibitory effects on several organisms. Here, we demonstrate by different experimental evidence, including 1H-NMR metabolomic fingerprint, that the growth rate decline in Saccharomyces cerevisiae fed-batch cultures is determined by the accumulation of exDNA in the medium. Sequencing of such secreted exDNA represents a portion of the entire genome, showing a great similarity with extrachromosomal circular DNA (eccDNA) already reported inside yeast cells. The recovered DNA molecules were mostly single strands and specifically associated to the yeast metabolism displayed during cell growth. Flow cytometric analysis showed that the observed growth inhibition by exDNA corresponded to an arrest in the S phase of the cell cycle. These unprecedented findings open a new scenario on the functional role of exDNA produced by living cells.
Extracellular DNA secreted in yeast cultures is metabolism-specific and inhibits cell proliferation / de Alteriis, Elisabetta; Incerti, Guido; Cartenì, Fabrizio; Chiusano, Maria Luisa; Colantuono, Chiara; Palomba, Emanuela; Termolino, Pasquale; Monticolo, Francesco; Esposito, Alfonso; Bonanomi, Giuliano; Capparelli, Rosanna; Iannaccone, Marco; Foscari, Alessandro; Landi, Carmine; Parascandola, Palma; Sanchez, Massimo; Tirelli, Valentina; de Falco, Bruna; Lanzotti, Virginia; Mazzoleni, Stefano. - In: MICROBIAL CELL. - ISSN 2311-2638. - 10:12(2023), pp. 292-295. [10.15698/mic2023.12.810]
Extracellular DNA secreted in yeast cultures is metabolism-specific and inhibits cell proliferation
de Alteriis, ElisabettaPrimo
;Cartenì, Fabrizio;Chiusano, Maria Luisa;Colantuono, Chiara;Palomba, Emanuela;Termolino, Pasquale;Monticolo, Francesco;Bonanomi, Giuliano;Capparelli, Rosanna;Iannaccone, Marco;de Falco, Bruna;Lanzotti, Virginia;Mazzoleni, Stefano
2023
Abstract
: Extracellular DNA (exDNA) can be actively released by living cells and different putative functions have been attributed to it. Further, homologous exDNA has been reported to exert species-specific inhibitory effects on several organisms. Here, we demonstrate by different experimental evidence, including 1H-NMR metabolomic fingerprint, that the growth rate decline in Saccharomyces cerevisiae fed-batch cultures is determined by the accumulation of exDNA in the medium. Sequencing of such secreted exDNA represents a portion of the entire genome, showing a great similarity with extrachromosomal circular DNA (eccDNA) already reported inside yeast cells. The recovered DNA molecules were mostly single strands and specifically associated to the yeast metabolism displayed during cell growth. Flow cytometric analysis showed that the observed growth inhibition by exDNA corresponded to an arrest in the S phase of the cell cycle. These unprecedented findings open a new scenario on the functional role of exDNA produced by living cells.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.