BUSCADOR RECOLECTA

Digital.CSIC. Repositorio Institucional del CSIC

oai:digital.csic.es:10261/280800

The dataset is made available under the Open Database License. Any rights in individual contents of the database are licensed under the Database Contents License. Please, read the full ODbL 1.0 license text for the exact terms that apply. Users of the dataset are free to: Share: copy, distribute and use the database, either commercially or non-commercially. Create: produce derivative works from the database. Adapt: modify, transform and build upon the database. Under the following conditions: Attribution: You must attribute any public use of the database, or works produced from the database. For any use or redistribution of the database, or works produced from it, you must make clear to others the license of the original database. Share-Alike: If you publicly use any adapted version of this database, or works produced from an adapted database, you must also offer that adapted database under the ODbL., Abstract: Iron is an indispensable element that participates as an essential cofactor in multiple biological processes. However, when present in excess, iron can engage in redox reactions that generaten reactive oxygen species that damage cells at multiple levels. In this report, we have characterized the response of budding yeast species from the Saccharomyces genus to elevated environmental iron concentrations. We have observed that S. cerevisiae strains are more resistant to high-iron concentra tions than Saccharomyces non-cerevisiae species. Liquid growth assays showed that species evolu tively closer to S. cerevisiae, such as S. paradoxus, S. jurei, S. mikatae, and S. arboricola were more resistant to high iron levels than the more distant species S. eubayanus and S. uvarum. Remarkably, S. kudriavzevii strains were especially iron sensitive. Growth assays in solid media suggested that S. cerevisiae and S. paradoxus were more resistant to the oxidative stress caused by elevated iron concentrations. When comparing iron accumulation and sensitivity, different patterns were observed. As previously described for S. cerevisiae, S. uvarum and particular strains of S. kudriavzevii and S. paradoxus became more sensitive to iron while accumulating more intracellular iron levels. However, no remarkable changes in intracellular iron accumulation were observed for the rest of the species. Consistent with the activation of iron detoxification systems, an increased expression of the vacuolar iron transporter CCC1 was observed for iron-sensitive strains with high endogenous iron levels. These results indicate that different mechanisms of response to elevated iron concentrations exit in the different species of the genus Saccharomyces., This research was supported by grants BIO2017-87828-C2-1-P, PID2020-116940RB-I00, and RED2018-102467-T funded by MCIN/AEI/10.13039/501100011033 and, in the case of BIO2017-87828-C2-1-P, by ERDF A way of making Europe, to S.P. Some computations were performed on Tirant III of the Spanish Supercomputing Network (‘‘Servei d’Informàtica de la Universitat de València”) under the project BCV-2021-1-0001 granted to D.P., while others were performed on resources provided by UNINETT Sigma2 - the National Infrastructure for High Performance Computing and Data Storage in Norway, project NN8029K. This work has also been supported by a predoctoral fellowship ACIF/2018/077 to R.S-D. and a predoctoral fellowship ACIF/2019/214 to T.J., both funded by “Generalitat Valenciana” and European Social Fund (ESF). D.P. is a researcher funded by the Research Council of Norway (RCN) grant Nos. RCN 324253 and Distinguished Researcher funded by the “Generalitat Valenciana” plan GenT grant No. CIDEGENT/2021/039, Peer reviewed