AtSIA1 AND AtOSA1 two Abc1 proteins involved in oxidative stress responses and iron distribution within chloroplasts

AtSIA1 AND AtOSA1 : two Abc1 proteins involved in oxidative stress responses and iron distribution within chloroplasts

© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 201(2014), 2 vom: 20. Jan., Seite 452-465
1. Verfasser: Manara, Anna (VerfasserIn)
Weitere Verfasser: DalCorso, Giovanni, Leister, Dario, Jahns, Peter, Baldan, Barbara, Furini, Antonella
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Abc1 protein AtOSA1 AtSIA1 oxidative stress plastoglobules ATP Binding Cassette Transporter 1 Arabidopsis Proteins OSA1 protein, Arabidopsis mehr... SIA1 protein, Arabidopsis Iron E1UOL152H7
Beschreibung
Zusammenfassung:© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.
The Abc1 protein kinases are a large family of functionally diverse proteins with multiple roles in the regulation of respiration and oxidative stress tolerance. A functional characterization was carried out for AtSIA1, an Arabidopsis thaliana Abc1-like protein, focusing on its potential redundancy with its homolog AtOSA1. Both proteins are located within chloroplasts, even if a different subplastidial localization seems probable. The comparison of atsia1 and atosa1 mutants, atsia1/atosa1 double mutant and wild-type plants revealed a reduction in plastidial iron-containing proteins of the Cytb6 f complex in the mutants. Iron uptake from soil is not hampered in mutant lines, suggesting that AtSIA1 and AtOSA1 affect iron distribution within the chloroplast. Mutants accumulated more ferritin and superoxide, and showed reduced tolerance to reactive oxygen species (ROS), potentially indicating a basal role in oxidative stress. The mutants produced higher concentrations of plastochromanol and plastoquinones than wild-type plants, but only atsia1 plants developed larger plastoglobules and contained higher concentrations of α- and γ-tocopherol and VTE1. Taken together, these data suggest that AtSIA1 and AtOSA1 probably act in signaling pathways that influence responses to ROS production and oxidative stress
Beschreibung:Date Completed 15.12.2015
Date Revised 23.04.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.12533