Ferritins and iron storage in plants

Briat, Jean‐François; Duc, Céline; Ravet, Karl; Gaymard, Frédéric

doi:10.1016/j.bbagen.2009.12.003

Cited by 308 publications

(259 citation statements)

References 63 publications

Supporting

Mentioning

249

Contrasting

Unclassified

Order By: Relevance

“…In addition, the large accumulation of iron in a small area could explain the observed induction of ferritin in zones II and III, 10b,24 since this protein is involved in iron accumulation and in detoxification of free-radicals produced in Fenton reactions. 25 Some iron hotspots were also observed in non-nuclear regions of cells in early zone III (Fig. S2, ESI †).…”

Section: Resultsmentioning

confidence: 97%

Iron distribution through the developmental stages of Medicago truncatula nodules

et al. 2013

View full text Add to dashboard Cite

Paramount to symbiotic nitrogen fixation (SNF) is the synthesis of a number of metalloenzymes that use iron as a critical component of their catalytical core. Since this process is carried out by endosymbiotic rhizobia living in legume root nodules, the mechanisms involved in iron delivery to the rhizobia-containing cells are critical for SNF. In order to gain insight into iron transport to the nodule, we have used synchrotron-based X-ray fluorescence to determine the spatio-temporal distribution of this metal in nodules of the legume Medicago truncatula with hitherto unattained sensitivity and resolution. The data support a model in which iron is released from the vasculature into the apoplast of the infection/differentiation zone of the nodule (zone II). The infected cell subsequently takes up this apoplastic iron and delivers it to the symbiosome and the secretory system to synthesize ferroproteins.Upon senescence, iron is relocated to the vasculature to be reused by the shoot. These observations highlight the important role of yet to be discovered metal transporters in iron compartmentalization in the nodule and in the recovery of an essential and scarce nutrient for flowering and seed production.

show abstract

Section: Resultsmentioning

confidence: 97%

Iron distribution through the developmental stages of Medicago truncatula nodules

et al. 2013

View full text Add to dashboard Cite

show abstract

“…In legume plants, a major part of iron is stored in ferritin, a ubiquitous multimeric iron storage protein. [2][3][4][5] Ferritin, which forms spherical hollow protein shell composed of 24 subunits, can deposit thousands of iron atoms as non-toxic and bioavailable form in its inner cavity.…”

mentioning

confidence: 99%

The iron content and ferritin contribution in fresh, dried, and toasted nori, Pyropia yezoensis

Masuda

Yamamoto

Toyohara

2015

Bioscience, Biotechnology, and Biochemistry

View full text Add to dashboard Cite

Iron is one of the essential trace elements for humans. In this study, the iron contents in fresh, dried, and toasted nori (Pyropia yezoensis) were analyzed. The mean iron content of fresh, dried, and toasted nori were 19.0, 22.6, and 26.2 mg/100 g (dry weight), respectively. These values were superior to other food of plant origin. Furthermore, most of the iron in nori was maintained during processing, such as washing, drying, and toasting. Then, the form of iron in fresh, dried, and toasted nori was analyzed. As a result, an iron storage protein ferritin contributed to iron storage in raw and dried nori, although the precise rate of its contribution is yet to be determined, while ferritin protein cage was degraded in the toasted nori. It is the first report that verified the ferritin contribution to iron storage in such edible macroalgae with commercial importance.

show abstract

“…Some apoferritins also contain additional catalytically active subunits called M [48]. Plant apoferritin subunits are considered to be H/L hybrids, since they contain both a ferroxidase centre and a nucleation centre [50].…”

Section: Apoferritin Structurementioning

confidence: 99%