The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis

Eisenhut M, Hoecker N, Schmidt SB, Basgaran RM, Flachbart S, Jahns P, Eser T, Geimer S, Husted S, Weber APM, Leister D, et al. (2018)
Molecular Plant 11(7): 955-969.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Eisenhut, MarionUniBi ; Hoecker, Natalie; Schmidt, Sidsel Birkelund; Basgaran, Rubek Merina; Flachbart, Samantha; Jahns, Peter; Eser, Tabea; Geimer, Stefan; Husted, Søren; Weber, Andreas P.M.; Leister, Dario; Schneider, Anja
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Abstract / Bemerkung
The transition metal manganese (Mn) is indispensable for photoautotrophic growth since photosystem II (PSII) employs an inorganic Mn4CaO5 cluster for water splitting. Here, we show that the Arabidopsis membrane protein CHLOROPLAST MANGANESE TRANSPORTER1 (CMT1) is involved in chloroplast Mn homeostasis. CMT1 is the closest homolog of the previously characterized thylakoid Mn transporter PHOTOSYNTHESIS-AFFECTED MUTANT71 (PAM71). In contrast to PAM71, CMT1 resides at the chloroplast envelope and is ubiquitously expressed. Nonetheless, like PAM71, the expression of CMT1 can also alleviate the Mn-sensitive phenotype of yeast mutant Δpmr1. The cmt1 mutant is severely suppressed in growth, chloroplast ultrastructure, and PSII activity owing to a decrease in the amounts of pigments and thylakoid membrane proteins. The importance of CMT1 for chloroplast Mn homeostasis is demonstrated by the significant reduction in chloroplast Mn concentrations in cmt1-1, which exhibited reduced Mn binding in PSII complexes. Moreover, CMT1 expression is downregulated in Mn-surplus conditions. The pam71 cmt1-1double mutant resembles the cmt1-1 single mutant rather than pam71 in most respects. Taken together, our results suggest that CMT1 mediates Mn2+ uptake into the chloroplast stroma, and that CMT1 and PAM71 function sequentially in Mn delivery to PSII across the chloroplast envelope and the thylakoid membrane.
Erscheinungsjahr
2018
Zeitschriftentitel
Molecular Plant
Band
11
Ausgabe
7
Seite(n)
955-969
ISSN
1674-2052
Page URI
https://pub.uni-bielefeld.de/record/2968440

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Eisenhut M, Hoecker N, Schmidt SB, et al. The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis. Molecular Plant. 2018;11(7):955-969.
Eisenhut, M., Hoecker, N., Schmidt, S. B., Basgaran, R. M., Flachbart, S., Jahns, P., Eser, T., et al. (2018). The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis. Molecular Plant, 11(7), 955-969. https://doi.org/10.1016/j.molp.2018.04.008
Eisenhut, Marion, Hoecker, Natalie, Schmidt, Sidsel Birkelund, Basgaran, Rubek Merina, Flachbart, Samantha, Jahns, Peter, Eser, Tabea, et al. 2018. “The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis”. Molecular Plant 11 (7): 955-969.
Eisenhut, M., Hoecker, N., Schmidt, S. B., Basgaran, R. M., Flachbart, S., Jahns, P., Eser, T., Geimer, S., Husted, S., Weber, A. P. M., et al. (2018). The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis. Molecular Plant 11, 955-969.
Eisenhut, M., et al., 2018. The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis. Molecular Plant, 11(7), p 955-969.
M. Eisenhut, et al., “The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis”, Molecular Plant, vol. 11, 2018, pp. 955-969.
Eisenhut, M., Hoecker, N., Schmidt, S.B., Basgaran, R.M., Flachbart, S., Jahns, P., Eser, T., Geimer, S., Husted, S., Weber, A.P.M., Leister, D., Schneider, A.: The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis. Molecular Plant. 11, 955-969 (2018).
Eisenhut, Marion, Hoecker, Natalie, Schmidt, Sidsel Birkelund, Basgaran, Rubek Merina, Flachbart, Samantha, Jahns, Peter, Eser, Tabea, Geimer, Stefan, Husted, Søren, Weber, Andreas P.M., Leister, Dario, and Schneider, Anja. “The Plastid Envelope CHLOROPLAST MANGANESE TRANSPORTER1 Is Essential for Manganese Homeostasis in Arabidopsis”. Molecular Plant 11.7 (2018): 955-969.
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