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An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria

Nuclear-encoded RLSB protein binds chloroplastic rbcL mRNA encoding the Rubisco large subunit. RLSB is highly conserved across all groups of land plants and is associated with positive post-transcriptional regulation of rbcL expression. In C(3) leaves, RLSB and Rubisco occur in all chlorenchyma cell...

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Autores principales: Yerramsetty, Pradeep, Agar, Erin M, Yim, Won C, Cushman, John C, Berry, James O
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853808/
https://www.ncbi.nlm.nih.gov/pubmed/28981775
http://dx.doi.org/10.1093/jxb/erx264
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author Yerramsetty, Pradeep
Agar, Erin M
Yim, Won C
Cushman, John C
Berry, James O
author_facet Yerramsetty, Pradeep
Agar, Erin M
Yim, Won C
Cushman, John C
Berry, James O
author_sort Yerramsetty, Pradeep
collection PubMed
description Nuclear-encoded RLSB protein binds chloroplastic rbcL mRNA encoding the Rubisco large subunit. RLSB is highly conserved across all groups of land plants and is associated with positive post-transcriptional regulation of rbcL expression. In C(3) leaves, RLSB and Rubisco occur in all chlorenchyma cell chloroplasts, while in C(4) leaves these accumulate only within bundle sheath (BS) chloroplasts. RLSB’s role in rbcL expression makes modification of its localization a likely prerequisite for the evolutionary restriction of Rubisco to BS cells. Taking advantage of evolutionarily conserved RLSB orthologs in several C(3), C(3)–C(4), C(4)-like, and C(4) photosynthetic types within the genus Flaveria, we show that low level RLSB sequence divergence and modification to BS specificity coincided with ontogeny of Rubisco specificity and Kranz anatomy during C(3) to C(4) evolution. In both C(3) and C(4) species, Rubisco production reflected RLSB production in all cell types, tissues, and conditions examined. Co-localization occurred only in photosynthetic tissues, and both proteins were co-ordinately induced by light at post-transcriptional levels. RLSB is currently the only mRNA-binding protein to be associated with rbcL gene regulation in any plant, with variations in sequence and acquisition of cell type specificity reflecting the progression of C(4) evolution within the genus Flaveria.
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spelling pubmed-58538082018-07-27 An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria Yerramsetty, Pradeep Agar, Erin M Yim, Won C Cushman, John C Berry, James O J Exp Bot Research Papers Nuclear-encoded RLSB protein binds chloroplastic rbcL mRNA encoding the Rubisco large subunit. RLSB is highly conserved across all groups of land plants and is associated with positive post-transcriptional regulation of rbcL expression. In C(3) leaves, RLSB and Rubisco occur in all chlorenchyma cell chloroplasts, while in C(4) leaves these accumulate only within bundle sheath (BS) chloroplasts. RLSB’s role in rbcL expression makes modification of its localization a likely prerequisite for the evolutionary restriction of Rubisco to BS cells. Taking advantage of evolutionarily conserved RLSB orthologs in several C(3), C(3)–C(4), C(4)-like, and C(4) photosynthetic types within the genus Flaveria, we show that low level RLSB sequence divergence and modification to BS specificity coincided with ontogeny of Rubisco specificity and Kranz anatomy during C(3) to C(4) evolution. In both C(3) and C(4) species, Rubisco production reflected RLSB production in all cell types, tissues, and conditions examined. Co-localization occurred only in photosynthetic tissues, and both proteins were co-ordinately induced by light at post-transcriptional levels. RLSB is currently the only mRNA-binding protein to be associated with rbcL gene regulation in any plant, with variations in sequence and acquisition of cell type specificity reflecting the progression of C(4) evolution within the genus Flaveria. Oxford University Press 2017-07-20 2017-08-08 /pmc/articles/PMC5853808/ /pubmed/28981775 http://dx.doi.org/10.1093/jxb/erx264 Text en © The Author 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Yerramsetty, Pradeep
Agar, Erin M
Yim, Won C
Cushman, John C
Berry, James O
An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title_full An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title_fullStr An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title_full_unstemmed An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title_short An rbcL mRNA-binding protein is associated with C(3) to C(4) evolution and light-induced production of Rubisco in Flaveria
title_sort rbcl mrna-binding protein is associated with c(3) to c(4) evolution and light-induced production of rubisco in flaveria
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853808/
https://www.ncbi.nlm.nih.gov/pubmed/28981775
http://dx.doi.org/10.1093/jxb/erx264
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