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Title: Brachypodium distachyon grain: identification and subcellular localization of storage proteins

Journal Article · · Journal of Experimental Botany
DOI: https://doi.org/10.1093/jxb/erq050 · OSTI ID:1625362
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. UR1268 Biopolymeres Interactions Assemblages, INRA, Nantes (France); DOE/OSTI
  2. UR1268 Biopolymeres Interactions Assemblages, INRA, Nantes (France)

Seed storage proteins are of great importance in nutrition and in industrial transformation because of their functional properties. Brachypodium distachyon has been proposed as a new model plant to study temperate cereals. The protein composition of Brachypodium grain was investigated by separating the proteins on the basis of their solubility combined with a proteomic approach. Salt-soluble proteins as well as salt-insoluble proteins separated by two-dimensional gel electrophoresis revealed 284 and 120 spots, respectively. Proteins from the major spots were sequenced by mass spectrometry and identified by searching against a Brachypodium putative protein database. Our analysis detected globulins and prolamins but no albumins. Globulins were represented mainly by the 11S type and their solubility properties corresponded to the glutelin found in rice. An in silico search for storage proteins returned more translated genes than expressed products identified by mass spectrometry, particularly in the case of prolamin type proteins, reflecting a strong expression of globulins at the expense of prolamins. Microscopic examination of endosperm cells revealed scarce small-size starch granules surrounded by protein bodies containing 11S globulins. The presence of protein bodies containing glutelins makes B. distachyon closer to rice or oat than to wheat endosperm.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1625362
Journal Information:
Journal of Experimental Botany, Journal Name: Journal of Experimental Botany Journal Issue: 6 Vol. 61; ISSN 0022-0957
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Endosperm development in Brachypodium distachyon journal November 2010
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A comprehensive overview of grain development in Brachypodium distachyon variety Bd21 journal October 2011
Endomembrane proteomics reveals putative enzymes involved in cell wall metabolism in wheat grain outer layers journal March 2015
Gene duplication and an accelerated evolutionary rate in 11S globulin genes are associated with higher protein synthesis in dicots as compared to monocots journal January 2012
Seed storage proteins of the globulin family are cleaved post-translationally in wheat embryos journal July 2012
Molecular Characterization and Expression Profiling of the Protein Disulfide Isomerase Gene Family in Brachypodium distachyon L journal April 2014
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A decade of plant proteomics and mass spectrometry: Translation of technical advancements to food security and safety issues: A DECADE OF PLANT PROTEOMICS AND MASS SPECTROMETRY journal January 2013
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Genomic Databases for Crop Improvement book February 2014
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Genomic Databases for Crop Improvement journal March 2012
In Vitro Tissue Culture in Brachypodium: Applications and Challenges journal February 2020