Cereal Research Communications
Volume/Issue:
Volume 37: Issue 3
Isolation and expression of a new high molecular weight glutenin subunit gene at the Glu-D-1-2 locus from Aegilops tauschii
Authors:
Y. Zhang

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X. An Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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X. Li Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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S. Chen Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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L. Gao Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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K. Wang Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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S. Wang Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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Y. Yan Capital Normal University Key Laboratory of Genetics and Biotechnology, College of Life Science Beijing 100048 China

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Pages:
449–457
Online Publication Date:
08 Sep 2009
Publication Date:
01 Sep 2009
Article Category:
Research Article
DOI:
https://doi.org/10.1556/crc.37.2009.3.14
Keywords:
Aegilops tauschii ; common wheat; HMW-GS; SDS-PAGE; MALDI-TOF-MS; protein post-translational modifications
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Two new y-type HMW-GSs in Ae. tauschii , 1Dy12.1* t and 1Dy12.2 t with the mobility order of 1Dy12.2 t > 1Dy12.1* t > 1Dy12.1 t >1Dy12, were identified by both SDS-PAGE and MALDI-TOF-MS. Molecular cloning and sequencing showed that the genes encoding subunits 1Dy12.1* t and 1Dy12.2 t had identical nucleotide acid sequences with 1,947 bp encoding a mature protein of 627 residues. Their deduced molecular weights were 67,347.6 Da, satisfactorily corresponding to that of 1Dy12.2 t subunit determined by MALDI-TOF-MS (67,015.7 Da), but was significantly smaller than that of the the 1Dy12.1* t subunit (68,577.1 Da). Both subunits showed high similarities to 1Dy10, suggesting that they could have a positive effect on bread-making quality. Interestingly, the expressed protein of the cloned ORF from accessions TD87 and TD130 in E. coli co-migrated with subunit 1Dy12.2 t , but moved slightly faster than 1Dy12.1* t on SDS-PAGE. The expressed protein in transgenic tobacco seeds, however, had the same mobility as the 1Dy12.1* t subunit, as confirmed by both SDS-PAGE and Western blotting. Although direct evidence of phosphoprotein could not be obtained by specific staining method, certain types of post-translational modifications (PTMs) of the 1Dy12.1* t subunit could not be excluded. We believe PTMs might be responsible for the molecular weight difference between the subunits 1Dy12.1* t and 1Dy12.2 t .

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Cereal Research Communications A Quarterly of the Cereal Research Non-Profit Ltd. Company
Print ISSN:
0133-3720
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Cereal Research Communications
Language English
Size A4
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Foundation		 1973
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per Year		 4
Founder Akadémiai Kiadó
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Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
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Springer Nature Switzerland AG
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Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
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ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)

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