Molecular discrimination of Bx7 alleles demonstrates that a highly expressed high-molecular-weight glutenin allele has a major impact on wheat flour dough strength

2003 ◽  
Vol 107 (8) ◽  
pp. 1524-1532 ◽  
Author(s):  
B. J. Butow ◽  
W. Ma ◽  
K. R. Gale ◽  
G. B. Cornish ◽  
L. Rampling ◽  
...  
2018 ◽  
Vol 69 (9) ◽  
pp. 873
Author(s):  
Xin Ma ◽  
Xuye Du ◽  
Cunyao Bo ◽  
Hongwei Wang ◽  
Anfei Li ◽  
...  

High-molecular-weight glutenin subunits (HMW-GS) in bread wheat are major determinants of dough viscoelastic properties and the end-use quality of wheat flour. Cysteine residues, which form intermolecular disulphide bonds in HMW-GS, could improve the strength of gluten. To our knowledge, the number and position of cysteine residues in HMW-GS are conserved between wheat (Triticum aestivum) and Aegilops markgrafii. In the present study, we modified a gene (1Cx1.1) from Ae. markgrafii for an HMW-GS that possessed the typical structure and conserved number of cysteines. Site-directed mutagenesis was carried out in 1Cx1.1 to investigate how the position of cysteine residues in HMW-GS affects the mixing properties of dough. Six HMW-GS containing an extra cysteine residue were expressed in Escherichia coli, and the proteins were purified at sufficient scale for incorporation into flour to test dough quality. There were large differences in dough property among samples containing different modified subunits. Cysteine substituting in the N-terminal or repetitive-domain of HMW-GS could significantly improve dough quality. The results showed that the strategy was useful for providing genetic resources for gene engineering, and hence could be valuable for improving the processing quality of wheat.


2012 ◽  
Vol 56 (3) ◽  
pp. 676-683 ◽  
Author(s):  
A. Turbin-Orger ◽  
E. Boller ◽  
L. Chaunier ◽  
H. Chiron ◽  
G. Della Valle ◽  
...  

2021 ◽  
pp. 130543
Author(s):  
Xiaolong Wang ◽  
Pai Peng ◽  
Rudi Appels ◽  
Linpei Tian ◽  
Xiaoyang Zou

2018 ◽  
Vol 43 (6) ◽  
pp. e13857 ◽  
Author(s):  
Georgiana Gabriela Codină ◽  
Adriana Dabija ◽  
Silviu Gabriel Stroe ◽  
Sorina Ropciuc

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