Novel x-type high-molecular-weight glutenin genes from Aegilops tauschii and their implications on the wheat origin and evolution mechanism of Glu-D1-1 proteins.

Genetics
Yanzhen ZhangYueming Yan

Abstract

Two new x-type high-molecular-weight glutenin subunits with similar size to 1Dx5, designated 1Dx5*t and 1Dx5.1*t in Aegilops tauschii, were identified by SDS-PAGE, RP-HPLC, and MALDI-TOF-MS. The coding sequences were isolated by AS-PCR and the complete ORFs were obtained. Allele 1Dx5*t consists of 2481 bp encoding a mature protein of 827 residues with deduced Mr of 85,782 Da whereas 1Dx5.1*t comprises 2526 bp encoding 842 residues with Mr of 87,663 Da. The deduced Mr's of both genes were consistent with those determined by MALDI-TOF-MS. Molecular structure analysis showed that the repeat motifs of 1Dx5*t were correspondingly closer to the consensus compared to 1Dx5.1*t and 1Dx5 subunits. A total of 11 SNPs (3 in 1Dx5*t and 8 in 1Dx5.1*t) and two indels in 1Dx5*t were identified, among which 8 SNPs were due to C-T or A-G transitions (an average of 73%). Expression of the cloned ORFs and N-terminal sequencing confirmed the authenticities of the two genes. Interestingly, several hybrid clones of 1Dx5*t expressed a slightly smaller protein relative to the authentic subunit present in seed proteins; this was confirmed to result from a deletion of 180 bp through illegitimate recombination as well as an in-frame stop codon. Network an...Continue Reading

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Citations

May 22, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·X H LiY M Yan
Jun 18, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhenze XieYueming Yan
Feb 9, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ke WangWujun Ma
Jun 28, 2013·Journal of Agricultural and Food Chemistry·Mária OszvaldLászló Tamás
Dec 7, 2013·Journal of Applied Genetics·Saminathan SubburajYueming Yan
May 31, 2019·GM Crops & Food·Kirushanthy KajendranWijerupage Sandhya Sulochana Wijesundera
Jul 16, 2015·Journal of Genetics·Xuye DuLingrang Kong

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