Proteomic and genetic analysis of glycinin subunits of sixteen soybean genotypes

Abstract

Garrett, Wesley M.; and Luthria, Devanand, "Proteomic and genetic analysis of glycinin subunits of sixteen soybean genotypes" (2007 AbstractWe investigated proteomic and genomic profiles of glycinin, a family of major storage proteins in 16 different soybean genotypes consisting of four groups including wild soybean (Glycine soja), unimproved cultivated soybean landraces from Asia (G. max), ancestors of N. American soybean (G. max), and modern soybean (G. max) genotypes. We observed considerable variation in all five glycinin subunits, G1, G2 G3, G4 and G5 using proteomics and genetic analysis. Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and mass spectrometry (MS) analysis showed that the wild genotypes had a range of 25e29 glycinin protein spots that included both acidic and basic polypeptides followed by the ancestors with 24e28, modern cultivars with 24e25, and landraces with 17e23 protein spots. Overall, the wild genotypes have a higher number of protein spots when compared to the other three genotypes. Major variation was observed in acidic polypeptides of G3, G4 and G5 compared to G1 and G2, and minor variation was observed in basic polypeptides of all subunits. Our data indicated that there are major variations of glycinin subunits between wild and cultivated genotypes rather than within the same groups. Based on Southern blot DNA analysis, we observed genetic polymorphisms in group I genes (G1, G2, and G3) between and within the four genotype groups, but not in group II genes (G4 and G5). This is the first study reporting the comparative analysis of glycinin in a diverse set of soybean genotypes using combined proteomic and genetic analysis.

Determination of Optimal Protein Quantity Required to Identify Abundant and Less Abundant Soybean Seed Proteins by 2D-PAGE and MS

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Priming, signaling, and protein production associated with induced resistance by Bacillus amyloliquefaciens KPS46

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Purification and biochemical characterization of 11S globulin from chan (Hyptis suaveolens L. Poit) seeds

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