Evaluation of protein extraction methods for in-depth proteome analysis of narrow-leafed lupin (Lupinus angustifolius) seeds. (15th January 2022)

• Record Type: Journal Article
• Authors: Tahmasian, Arineh; Broadbent, James A.; Juhász, Angéla; Nye-Wood, Mitchell; Le, Thao T.; Bose, Utpal; Colgrave, Michelle L.
• Is Part Of: Food chemistry. Volume 367(2022)
• Publication Date: 2022-01-15
• Subjects: NLL narrow-leafed lupin -- LC-MS/MS liquid chromatography-tandem mass spectrometry -- SWATH sequential window acquisition of all theoretical fragment ions -- DTT dithiothreitol -- HCA hierarchical cluster analysis -- PCA principal component analysis -- GO gene ontology -- GRAVY grand average hydropathicity index -- pI isoelectric point -- IDA information-dependent acquisition -- PBQC pooled biological quality control -- SRL spectral reference library; Lupin -- Legume -- Narrow-leafed lupin -- Protocol optimisation -- Proteomics -- SWATH-MS; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2021.130722
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: Lupin seeds offer potential as a future protein source. Protein extraction of three narrow-leafed lupin varieties was assessed by LC-MS. The extraction solvent influences the depth of lupin seed proteome coverage. Comparative quantitative analysis reveals enrichment of specific protein classes. The proteome of a wild accession differed greatly from domesticated cultivars. Abstract: Lupin is slated as a potential contributor towards future food security. Lupin possesses several nutritional and nutraceutical attributes, many linked to seed proteins. For in-depth characterisation of the lupin proteome, liquid chromatography-tandem mass spectrometry was used to evaluate four protein extraction procedures. The proteomes of three narrow-leafed lupin were qualitatively evaluated using protein/peptide identifications and further quantitatively assessed by data-independent proteome measurement. Each extraction buffer led to unique protein identifications; altogether yielding 2, 760 protein identifications from lupin varieties. The analysis of protein abundance data highlighted distinct differences between Tris-HCl and urea extracted proteomes, while also revealing variation amongst the cultivar proteomes with the wild accession (P27255) distinctly different from the domesticated cultivars (Tanjil, Unicrop). The extraction buffer used influenced the proteome coverage, downstream functional annotation results and consequently the biological interpretation demonstrating the need to optimise and understand the impact of protein extraction conditions.