Electrophoretic and immunological analyses of almond (Prunus dulcis L.) genotypes and hybrids

Shridhar K. Sathe, Suzanne S Teuber, Thomas M. Gradziel, Kenneth H. Roux

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Aqueous extracts from sixty almond samples representing various genotypes and interspecies hybrids of almond, including almond-peach, were analyzed for protein and peptide content using electrophoresis, Western immunoblotting, and enzyme-linked immunosorbent assay (ELISA). Nondenaturing nondissociating polyacrylamide gel electrophoresis (NDND-PAGE) of the aqueous extracts indicated that a single major storage protein (almond major protein - AMP or amandin) dominated the total soluble protein composition. Denaturing SDS-PAGE analyses of the aqueous extracts revealed that the AMP was mainly composed of two sets of polypeptides with estimated molecular masses in the ranges of 38-41 kDa and 20-22 kDa, regardless of the source; however, distinct variations in the intensity and electrophoretic mobility of some bands were noted between samples. In addition to AMP, several minor polypeptides were also present in all the genotypes, and variations were seen in these as well. Regardless of the genotype, AMP was recognized in Western blots by rabbit polyclonal anti-AMP antibodies, mouse monoclonal anti-AMP antibodies (mAbs), and serum IgE from patients displaying strong serum anti-almond IgE reactivity. As with protein staining results, antibody reactivity also revealed common patterns but displayed some variation between samples. An anti-AMP inhibition ELISA was used to quantify and compare aqueous extracts for various samples. All samples (n = 60) reacted in this assay with a mean ± standard deviation (σn) = 0.82 ± 0.18 when compared to reference aqueous extract from Nonpareil designated as 1.0.

Original languageEnglish (US)
Pages (from-to)2043-2052
Number of pages10
JournalJournal of Agricultural and Food Chemistry
Volume49
Issue number4
DOIs
StatePublished - 2001

Fingerprint

Prunus dulcis
Adenosine Monophosphate
almonds
Genotype
genotype
extracts
water
Assays
antibodies
Immunosorbents
polyacrylamide gel electrophoresis
polypeptides
sampling
Proteins
Electrophoresis
enzyme-linked immunosorbent assay
Immunoglobulin E
Peptides
Antibodies
Polyacrylamide Gel Electrophoresis

Keywords

  • Allergy
  • Almond
  • Amandin
  • AMP
  • Electrophoresis
  • ELISA
  • Western immunoblotting

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Food Science
  • Chemistry (miscellaneous)

Cite this

Electrophoretic and immunological analyses of almond (Prunus dulcis L.) genotypes and hybrids. / Sathe, Shridhar K.; Teuber, Suzanne S; Gradziel, Thomas M.; Roux, Kenneth H.

In: Journal of Agricultural and Food Chemistry, Vol. 49, No. 4, 2001, p. 2043-2052.

Research output: Contribution to journalArticle

Sathe, Shridhar K. ; Teuber, Suzanne S ; Gradziel, Thomas M. ; Roux, Kenneth H. / Electrophoretic and immunological analyses of almond (Prunus dulcis L.) genotypes and hybrids. In: Journal of Agricultural and Food Chemistry. 2001 ; Vol. 49, No. 4. pp. 2043-2052.
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