Open AccessPurification, identification and preliminary crystallographic studies of Pru du amandin, an allergenic protein from Prunus dulcis
Author(s) -
Gaur Vineet,
Sethi Dhruv K.,
Salunke Dinakar M.
Publication year - 2008
Publication title -
acta crystallographica section f
Language(s) - English
Resource type - Journals
ISSN - 1744-3091
DOI - 10.1107/s1744309107064615
Subject(s) - storage protein , chemistry , allergen , prunus dulcis , food allergy , fractionation , ammonium sulfate , chromatography , botany , allergy , biology , biochemistry , gene , cultivar , immunology
Food allergies appear to be one of the foremost causes of hypersensitivity reactions. Nut allergies account for most food allergies and are often permanent. The 360 kDa hexameric protein Pru du amandin, a known allergen, was purified from almonds ( Prunus dulcis ) by ammonium sulfate fractionation and ion‐exchange chromatography. The protein was identified by a BLAST homology search against the nonredundant sequence database. Pru du amandin belongs to the 11S legumin family of seed storage proteins characterized by the presence of a cupin motif. Crystals were obtained by the hanging‐drop vapour‐diffusion method. The crystals belong to space group P 4 1 (or P 4 3 ), with unit‐cell parameters a = b = 150.7, c = 164.9 Å.