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Title: Genetic polymorphisms of major house dust mite allergens
Authors: S. Piboonpocanun
N. Malainual
O. Jirapongsananuruk
P. Vichyanond
W. R. Thomas
Mahidol University
University of Western Australia
Institute of Molecular Biology and Genetics
Keywords: Immunology and Microbiology
Issue Date: 1-Apr-2006
Citation: Clinical and Experimental Allergy. Vol.36, No.4 (2006), 510-516
Abstract: Background: Polymorphic sequence substitutions in the major mite allergens can markedly affect immunoglobulin E binding and T cell responses, but there are few studies on environmental isolates from Dermatophagoides pteronyssinus and none for D. farinae. Objective: To determine the sequence variation of the group 1 and 2 allergens from environmental D. pteronyssinus and D. farinae. Methods: RNA from each species was isolated from homes in Bangkok and the sequence of Der p 1, Der p 2, Der f 1, and Der f 2 determined from cDNA produced by high fidelity polymerase chain reactions. Results: The enlarged data set revealed preferred amino acid substitutions in residues 19, 81, and 215 of Der p 1 as well as sporadic changes. Der p 2 showed frequent variations with clusters of amino acid substitutions, but the canonical Der p 2.0101 was not found in any of 17 sequences. Der f 2 showed variants with clusters of substitutions similar to Der p 2 but in different amino acid positions and without any structural concordance. Der f 1 in contrast to the other allergens had few amino acid sequence substitutions. Conclusions: The sequence information on variants provides data important for the optimal design of allergen formulations and useful for the genetic engineering and structure-function analyses of the major allergens. © 2006 Blackwell Publishing Ltd.
ISSN: 13652222
Appears in Collections:Scopus 2006-2010

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