Immunodominant peptide epitopes of allergen, Asp f 1 from the fungus Aspergillus fumigatus.
Aspergillus fumigatus ribotoxin Asp f 1 is a major allergen with IgE binding activity to serum of a majority of patients with allergic bronchopulmonary aspergillosis (ABPA). The IgE binding epitopes or the T-cell stimulatory peptides of this molecule have not been studied. In the present investigation, we have synthesized linear decapeptides spanning the whole molecule of Asp f 1 and analyzed their IgE binding properties. We have also synthesized peptides based on their possible T-cell stimulatory properties and studied the stimulation of peripheral blood mononuclear cells from ABPA patients and normal controls. Several peptides demonstrated distinct IgE antibody binding response against sera from ABPA patients and proliferative response against peripheral blood mononuclear cells from the patients. From the results, it can be concluded that the carboxy-terminal region of Asp f 1 representing amino acid residues 115-149 involved in both humoral and cell mediated immunoresponses in ABPA.
Kurup
V P
VP
Department of Medicine, The Medical College of Wisconsin, Veterans Affairs Medical Center, Milwaukee, USA. vkurup@post.its.mcw.edu
Banerjee
B
B
Murali
P S
PS
Greenberger
P A
PA
Krishnan
M
M
Hari
V
V
Fink
J N
JN
D000485:Allergens / Q000276:immunology*; D000595:Amino Acid Sequence; D052179:Antigens, Plant; D001232:Aspergillus fumigatus / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D005656:Fungal Proteins / Q000276:immunology*; D006801:Humans; D016056:Immunodominant Epitopes; D007073:Immunoglobulin E / Q000276:immunology; D008213:Lymphocyte Activation; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000276:immunology; D011485:Protein Binding; D012260:Ribonucleases / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology
C081947:ASPF1 protein, Aspergillus fumigatus; D000485:Allergens; D052179:Antigens, Plant; D005656:Fungal Proteins; D016056:Immunodominant Epitopes; D009842:Oligopeptides; C036196:MITF protein, Aspergillus restrictus; D007073:Immunoglobulin E; D012260:Ribonucleases