PMID- 15080835 OWN - NLM STAT- MEDLINE DCOM- 20040809 LR - 20051117 IS - 0105-4538 (Print) IS - 0105-4538 (Linking) VI - 59 IP - 5 DP - 2004 May TI - Molecular characterization of a 10-kDa buckwheat molecule reactive to allergic patients' IgE. PG - 533-8 AB - BACKGROUND: Using the sera from buckwheat (BW)-allergic patients, several putative causative molecules were reported. However, few molecules were determined on the molecular structure. We demonstrated in 2000 that the major allergen with 24 kDa (BW24KD) is a legumin-like storage protein. OBJECTIVE: The aim of this study was to isolate and characterize further a major allergen with 10 kDa by molecular cloning. METHODS AND RESULTS: Buckwheat allergens were identified by immunoblotting analysis using sera from 14 allergic and two nonallergic individuals. We identified a protein with 10 kDa (BW10KD) that reacted with immunoglobulin E (IgE) more strongly than with IgG and IgA in 57% of the allergic patients but not with IgE in nonallergic individuals. Analyses were performed by N-terminal amino acid sequencing and molecular cloning. Physiological significance was assessed by an immunoblotting experiment showing that the reactivity of an allergic patient's serum IgE to BW10KD was competitively inhibited by natural BW extracts. CONCLUSION: Molecular cloning experiments indicated that BW10KD as a BW allergen was a member of the 2S-albumin multigene family. FAU - Matsumoto, R AU - Matsumoto R AD - Department of Bioengineering, Faculty of Engineering, Kagoshima University, Kagoshima, Japan. FAU - Fujino, K AU - Fujino K FAU - Nagata, Y AU - Nagata Y FAU - Hashiguchi, S AU - Hashiguchi S FAU - Ito, Y AU - Ito Y FAU - Aihara, Y AU - Aihara Y FAU - Takahashi, Y AU - Takahashi Y FAU - Maeda, K AU - Maeda K FAU - Sugimura, K AU - Sugimura K LA - eng SI - GENBANK/AB055892 PT - Journal Article PL - Denmark TA - Allergy JT - Allergy JID - 7804028 RN - 0 (Allergens) RN - 0 (Plant Extracts) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Allergens/chemistry/*genetics/*immunology/isolation & purification MH - Amino Acid Sequence MH - Child MH - Child, Preschool MH - Fagopyrum/chemistry/*immunology MH - Female MH - Humans MH - Hypersensitivity/*immunology MH - Immunoblotting MH - Immunoglobulin E/*immunology MH - Male MH - Middle Aged MH - Molecular Sequence Data MH - Molecular Weight MH - Plant Extracts/chemistry EDAT- 2004/04/15 05:00 MHDA- 2004/08/10 05:00 CRDT- 2004/04/15 05:00 PHST- 2004/04/15 05:00 [pubmed] PHST- 2004/08/10 05:00 [medline] PHST- 2004/04/15 05:00 [entrez] AID - ALL412 [pii] AID - 10.1046/j.1398-9995.2003.00412.x [doi] PST - ppublish SO - Allergy. 2004 May;59(5):533-8. doi: 10.1046/j.1398-9995.2003.00412.x.