A single amino acid substitution on the surface of a natural hevein isoform (Hev b 6.0202), confers different IgE recognition
Por:
Reyes-López C.A., Pedraza-Escalona M., Mendoza G., Hernández-Santoyo A., Rodríguez-Romero A.
Publicada:
1 ene 2006
Resumen:
Decreased immune reactivity of isoforms of major allergens has been reported. However, such claims have always been based on experiments with recombinant proteins. This work describes the molecular and physicochemical characterization of a hevein (Hev b 6.0201) natural isoform (Hev b 6.0202), which is present in rubber latex from Hevea brasiliensis. The isoallergen has a single substitution Asn14Asp, which gives rise to local differences in the surface potential, as observed from the crystal structure presented here. Besides, ELISA inhibition using serum pools of adult and pediatric patients showed reduced IgE-binding capacity (~27%) with the isoallergen. Overall, these results are relevant to delineate crucial residues involved in this dominant discontinuous epitope. © 2006 Federation of European Biochemical Societies.
Filiaciones:
Reyes-López C.A.:
Instituto de Química, Universidad Nacional, Autonoma Mexico, Circuito Exterior, Cd. Univ., Mexico, D.F. 04510, Mexico
Pedraza-Escalona M.:
Instituto de Química, Universidad Nacional, Autonoma Mexico, Circuito Exterior, Cd. Univ., Mexico, D.F. 04510, Mexico
Mendoza G.:
Facultad de Medicina, Universidad Nacional, Autonoma de Mexico, Mexico, D.F., Mexico
Hernández-Santoyo A.:
Instituto de Química, Universidad Nacional, Autonoma Mexico, Circuito Exterior, Cd. Univ., Mexico, D.F. 04510, Mexico
Rodríguez-Romero A.:
Instituto de Química, Universidad Nacional, Autonoma Mexico, Circuito Exterior, Cd. Univ., Mexico, D.F. 04510, Mexico
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