Tavernier J, Cornelis S, Devos R, Guisez Y, Plaetinck G, Van der Heyden J
Roche Research Gent, Belgium.
Agents Actions Suppl. 1995;46:23-34. doi: 10.1007/978-3-0348-7276-8_3.
We have performed a detailed structure-function analysis of human interleukin 5 (hIL5) and its receptor. By testing a hIL5 mutant panel in a solid phase binding assay and a proliferation assay using hIL5 dependent cell-lines, areas on hIL5 involved in either the receptor alpha-subunit interaction or in receptor activation were identified. Epitope mapping data of a neutralizing and a non-neutralizing monoclonal antibody were in agreement with the mutant analysis. hIL5 binding areas on the IL5R alpha-subunit were identified by interspecies chimaera analysis. Finally, hIL5 mutants with reduced receptor activation potential have antagonistic properties.
