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Internal deletions of amino acids 29-42 of human interleukin-6 (IL-6) differentially affect bioactivity and folding.

par Arcone, R;Fontaine, Véronique ;Coto, I;Brakenhoff, Just P.;Content, Jean ;Ciliberto, G
Référence FEBS letters, 288, 1-2, page (197-200)
Publication Publié, 1991-08

Article révisé par les pairs

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Résumé :

Internal deletions of the human interleukin-6 (IL-6) cDNA have been generated in the region encoding residues 29 to 42. Mutant proteins were produced by in vitro transcription-translation or in Escherichia coli and tested for their biological activity using the hybridoma growth factor (HGF) assay or a transcriptional activation assay on human hepatoma cells. The folding of the mutants was also checked by immunoprecipitation with conformation-specific monoclonal antibodies. The results show that only residues 29 to 34 are crucial for IL-6 activity and that the first two amino acids are probably involved in the definition of the IL-6 active site.