MUTANTS OF HUMAN IL-3

Biologically active polypeptide analogue (A) of human IL-3 comprises a deletion of at least 2 residues compared with mature human IL-3. The deletion comprises an N-terminal deletion of upto 14 residues and/or a C-terminal deletion of upto 18 amino acids. Pref. mutants are the substn. mutants; having...

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Bibliographische Detailangaben
Hauptverfasser: VAN LEEN, ROBERT WILLEM, DORSSERS, LAMBERTUS CHRISTIAAN JOHANNES
Format: Patent
Sprache:eng
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Zusammenfassung:Biologically active polypeptide analogue (A) of human IL-3 comprises a deletion of at least 2 residues compared with mature human IL-3. The deletion comprises an N-terminal deletion of upto 14 residues and/or a C-terminal deletion of upto 18 amino acids. Pref. mutants are the substn. mutants; having following substitution(s); Asp21 Glu22 = Lys21 Arg22, Asp36 = Arg36, Glu43 = Asp44Asp44 = Lys43 Arg44, Arg54 Arg55 = Glu54 Asp55, Asp46= Lys46 or Arg46, Glu50 = Lys50 or Arg 50, Glu59 = Lys59 or Pro59 (alpha-helix breaker), Arg63 Ala64 = Pro63 Gly64, Glu75 = Arg75 or Gly75, Lys79 = Glu79, Arg94 = Pro94, His98 Lys100 Asp 101 = Glu98 Asp100 Gln101, Glu106 = Lys106, Arg108 Arg109 Arg110 = Glu108 Asp109 Glu110, Phe113 Try114 = Ala113 Thr114, Cys16 = Ala16, Cys84 = Ala84 or Cys16 Cys84 = Ala16 Ala84. Also claimed are: (1) a DNA fragment (I) contg. a sequence encoding (A); (2) a cloning vehicle contg. (I); (3) a host cell transformed with the vehicle of (2); (4) a process for obtaining (A); and (5) a monoclonal antibody (MAb) directed against an epitope between residues 29 - 34, of mature human IL-3.