Human Kunitz-type protease inhibitor variants

Abstract

A variant of the C-terminal Kunitz-type protease inhibitor domain of the .alpha.3 chain of human type VI collagen, the variant comprising the following amino acid sequence X.sup.1 X.sup.16 Asp Ile Cys Lys Leu Pro Lys Asp X.sup.2 Gly X.sup.3 Cys X.sup.4 X.sup.5 X.sup.6 X.sup.7 X.sup.8 X.sup.9 Trp Tyr Tyr Asp Pro Asn Thr Lys Ser Cys Ala Arg Phe X.sup.10 Tyr Gly Gly Cys X.sup.11 X.sup.12 X.sup.13 Glu Asn Lys Phe X.sup.14 Ser Gln Lys Glu Cys Glu Lys Val Cys Ala Pro X.sup.15 (SEQ ID NO. 1) wherein X.sup.1, X.sup.15, and X.sup.16 represents a naturally occurring amino acid residues except Cys and X.sup.2 -X.sup.14 each independently respresents a naturally occurring amino acid residue, with the proviso that at least one of the amino acid residues X.sup.1 -X.sup.16 is different from the corresponding amino acid residue of the native sequence. Alternatively, the N-terminal Asp may be preceded by H or 3-5 amino acid residues and the C-terminal Pro may be followed by OH or 3-5 amino acid residues.

Dependencies are inferred from the claim text.