Serine substituted mutants of BCL-X.sub.L /BCL-2 associated cell death regulator
First Claim
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1. An isolated polypeptide comprising an amino acid sequence of a mutant BCL-XL /BCL-2 associated cell death regulator (BAD) polypeptide, wherein said amino acid sequence is identical to that of a naturally-occurring mammalian BAD polypeptide except for having an amino acid other than serine at one or both of first and second positions corresponding to position 112 and position 136 of SEQ ID NO:
- 1, said first and second positions being identified by alignment of said amino acid sequence to SEQ ID NO;
1, wherein said naturally-occurring mammalian BAD polypeptide (a) contains a BH1 domain comprising residues 142 to 152 of SEQ ID NO;
1 and (b) contains a BH2 domain, and wherein said mutant BAD polypeptide has cell death agonist activity.
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Abstract
Novel forms of mutant BAD polypeptides or fragments thereof having an amino acid substitution for serine-112 and/or serine-136 are provided along with their encoding polynucleotides. Also disclosed are methods for preparation of the mutant BAD polypeptides and methods for treating disease conditions involving decreased apoptosis.
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18 Claims
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1. An isolated polypeptide comprising an amino acid sequence of a mutant BCL-XL /BCL-2 associated cell death regulator (BAD) polypeptide, wherein said amino acid sequence is identical to that of a naturally-occurring mammalian BAD polypeptide except for having an amino acid other than serine at one or both of first and second positions corresponding to position 112 and position 136 of SEQ ID NO:
- 1, said first and second positions being identified by alignment of said amino acid sequence to SEQ ID NO;
1, wherein said naturally-occurring mammalian BAD polypeptide (a) contains a BH1 domain comprising residues 142 to 152 of SEQ ID NO;
1 and (b) contains a BH2 domain, and wherein said mutant BAD polypeptide has cell death agonist activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- 1, said first and second positions being identified by alignment of said amino acid sequence to SEQ ID NO;
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10. A method for making a mutant BCL-XL /BCL-2 associated cell death regulator (BAD) polypeptide which has cell death agonist activity, the method comprising
(a) selecting an amino acid sequence of a naturally occurring mammalian BAD polypeptide which (1) contains a BH1 domain comprising residues 142 to 152 of SEQ ID NO: - 1, (2) contains a BH2 domain, and (3) contains serine residues at first and second positions corresponding to positions 112 and 136 of SEQ ID NO;
1, said first and second positions being identified by alignment of said amino acid sequence to SEQ ID NO;
1,(b) preparing said mutant BAD polypeptide, said mutant BAD polypeptide containing said amino acid sequence except for an amino acid other than serine at one or both of said first and second positions; and (c) testing said mutant BAD polypeptide for cell death agonist activity. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- 1, (2) contains a BH2 domain, and (3) contains serine residues at first and second positions corresponding to positions 112 and 136 of SEQ ID NO;
Specification