Abstract: The present invention provides novel peptides, nucleic acids, compounds, compositions and methods for regulating apoptosis, and screening methods for identifying same. Regulation of apoptosis is mediated via IAPi-derived proteins, peptide fragments thereof, and nucleic acids encoding same, stimulating/accelerating or downmodulating/suppressing apoptosis. For stimulation/acceleration of apoptosis, the IAPi-derived proteins or peptide fragments thereof comprise RHG and Trp-box amino acid consensus sequences. Stimulation/acceleration results in self-ubiquitination and auto-degradation of an IAP. For downmodulation/suppression of apoptosis, IAPi-derived proteins or peptide fragments thereof comprising either RHG or Trp-box amino acid consensus sequences, or both, failing to stimulate or suppressing self-ubiquitination and auto-degradation of an IAP, result in suppression of apoptosis.

Abstract: The present invention provides novel peptides, nucleic acids, compounds, compositions and methods for regulating apoptosis, and screening methods for identifying same. Regulation of apoptosis is mediated via IAPi-derived proteins, peptide fragments thereof, and nucleic acids encoding same, stimulating/accelerating or downmodulating/suppressing apoptosis. For stimulation/acceleration of apoptosis, the IAPi-derived proteins or peptide fragments thereof comprise RHG and Trp-box amino acid consensus sequences. Stimulation/acceleration results in self-ubiquitination and auto-degradation of an IAP. For downmodulation/suppression of apoptosis, IAPi-derived proteins or peptide fragments thereof comprising either RHG or Trp-box amino acid consensus sequences, or both, failing to stimulate or suppressing self-ubiquitination and auto-degradation of an IAP, result in suppression of apoptosis.

Abstract: The present invention provides novel peptides, nucleic acids, compounds, compositions and methods for regulating apoptosis, and screening methods for identifying same. Regulation of apoptosis is mediated via IAPi-derived proteins, peptide fragments thereof, and nucleic acids encoding same, stimulating/accelerating or downmodulating/suppressing apoptosis. For stimulation/acceleration of apoptosis, the IAPi-derived proteins or peptide fragments thereof comprise RHG and Trp-box amino acid consensus sequences. Stimulation/acceleration results in self-ubiquitination and auto-degradation of an IAP. For downmodulation/suppression of apoptosis, IAPi-derived proteins or peptide fragments thereof comprising either RHG or Trp-box amino acid consensus sequences, or both, failing to stimulate or suppressing self-ubiquitination and auto-degradation of an IAP, result in suppression of apoptosis.

Abstract: A method for isolating and purifying novel species of E2 ubiquitin-carrier protein, designated E2-F1, is disclosed. A method for preparing enzymatically active fragments of E2-F1 enzyme is also disclosed. The use of purified E2-F1 to produce antibodies is also disclosed. The use of such E2-F1-specific antibodies to detect the presence of E2-F1 in a biological sample, and to inhibit protein degradation are also disclosed. Recombinant DNA molecules which code for E2-F1, and recombinant hosts and vectors which contain E2-F1 coding sequences are also disclosed. The use of such recombinant hosts and vectors to produce E2-F1 protein is also disclosed. The use of purified E2-F1 to identify and to isolate E3 enzyme is also disclosed. Methods for screening substances for the ability to inhibit E2-F1 enzyme activity are also disclosed.