TUM Library

Animated audio-visual presentation with synchronized narration.

Title from title frames.

Contents: Protein levels in cells are regulated by their rates of synthesis and degradation -- Regulatory proteins are rapidly degraded by the ubiquitin-proteasome pathway -- Examples include many oncogenes, transcription factors and cyclins which control progress through the cell cycle -- NF-kappa B activation in disease depends on degradation of the inhibitor, I-kappa B -- Misfolded or mutant proteins are rapidly degraded -- Neurodegenerative and protein folding diseases -- Two major proteolytic pathways exist in mammalian cells -- Many acid hydrolases exist in lysosomes -- Endocytosed proteins and those in autophagic vacuoles are degraded in lysosomes -- The ubiquitin-proteasome pathway -- 3D structure of ubiquitin -- Formation of the isopeptide bonds during ubiquitin conjugation to proteins -- The ubiquitin-proteasome pathway -- Proteasome function is linked to ATP hydrolysis -- Proteasomes unfold proteins and translocate them into 20S particles -- Three types of peptidase sites -- Proposed mechanism of proteasome inhibitors -- Therapeutic applications of proteasome inhibitors -- Two systems for protein breakdown function in the two pathways for antigen presentation -- Changes in proteasome subunits induced by interferon -- Steps involved in generating antigenic peptides.

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