We noted you are experiencing viewing problems
- 
        
        Check with your IT department that JWPlatform, JWPlayer and Amazon AWS & CloudFront are not being blocked by your network. The relevant domains are *.jwplatform.com, *.jwpsrv.com, *.jwpcdn.com, jwpltx.com, jwpsrv.a.ssl.fastly.net, *.amazonaws.com and *.cloudfront.net. The relevant ports are 80 and 443.
 - 
        
        Check the following talk links to see which ones work correctly:
Auto Mode
HTTP Progressive Download Send us your results from the above test links at access@hstalks.com and we will contact you with further advice on troubleshooting your viewing problems. - 
        
        No luck yet? More tips for troubleshooting viewing issues
 - 
        
        Contact HST Support access@hstalks.com
 
- 
        Please review our troubleshooting guide for tips and advice on resolving your viewing problems.
 - 
        For additional help, please don't hesitate to contact HST support access@hstalks.com
 
We hope you have enjoyed this limited-length demo
                    
                    This is a limited length demo talk; you may
                    
                      login or
                    
                    review methods of
                    obtaining more access.
                  
                
                
              - The Discovery of Protein Phosphorylation
 - 
                                
                                1. Phosphorylase and the origin of reversible protein phosphorylation
- Prof. Edmond Fischer
 
 - Protein Kinase Cascades
 - The Modulation of Protein Function by Phosphorylation
 - 
                                
                                4. Two is the key to 14-3-3: dimeric mechanical signaling devices
- Prof. Carol MacKintosh
 
 - Protein Phosphatases
 - 
                                
                                5. Structure and mechanisms of protein phosphatases
- Prof. David Barford
 
 - 
                                
                                6. Protein tyrosine phosphatases
- Prof. Jack Dixon
 
 - 
                                
                                7. The regulation of MAP kinase signalling by dual-specificity protein phosphatases
- Prof. Steve M. Keyse
 
 - The Structures of Protein Kinases
 - 
                                
                                9. Protein kinase structure, function and regulation
- Prof. Susan Taylor
 
 - 
                                
                                10. The structural basis for the modulation of protein function by protein phosphorylation
- Prof. Dame Louise N. Johnson
 
 - Biological Systems that are Regulated by Reversible Phosphorylation
 - 
                                
                                11. Protein phosphorylation and the control of protein synthesis
- Prof. Christopher Proud
 
 - 
                                
                                13. Roles of AMPK in energy homeostasis and nutrient sensing
- Prof. Grahame Hardie
 
 - 
                                
                                14. Serine kinases and T lymphocyte biology
- Prof. Doreen Cantrell
 
 - 
                                
                                15. The interplay between protein phosphorylation and ubiquitylation in the NF-κB pathway
- Prof. Zhijian 'James' Chen
 
 - 
                                
                                16. SMAD phosphorylation and the TGF-beta pathway
- Prof. Joan Massagué
 
 - Protein Kinases and Human Disease
 - 
                                
                                17. Function and regulation of the PDK1 kinase
- Prof. Dario Alessi
 
 - 
                                
                                18. LKB1 pathway and its role in cancer
- Prof. Dario Alessi
 
 - 
                                
                                19. WNK1 pathway and its role in regulating hypertension
- Prof. Dario Alessi
 
 - 
                                
                                20. The hyperphosphorylation of tau and Alzheimer's disease
- Prof. Michel Goedert
 
 - Protein Kinases as Targets for the Development of Anti-Cancer Drugs
 - 
                                
                                21. PI3K/AKT signaling in cancer
- Prof. Neal Rosen
 
 - 
                                
                                22. RAS and RAF signaling in melanoma: biology and therapies
- Prof. Richard Marais
 
 - 
                                
                                23. The mTOR kinase as a target for anti-cancer drugs
- Prof. David Sabatini
 
 - Archived Lectures *These may not cover the latest advances in the field
 - 
                                
                                25. AMP-activated protein kinase: regulating cellular and whole body energy balance
- Prof. Grahame Hardie
 
 
Printable Handouts
Navigable Slide Index
- Introduction
 - 55 years ago
 - Studying glycogen phosphorylase
 - Degradation of glycogen - adrenaline
 - Fight or flight
 - Insulin, glycogen synthase and glucagon
 - Louis Leloir
 - How this research started
 - Regulation of phosphorylase
 - Photograph of the Coris
 - Phosphorylase showed no requirement for AMP
 - Edwin Krebs - hesitation
 - Cori's preparation of muscle phosphorylase (1)
 - Purification of phosphorylase
 - Edwin Krebs - Cori's preparation
 - Ca2+ contamination is responsible for activation
 - Edwin Krebs - ashes experiment
 - What was phosphorylated?
 - Activation-inactivation cycle of phosphorylase
 - Edwin Krebs - JBC reviewers
 - Knowledge of phospho proteins in 1950
 - Ca2+ involvement in the crude extracts
 - Phosphorylase kinase is also phosphorylated
 - Sutherland
 - cAMP and hormonal control of glycogenolysis
 - Ca2+ and muscle contraction
 - Single fiber measurement method
 - Tension and phosphorylase kinase activity
 - Effect of the sarcoplasmic reticulum
 - The complete cycle of Ca2+
 - Ubiquitous protein phosphorylation
 - Phosphorylase was a good protein to work on
 - Reciprocal control
 - Control of glycogen synthesis and breakdown
 - Mechanism of activation of GSK-3
 - Not everybody believed in regulation by phos.
 - Looking back at the early days
 - The world - before and after
 - Thank you
 
Topics Covered
- A historical account of the discovery of reversible protein phosphorylation
 - Video clips of the late Edwin Krebs speaking about our early work
 - Reversible protein phosphorylation represents one of the most prevalent mechanism by which cellular events are regulated
 - Establishment of the first hormonal cascade of successive enzymatic reactions initiated by cAMP
 
Talk Citation
Fischer, E. (2010, November 30). Phosphorylase and the origin of reversible protein phosphorylation [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved November 4, 2025, from https://doi.org/10.69645/ROXK9891.Export Citation (RIS)
Publication History
- Published on November 30, 2010
 
Financial Disclosures
- Prof. Edmond Fischer has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.