Ch. 12 - BiosignalingWorksheetSee all chapters
All Chapters
Ch. 1 - Introduction to Biochemistry
Ch. 2 - Water
Ch. 3 - Amino Acids
Ch. 4 - Protein Structure
Ch. 5 - Protein Techniques
Ch. 6 - Enzymes and Enzyme Kinetics
Ch. 7 - Enzyme Inhibition and Regulation
Ch. 8 - Protein Function
Ch. 9 - Carbohydrates
Ch. 10 - Lipids
Ch. 11 - Biological Membranes and Transport
Ch. 12 - Biosignaling
Clutch Review 1: Nucleic Acids, Lipids, & Membranes
Clutch Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Clutch Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism
Clutch Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Sections
Introduction to Biosignaling
G protein-Coupled Receptors
Stimulatory Adenylate Cyclase GPCR Signaling
cAMP & PKA
Inhibitory Adenylate Cyclase GPCR Signaling
Drugs & Toxins Affecting GPCR Signaling
Recap of Adenylate Cyclase GPCR Signaling
Phosphoinositide GPCR Signaling
PSP Secondary Messengers & PKC
Recap of Phosphoinositide Signaling
Receptor Tyrosine Kinases
Insulin
Insulin Receptor
Insulin Signaling on Glucose Metabolism
Recap Of Insulin Signaling in Glucose Metabolism
Insulin Signaling as a Growth Factor
Recap of Insulin Signaling As A Growth Factor
Recap of Insulin Signaling
Jak-Stat Signaling
Lipid Hormone Signaling
Summary of Biosignaling
Signaling Defects & Cancer

Concept #1: Inhibitory Adenylate Cyclase GPCR Signaling

Practice: The addition of the nonhydrolyzable GTP-analog, GTPγS (shown below), is a common cell culture technique. If only affecting the inhibitory pathway, what effect would GTPγS have on cellular cAMP levels?

Practice: If a chemical is an inhibitor of the enzyme adenylyl cyclase, which of the following steps in the GPCR signaling pathway would be directly blocked?

Concept #2: GPCR Desensitization 

Example #1: What conclusion can be made from the results/data?

Practice: How does GPCR termination differ from GPCR desensitization?

Practice: Which of the following statements about beta-arrestin and GPCRs is TRUE?

Practice: Which of the following are involved in the desensitization of the β-adrenergic receptor?