0 item(s)
View cart
You have no items in your shopping cart.
01
Feb
Adenylyl Cyclase (AC) in cAMP Signaling Pathways
Key Enzyme in Cellular Communication and Homeostasis
Adenylyl cyclase (AC) is a central enzyme in cellular signal transduction that catalyzes the conversion of adenosine triphosphate (ATP) into cyclic adenosine monophosphate (cAMP). By generating cAMP as a critical second messenger, AC bridges extracellular stimuli to complex intracellular responses.
Figure 1: Overview of AC-mediated cAMP Production
I. Core Functions and Molecular Mechanisms
- • Signal Transduction Adenylyl cyclase functions as a key effector of G protein–coupled receptor (GPCR) signaling. Upon activation by stimulatory G proteins (Gs), AC converts extracellular signals—such as hormones and neurotransmitters—into potent intracellular cAMP messages.
- • Downstream Regulatory Network Elevated cAMP levels activate protein kinase A (PKA) and Epac, initiating a phosphorylation cascade that modulates gene transcription, ion channel activity, and metabolic flux.
II. Physiological Roles and Disease Associations
Metabolism
Dysregulation is linked to diabetes and obesity via altered glucose and lipid metabolic control.
Cardiovascular
Influences cardiac contractility. Abnormal signaling is a hallmark of hypertension and heart failure.
Neuroscience
Critical for synaptic plasticity and memory. Linked to Alzheimer’s and depression.
III. Research Applications and Therapeutic Relevance
Adenylyl cyclase remains a primary target for pharmacological intervention and biomedical research:
| Approach | Key Modulators/Methods |
|---|---|
| Direct Activation | Forskolin (Standard research tool) |
| Inhibition | SQ22536 (Small molecule inhibitor) |
| Future Therapies | Gene therapy and targeted molecular interventions |
Biofargo team
