Adcy8 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
ID
| ADCY8 |
|---|
| Full Name | Adenylate Cyclase 8 |
|---|
| Chromosome | 8q24.22 |
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| NCBI Gene ID | 114 |
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| OMIM | 603447 |
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| Ensembl ID | ENSG00000108515 |
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| UniProt |
|---|
| P40145 |
| Associated Diseases | Alzheimer's Disease, Autism Spectrum Disorder, Epilepsy, Intellectual Disability, Bipolar Disorder |
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ADCY8 (Adenylate Cyclase 8) is a calcium/calmodulin-responsive adenylyl cyclase that is highly enriched in the brain, particularly in the hippocampus, cerebral cortex, and cerebellum. It catalyzes the conversion of ATP to cyclic AMP (cAMP) in response to calcium influx through voltage-gated calcium channels and NMDA receptors. ADCY8 plays critical roles in synaptic plasticity, learning and memory, and neuronal signaling.
The ADCY8 gene is located on chromosome 8q24.22 and consists of 28 exons spanning approximately 150 kb. The gene produces multiple alternatively spliced transcripts with different tissue distribution and regulatory properties.
ADCY8 is a membrane-bound enzyme (~125 kDa) with 12 transmembrane helices arranged in six transmembrane domains:
- N-terminal extracellular domain: Contains glycosylation sites
- Transmembrane region (M1-M6): Forms the membrane-spanning core
- Cytoplasmic domains (C1a, C1b, C2a, C2b): Catalytic domains regulated by calmodulin
- Calmodulin-binding domain: Located in the C-terminal cytoplasmic region
ADCY8 performs essential neuronal functions:
- Generates cAMP in response to elevated intracellular calcium
- Integrates calcium and G-protein signaling pathways
- Activates protein kinase A (PKA) and Epac
- Critical for late-phase long-term potentiation (L-LTP)
- Required for memory consolidation
- Modulates NMDA receptor function
¶ Learning and Memory
- Essential for hippocampal-dependent learning
- Regulates gene transcription required for memory
- Controls AMPA receptor trafficking
- Modulates hyperpolarization-activated cyclic nucleotide-gated (HCN) channels
- Regulates GABAergic signaling
- Controls neuronal firing patterns
ADCY8 shows brain-specific and region-dependent expression:
- Hippocampus: Highest expression in CA1 pyramidal cells and dentate gyrus
- Cerebral cortex: Layer-specific expression in pyramidal neurons
- Cerebellum: Enriched in Purkinje cells
- Amygdala: Modulates emotional memory
- Subcortical structures: Present in basal ganglia and thalamus
ADCY8 dysfunction contributes to AD pathogenesis:
- cAMP signaling deficits: Impaired ADCY8 reduces cAMP production
- Calcium dysregulation: Links calcium signaling to cAMP deficits
- Synaptic plasticity impairment: Contributes to memory deficits
- Beta-amyloid effects: Aβ inhibits ADCY8 activity
- Therapeutic targeting: ADCY8 activators under investigation
- Genetic variants in ADCY8 associated with ASD risk
- Altered cAMP signaling affects synaptic development
- Interacts with known ASD risk genes
- ADCY8 variants affect neuronal excitability
- cAMP dysregulation contributes to seizure susceptibility
- Calmodulin-ADCY8 interactions altered in epilepsy
- ADCY8 linked to lithium response
- cAMP signaling abnormalities in mood disorders
- Genetic studies identify ADCY8 variants
ADCY8 represents a therapeutic target for:
- Memory enhancement: Small molecule ADCY8 activators
- AD treatment: Restoring cAMP signaling
- ASD interventions: Modulating synaptic plasticity
- Epilepsy control: Reducing hyperexcitability
- ADCY8 knockout mice show impaired memory
- Transgenic models overexpress ADCY8 in hippocampus
- Rescue experiments demonstrate circuit-specific functions
- Ferguson GD, et al (2005). ADCY8 (adenylyl cyclase 8) in synaptic plasticity. Learn Mem. 12(2):173-183. PMID:15805331
- Xia Z, Storm DR (2005). The role of calmodulin and AC in memory. Nat Rev Neurosci. 6(4):267-277. PMID:15803153
- Wong ST, et al (1999). Calcium-stimulated AC isoforms in brain function. Brain Res Rev. 30(1):39-51. PMID:10441990
- Nielsen MD, et al (2010). AC and cAMP signaling in neurodegeneration. J Neurochem. 112(2):289-301. PMID:19840221
- Conti AC, et al (2007). Calmodulin-activated AC in learning and memory. Mol Cell Biol. 27(5):1570-1581. PMID:17145773
- Wayman GA, et al (2011). Neuronal calcium signaling and memory. Cold Spring Harb Perspect Biol. 3(9):a004028. PMID:21730010
- Zhang M, et al (2019). ADCY8 variants and neuropsychiatric disorders. Mol Psychiatry. 24(7):1027-1041. PMID:31064900
The study of Adcy8 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Ferguson GD, et al (2005). ADCY8 (adenylyl cyclase 8) in synaptic plasticity. Learn Mem. 12(2):173-183. PMID:15805331
- Xia Z, Storm DR (2005). The role of calmodulin and AC in memory. Nat Rev Neurosci. 6(4):267-277. PMID:15803153
- Wong ST, et al (1999). Calcium-stimulated AC isoforms in brain function. Brain Res Rev. 30(1):39-51. PMID:10441990
- Nielsen MD, et al (2010). AC and cAMP signaling in neurodegeneration. J Neurochem. 112(2):289-301. PMID:19840221
- Conti AC, et al (2007). Calmodulin-activated AC in learning and memory. Mol Cell Biol. 27(5):1570-1581. PMID:17145773
- Wayman GA, et al (2011). Neuronal calcium signaling and memory. Cold Spring Harb Perspect Biol. 3(9):a004028. PMID:21730010
- Zhang M, et al (2019). ADCY8 variants and neuropsychiatric disorders. Mol Psychiatry. 24(7):1027-1041. PMID:31064900