ADNP Gene
Overview
flowchart TD
ADNP["ADNP"] -->|"interacts with"| AUTOPHAGY["AUTOPHAGY"]
ADNP["ADNP"] -->|"expressed in"| Cardiac["Cardiac"]
ADNP["ADNP"] -->|"associated with"| Ms["Ms"]
ADNP["ADNP"] -->|"expressed in"| Autism["Autism"]
ADNP["ADNP"] -->|"interacts with"| Tauopathy["Tauopathy"]
ADNP["ADNP"] -->|"therapeutic target"| Autism["Autism"]
ADNP["ADNP"] -->|"interacts with"| Als["Als"]
ADNP["ADNP"] -->|"activates"| Alzheimer["Alzheimer"]
ADNP["ADNP"] -->|"protects against"| Autism["Autism"]
ADNP["ADNP"] -->|"activates"| Schizophrenia["Schizophrenia"]
ADNP["ADNP"] -->|"activates"| Als["Als"]
ADNP["ADNP"] -->|"protects against"| Aging["Aging"]
ADNP["ADNP"] -->|"inhibits"| Alzheimer["Alzheimer"]
ADNP["ADNP"] -->|"causes"| Aging["Aging"]
style ADNP fill:#4fc3f7,stroke:#333,color:#000
ADNP (Activity-Dependent Neuroprotective Protein) is a homeobox-containing transcription factor essential for brain development and neuronal survival. ADNP is one of the most frequently mutated genes in [autism spectrum disorder](/diseases/autism) (Helsmoortel-Van der Aa syndrome) and has emerged as a critical player in [Alzheimer's disease](/diseases/alzheimers-disease) through its direct interaction with [tau](/proteins/tau). The ADNP-derived peptide NAP (davunetide) represents a promising neuroprotective therapeutic strategy that stabilizes [microtubules](/mechanisms/microtubule-dynamics) and prevents tau pathology.
...ADNP Gene
Overview
Mermaid diagram (expand to render)
ADNP (Activity-Dependent Neuroprotective Protein) is a homeobox-containing transcription factor essential for brain development and neuronal survival. ADNP is one of the most frequently mutated genes in [autism spectrum disorder](/diseases/autism) (Helsmoortel-Van der Aa syndrome) and has emerged as a critical player in [Alzheimer's disease](/diseases/alzheimers-disease) through its direct interaction with [tau](/proteins/tau). The ADNP-derived peptide NAP (davunetide) represents a promising neuroprotective therapeutic strategy that stabilizes [microtubules](/mechanisms/microtubule-dynamics) and prevents tau pathology.
<div class="infobox infobox-gene"> [@mandel2007]
<div class="infobox-header">ADNP</div> [@helsmoortel2014]
<table> [@oz2014]
<tr><td class="infobox-label">Full Name</td><td>Activity-Dependent Neuroprotective Protein</td></tr> [@ivashkopachima2019]
<tr><td class="infobox-label">Gene Symbol</td><td>ADNP</td></tr> [@gozes2020]
<tr><td class="infobox-label">Chromosomal Location</td><td>20q13.13</td></tr> [@grigg2020]
<tr><td class="infobox-label">NCBI Gene ID</td><td>[23394](https://www.ncbi.nlm.nih.gov/gene/23394)</td></tr> [@hacohenkleiman2018]
<tr><td class="infobox-label">OMIM</td><td>[611386](https://omim.org/entry/611386)</td></tr>
<tr><td class="infobox-label">Ensembl ID</td><td>[ENSG00000101126](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000101126)</td></tr>
<tr><td class="infobox-label">UniProt ID</td><td>[Q9H2P0](https://www.uniprot.org/uniprot/Q9H2P0)</td></tr>
<tr><td class="infobox-label">Protein</td><td>[ADNP Protein](/proteins/adnp-protein)</td></tr>
<tr><td class="infobox-label">Associated Diseases</td><td>[Alzheimer's disease](/diseases/alzheimers-disease), [Autism (Helsmoortel-Van der Aa)](/diseases/autism), [FTD](/diseases/frontotemporal-dementia), [Parkinson's disease](/diseases/parkinsons-disease)</td></tr>
</table>
</div>
Function
ADNP encodes a 1,102 amino acid protein containing a homeobox domain, nine zinc fingers, and a PxVxL motif that mediates interaction with the SWI/SNF chromatin remodeling complex through [HP1](/genes/cbx5). ADNP functions at multiple levels in the nervous system:
Transcriptional Regulation
ADNP acts as a transcription factor that regulates the expression of hundreds of genes critical for neuronal development and maintenance. ADNP binds chromatin through its homeobox domain and recruits the BAF (BRG1/BRM-associated factor) chromatin remodeling complex via its PxVxL motif. Target genes include those involved in:
- Axon guidance and neural migration ([SLIT1](genes/SLIT1), [ROBO1](genes/ROBO1))
- Synaptic plasticity ([BDNF](/genes/bdnf), [ARC](/genes/arc))
- [Autophagy](/entities/autophagy) and proteostasis ([BECN1](/genes/becn1), [LC3](/genes/map1lc3b))
- Immune modulation ([TNF](/genes/tnf), [IL6](/genes/il6))
Microtubule Stabilization
The ADNP-derived octapeptide NAP (NAPVSIPQ) binds the microtubule end-binding proteins EB1 and EB3, promoting microtubule dynamics and stability. This interaction is critical for:
- Maintaining axonal transport integrity via [kinesin](/genes/kif5a) and [dynein](/genes/dync1h1) motor proteins
- Stabilizing [dendritic spines](/cell-types/dendritic-spines) through microtubule invasion into spines
- Protecting against [tau](/genes/mapt) hyperphosphorylation-induced microtubule destabilization
Tau Interaction
ADNP directly interacts with [tau protein](/proteins/tau) through the SH3-binding domain. Notably:
- ADNP competes with [FYN](/genes/fyn) kinase for tau binding at the dendritic compartment
- ADNP-tau interaction protects against tau-mediated toxicity at the [postsynaptic density](/cell-types/postsynaptic-densities)
- Loss of ADNP function leads to tau hyperphosphorylation and tauopathy
Disease Associations
Helsmoortel-Van der Aa Syndrome (ADNP Syndrome)
De novo mutations in ADNP are one of the most common single-gene causes of autism, accounting for approximately 0.17% of ASD cases. Over 50 pathogenic mutations have been identified, predominantly truncating variants in exon 5. Clinical features include:
- Intellectual disability and global developmental delay
- Autism spectrum features (social communication deficits, repetitive behaviors)
- Hypotonia and motor planning difficulties
- Characteristic facial features
- Feeding difficulties in early life
Alzheimer's Disease
ADNP has a multifaceted relationship with [Alzheimer's disease](/diseases/alzheimers-disease):
- ADNP expression increases early in AD as a compensatory neuroprotective response but declines in advanced stages
- ADNP protein levels in serum and lymphocytes are reduced in mild cognitive impairment (MCI) and AD patients compared to controls
- ADNP haploinsufficiency in mouse models produces tauopathy, neuroinflammation, and cognitive deficits
- ADNP p.Tyr719* mutation carriers develop early-onset dementia with tau and [TDP-43](/mechanisms/tdp-43-proteinopathy) pathology
- The NAP peptide derived from ADNP protects against [amyloid-beta](/proteins/amyloid-beta) toxicity in neuronal cultures
Tauopathies and Frontotemporal Dementia
ADNP mutations produce a specific pattern of tau pathology:
- Hyperphosphorylated tau deposits in frontal and temporal cortices
- Comorbid [TDP-43](/genes/tardbp) pathology, suggesting shared proteostatic mechanisms
- ADNP deficiency promotes tau missorting from axons to the somatodendritic compartment
Parkinson's Disease
Reduced ADNP expression has been reported in the [substantia nigra](/brain-regions/substantia-nigra) of PD patients. The NAP peptide protects dopaminergic [neurons](/entities/neurons) against [MPTP](/mechanisms/mptp-model)-induced toxicity in animal models.
Expression
ADNP is broadly expressed throughout the brain with highest levels in:
- Cerebral [cortex](/brain-regions/cortex) — particularly prefrontal and temporal regions
- [Hippocampus](/brain-regions/hippocampus) — [CA1](/cell-types/ca1-pyramidal-neurons) and [CA3](/cell-types/ca3-pyramidal-neurons) pyramidal neurons, [dentate gyrus](/cell-types/dentate-gyrus-granule-cells)
- Cerebellum — Purkinje cells and granule cells
- Hypothalamus and thalamus
- [Astrocytes](/entities/astrocytes) — ADNP is expressed in both neurons and [astrocytes](/cell-types/astrocytes), with astrocytic ADNP contributing to neuroprotective paracrine signaling
Expression pattern via [Allen Brain Atlas](https://portal.brain-map.org/).
Therapeutic Targeting
NAP/Davunetide (AL-108)
The NAP peptide (NAPVSIPQ), derived from the ADNP active site, is the most advanced ADNP-based therapeutic:
- Mechanism: Stabilizes microtubules via EB1/EB3 binding, protects against tau pathology, reduces neuroinflammation
- Clinical trials: Phase II trials in amnestic MCI showed improved memory; Phase II/III trial in [progressive supranuclear palsy](/diseases/progressive-supranuclear-palsy) (PSP) did not meet primary endpoints but showed biomarker improvements
- Intranasal delivery: AL-108 formulation demonstrated CNS penetration and cognitive benefits in preclinical models
- Combination potential: NAP synergizes with the ADNP-derived peptide SKIP, enhancing neuroprotection
CP201 (ADNP Gene Therapy)
Gene therapy approaches using AAV-ADNP are being developed for ADNP syndrome, showing restoration of social behavior and cognitive function in Adnp-haploinsufficient mice.
Key Publications
External Links
- [NCBI Gene: ADNP](https://www.ncbi.nlm.nih.gov/gene/23394)
- [UniProt: Q9H2P0](https://www.uniprot.org/uniprot/Q9H2P0)
- [OMIM: 611386](https://omim.org/entry/611386)
- [GeneCards: ADNP](https://www.genecards.org/cgi-bin/carddisp.pl?gene=ADNP)
References
[Bassan et al., Complete sequence of a novel protein containing a femtomolar-activity-dependent neuroprotective peptide (1999) (1999)](https://doi.org/10.1046/j.1471-4159.1999.0721283.x)
[Mandel et al., Activity-dependent neuroprotective protein (ADNP) differentially interacts with chromatin to regulate genes essential for embryogenesis (2007) (2007)](https://doi.org/10.1002/dvdy.21265)
[Helsmoortel et al., A SWI/SNF-related autism syndrome caused by de novo mutations in ADNP (2014) (2014)](https://doi.org/10.1038/ng.2899)
[Oz et al., The NAP motif of activity-dependent neuroprotective protein (ADNP) regulates dendritic spines through microtubule end binding proteins (2014) (2014)](https://doi.org/10.1038/mp.2013.152)
[Ivashko-Pachima et al., Discovery of autism/intellectual disability somatic mutations in Alzheimer's brains: mutated ADNP cytoskeletal impairments are reversed by NAP (2019) (2019)](https://doi.org/10.1038/s41380-019-0428-1)
[Unknown, Gozes I., The ADNP Syndrome and CP201 (NAP) Potential and Hope (2020) (2020)](https://doi.org/10.3389/fnins.2020.00225)
[Grigg et al., Tauopathy in the young autistic brain: novel biomarker and therapeutic target (2020) (2020)](https://doi.org/10.1038/s41398-020-0751-4)
[Hacohen-Kleiman et al., ADNP/NAP dramatically increase microtubule end-binding protein-tau interaction: a novel avenue for protection against tauopathy (2018) (2018)](https://doi.org/10.1038/s41380-017-0004-6)Pathway Diagram
The following diagram shows the key molecular relationships involving ADNP Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)