aak-1 Antibody

Overview of AAK1 Antibody

The AAK1 Antibody is a specialized immunological tool targeting Adaptor-Associated Protein Kinase 1 (AAK1), a 100–140 kDa intracellular serine/threonine kinase critical for clathrin-mediated endocytosis. AAK1 phosphorylates key substrates such as the μ2 subunit of the AP-2 adaptor complex (AP2M1) and the endocytic regulator NUMB, modulating membrane receptor trafficking and cellular signaling . Research-grade AAK1 antibodies enable detection, quantification, and functional analysis of this kinase in diverse experimental models, including cancer, virology, and neurodegenerative disease studies .

Mechanism of Action and Biological Relevance

AAK1 regulates clathrin-coated vesicle formation by phosphorylating AP2M1 at Thr156, enhancing cargo recognition during endocytosis . It also phosphorylates NUMB, influencing Notch signaling and cell fate determination . Dysregulation of AAK1 is implicated in:

• Cancer: AAK1 promotes ovarian cancer progression via Notch3 pathway activation and glutamine metabolism .

• Viral Infections: Facilitates entry/release of hepatitis C (HCV), dengue (DENV), and Ebola viruses by modulating AP-2/clathrin dynamics .

• Neurological Disorders: Linked to Parkinson’s disease, neuropathic pain, and Alzheimer’s via endocytic pathway disruptions .

Cancer Biology

• Ovarian Cancer: AAK1 knockdown inhibits tumor growth, metastasis, and glutamine dependency in vitro and in vivo .

• Therapeutic Targeting: AAK1 inhibitors (e.g., TIM-098a) block kinase activity (IC₅₀ = 0.24 µM) and reduce early endosome formation in HeLa cells .

Virology

• HCV/DENV Lifecycle: AAK1/GAK inhibitors (sunitinib/erlotinib) reduce viral entry and particle release by impairing AP-2 phosphorylation .

• Antiviral Drug Development: TIM-098a shows promise as a broad-spectrum antiviral agent .

Neuroscience

• Endocytosis Regulation: AAK1 colocalizes with AP-2 and clathrin at neuronal synapses, critical for neurotransmitter receptor trafficking .

Validation and Technical Considerations

• Western Blot: Antibodies like MAB6886 and ab134971 detect AAK1 at ~140 kDa in HeLa, IMR-32, and Neuro-2A lysates .

• Species Cross-Reactivity: Proteintech’s 15353-1-AP recognizes human, mouse, and rat AAK1 with 95% sequence homology in the C-terminal domain .

• Storage: Most antibodies retain stability for 12 months at -20°C to -70°C, with reconstituted aliquots viable for 1–6 months .

Recent Advancements (2024)

• Selective Inhibitors: TIM-098a, derived from Kinobeads-based proteomics, exhibits >100-fold selectivity for AAK1 over CaMKK isoforms, enhancing therapeutic potential .

• Clinical Relevance: AAK1 inhibition synergizes with chemotherapy to regulate senescence escape in cancer cells .