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Target intelligence / Profile preview
Potassium channel tetramerization domain-containing protein 12 (KCTD12)
- Target
- KCTD12
- Molecular classification
- Other (auxiliary subunit of receptor complex), Regulatory protein, Associated with G protein-coupled receptor (GPCR) complexes
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Overview
Potassium channel tetramerization domain-containing protein 12 (KCTD12) is a regulatory protein predominantly expressed during fetal development in tissues such as the brain and cochlea. KCTD12 encodes a protein with a tetramerization (T1) domain, and acts as an auxiliary subunit of GABA(B) receptors in the nervous system, modulating receptor signaling kinetics, G protein coupling (especially βγ subunits), and receptor desensitization. This modulation impacts neuronal excitability, synaptic transmission, and various cognitive functions. KCTD12 is also implicated in cell cycle regulation and tumorigenesis, with emerging evidence supporting its role as a biomarker and therapeutic target in neuropsychiatric disorders (such as bipolar disorder) and various cancers. The protein has a complex role in cellular regulation, bridging neurotransmission and cell proliferation pathways, and participates in multiple protein-protein interactions within receptor complexes.
- Other names
- BTB/POZ domain-containing protein KCTD12C13orf2KIAA1778PFET1PFETINPredominantly fetal expressed T1 domainTesticular tissue protein Li 100
02
Mechanism of action
Modulation of GABA(B) receptor desensitization by regulating G protein βγ subunit interaction; Influences receptor signaling kinetics and surface expression
03
Biological functions
Regulation of G protein-coupled receptor signaling pathwayModulation of GABA(B) receptor kinetics and pharmacologyNeuronal excitability and synaptic transmissionRegulation of cell cycle progressionPromotion of tumorigenesis via cell cycle transition (G2/M phase)
04
Disease associations
Neuropsychiatric disorders (including bipolar disorder)Cancer (various types, including roles in tumorigenesis and as prognostic marker)
05
Safety considerations
Potential pleiotropic effects, as KCTD12 is involved in diverse neurodevelopmental and oncogenic pathways; manipulation could affect neuronal function and cell cycle
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Biomarkers
Prognostic biomarker in multiple cancersDiagnostic marker for various tumor types
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