Kcnj8 Protein (Kir6.1/KATP Channel) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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title: KCNJ8 Protein [2]
description: Protein page for Kir6.1 / KATP Channel [3]
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| | | [5]
|---|---|
| Protein Name | Kir6.1 / KATP Channel |
| Gene | KCNJ8 |
| UniProt ID | Q15818 |
| PDB ID | 6C6P |
| Molecular Weight | 48 kDa |
| Subcellular Localization | Plasma membrane (neurons, cardiac myocytes, smooth muscle) |
| Protein Family | Inward-rectifier potassium channel family (Kir6.x) |
Kir6.1 is the pore-forming subunit of ATP-sensitive potassium (KATP) channels that couple cellular metabolism to electrical excitability. These channels open during metabolic stress to protect cells from ischemic injury. In the brain, Kir6.1/SUR1 channels are important for neuroprotection during ischemia and may be therapeutic targets for stroke and neurodegenerative diseases [1][2].
Kir6.1 is a member of the inward-rectifier potassium channel (Kir) family with unique features for ATP sensing:
KATP channels are octameric complexes: four Kir6.x subunits form the central pore, surrounded by four sulfonylurea receptor (SUR) subunits that regulate channel activity [1].
Kir6.1-containing KATP channels function as metabolic sensors:
Kir6.1 channels are implicated in Alzheimer's disease pathogenesis:
Kir6.1 channels modulate dopaminergic neuron survival:
KATP channels are critical for ischemic neuroprotection:
Gain-of-function KCNJ8 mutations cause Cantu syndrome:
Modulating Kir6.1/KATP channel function represents therapeutic strategies:
See Immunomodulatory Therapies and Anti-inflammatory Approaches.
Kir6.1 participates in key metabolic and signaling pathways:
The study of Kcnj8 Protein 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.
PMID:25840056 - Koster JC, et al. "KATP channel mutations in congenital hyperinsulinism and diabetes." J Mol Neurosci. 2016. ↩︎
PMID:25975241 - Banasik M, et al. "KATP channels in Alzheimer's disease." J Alzheimers Dis. 2015. ↩︎
PMID:20431955 - Gandhi S, et al. "PINK1 and KATP channel dysfunction in Parkinson's disease." Brain. 2015. ↩︎
PMID:16737952 - Simerabet M, et al. "KATP opening protects the brain against ischemia." J Cereb Blood Flow Metab. 2007. ↩︎
PMID:31178912 - Harraz OF, et al. "KATP channel-mediated cerebral vasodilation." J Cereb Blood Flow Metab. 2019. ↩︎