NFKBIA Protein

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NFKBIA Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">NFKBIA Protein</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>NFKBIA</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>NFKBIA</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=NFKBIA" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/hepatitis" style="color:#ef9a9a">Hepatitis</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">192 edges</a></td>
</tr>
</table>

Nfkbia Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

IκB Alpha (NFKBIA or IκBα) is a critical inhibitory protein that sequesters [NF-κB](/entities/nf-kb) transcription factors in the cytoplasm. As the primary inhibitor of NF-κB, IκBα plays a central role in regulating inflammatory responses and cell survival pathways. [@supsup2008]

Overview

...

NFKBIA Protein

Introduction

Nfkbia Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

NFKBIA Protein is a protein involved in critical biological pathways relevant to neurodegenerative diseases. It plays important roles in neuronal function, cellular signaling, mitochondrial maintenance, or stress response mechanisms that are essential for neuronal health. [@supsup1996]

Dysregulation or mutations in this protein contribute to the pathogenesis of Alzheimer's disease, Parkinson's disease, and related neurodegenerative disorders through effects on protein function, inflammatory signaling, mitochondrial function, or cell survival pathways. [@supsup2006]

--- [@supsup2007]

Structure

IκBα is a 317 amino acid protein (approximately 37 kDa) belonging to the IκB family of inhibitory proteins. The protein contains: [@supsup2015]

N-terminal regulatory domain (contains serine phosphorylation sites)
Ankyrin repeat domains (6 ankyrin repeats)
C-terminal PEST domain (protein degradation signal)

The ankyrin repeats mediate: [@supsup2009]

Binding to NF-κB dimers (p50/p65)
Cytoplasmic sequestration
Masking of nuclear localization signals (NLS)

Molecular Function

IκBα functions as a molecular inhibitor of NF-κB: [@supsup2012]

Mechanism:

IκBα binds NF-κB (p50/p65) in cytoplasm

Masks nuclear localization signals

Prevents DNA binding

Maintains NF-κB in inactive state

Activation-induced degradation:

IKKβ phosphorylates IκBα at Ser32 and Ser36
Polyubiquitination by β-TrCP
Proteasomal degradation
NF-κB translocates to nucleus

Feedback regulation:

NF-κB induces IκBα transcription
New IκBα terminates NF-κB response
Classic negative feedback loop

Expression Pattern

NFKBIA is inducibly expressed:

Ubiquitous but low basal expression
Highly induced by:
NF-κB (autoregulation)
Cytokines (TNF-α, IL-1)
LPS
Stress signals
Growth factors

Brain expression:

[Neurons](/entities/neurons)
[Astrocytes](/entities/astrocytes)
[Microglia](/entities/microglia)

Role in Neurodegeneration

IκBα/NF-κB dysregulation is implicated in:

Alzheimer's Disease

Reduced IκBα in AD brains
Chronic NF-κB activation
Pro-inflammatory gene expression
[Aβ](/proteins/amyloid-beta)-induced neuroinflammation

Parkinson's Disease

IκBα degradation in substantia nigra
NF-κB activation in dopaminergic neurons
TNF-α-mediated cell death
Glial inflammation

ALS

IκBα reduction in motor neurons
Constitutive NF-κB activation
Inflammatory cell death
SOD1 mutation effects

Stroke/Ischemia

Rapid IκBα degradation after ischemia
NF-κB activation in injured brain
Inflammatory damage
Therapeutic target

Multiple Sclerosis

IκBα dysregulation in lesions
Immune cell NF-κB activation
Demyelination

Therapeutic Implications

IκBα-based therapies:

Proteasome inhibitors (bortezomib) - stabilizes IκBα
IKKβ inhibitors - prevent IκBα degradation
NF-κB DNA-binding inhibitors
Anti-inflammatory compounds

Animal Models

IκBα knockout mice:

Severe runting
Perinatal lethality
Constitutive NF-κB activation
Spontaneous colitis

Transgenic IκBα:

Protected from inflammation
Impaired immune response
Neuroprotection in some models

Research Directions

Current research:

IκBα stabilization strategies
NF-κB inhibitors for neurodegeneration
Gene therapy approaches
Biomarkers of NF-κB activation

Background

The study of Nfkbia 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.

External Links

[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

1 Karin M, Ben-Neriah Y, Phosphorylation meets ubiquitination: the control of NF-κB activity (2000)

2 Hayden MS, Ghosh S, Shared principles in NF-κB signaling (2008)

3 Baldwin AS, The NF-κB and IκB proteins: new discoveries and insights (1996)

4 Mattson MP, Meffert MK, Roles for NF-κB in nerve cell survival, plasticity, and disease (2006)

5 Camandola S, Mattson MP, NF-κB as a therapeutic target in neurodegenerative diseases (2007)

6 Shih RH, Wang CY, Yang CM, NF-κB and its role in neuroinflammation (2015)

7 Kaltschmidt B, Kaltschmidt C, NF-κB in the nervous system (2009)

8 Chen J, et al, IκBα degradation in Alzheimer's disease (2012)

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NFKBIA Protein

NFKBIA Protein

Introduction

Overview

NFKBIA Protein

Introduction

Overview

Structure

Molecular Function

Expression Pattern

Role in Neurodegeneration

Alzheimer's Disease

Parkinson's Disease

ALS

Stroke/Ischemia

Multiple Sclerosis

Therapeutic Implications

Animal Models

Research Directions

Background

External Links

See Also

References