NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

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NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

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NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)</th>
</tr>
<tr>
<td class="label">Approach</td>
<td>Mechanism</td>
</tr>
<tr>
<td class="label">MCC950/CRID3</td>
<td>Inhibits [NLRP3](/entities/nlrp3-inflammasome); may affect NLRP6</td>
</tr>
<tr>
<td class="label">OLT1177 (Dapansutrile)</td>
<td>NLRP3 inhibitor; cross-reactivity?</td>
</tr>
<tr>
<td class="label">ASC inhibitors</td>
<td>Block inflammasome assembly</td>
</tr>
<tr>
<td class="label">Interactor</td>
<td>Type</td>
</tr>
<tr>
<td class="label">ASC (PYCARD)</td>
<td>Adaptor</td>
</tr>
<tr>
<td class="label">Caspase-1</td>
<td>Enzyme</td>
</tr>
<tr>
<td class="label">Pro-IL-1β</td>
<td>Substrate</td>
</tr>
<tr>
<td class="label">Pro-IL-18</td>
<td>Substrate</td>
</tr>
<tr>
<td class="label">TAK1</td>
<td>Kinase</td>
</tr>
<tr>
<td class="label">Microbiome</td>
<td>Ligand source</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/autoimmune" style="color:#ef9a9a">Autoimmune</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/glioblastoma" style="color:#ef9a9a">Glioblastoma</a>, <a href="/wiki/infection" style="color:#ef9a9a">Infection</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class

...

NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)</th>
</tr>
<tr>
<td class="label">Approach</td>
<td>Mechanism</td>
</tr>
<tr>
<td class="label">MCC950/CRID3</td>
<td>Inhibits [NLRP3](/entities/nlrp3-inflammasome); may affect NLRP6</td>
</tr>
<tr>
<td class="label">OLT1177 (Dapansutrile)</td>
<td>NLRP3 inhibitor; cross-reactivity?</td>
</tr>
<tr>
<td class="label">ASC inhibitors</td>
<td>Block inflammasome assembly</td>
</tr>
<tr>
<td class="label">Interactor</td>
<td>Type</td>
</tr>
<tr>
<td class="label">ASC (PYCARD)</td>
<td>Adaptor</td>
</tr>
<tr>
<td class="label">Caspase-1</td>
<td>Enzyme</td>
</tr>
<tr>
<td class="label">Pro-IL-1β</td>
<td>Substrate</td>
</tr>
<tr>
<td class="label">Pro-IL-18</td>
<td>Substrate</td>
</tr>
<tr>
<td class="label">TAK1</td>
<td>Kinase</td>
</tr>
<tr>
<td class="label">Microbiome</td>
<td>Ligand source</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/autoimmune" style="color:#ef9a9a">Autoimmune</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/glioblastoma" style="color:#ef9a9a">Glioblastoma</a>, <a href="/wiki/infection" style="color:#ef9a9a">Infection</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">51 edges</a></td>
</tr>
</table>

<div style="float: right; width: 280px; background: #f8f9fa; padding: 12px; border: 1px solid #ddd; border-radius: 4px; margin: 0 0 1em 1em; font-size: 0.9em;">
<h3 style="margin-top: 0; border-bottom: 1px solid #ccc;">NLRP6 Protein</h3>
<table style="width: 100%; border-collapse: collapse;">
<tr><td style="padding: 4px 0;"><strong>Symbol:</strong></td><td>NLRP6</td></tr>
<tr><td style="padding: 4px 0;"><strong>Also known as:</strong></td><td>NALP6, PYPAF5, CIAS5</td></tr>
<tr><td style="padding: 4px 0;"><strong>UniProt:</strong></td><td>[P59044](https://www.uniprot.org/uniprot/P59044)</td></tr>
<tr><td style="padding: 4px 0;"><strong>Gene:</strong></td><td>[NLRP6](/genes/nlrp6)</td></tr>
<tr><td style="padding: 4px 0;"><strong>MW:</strong></td><td>100.9 kDa</td></tr>
<tr><td style="padding: 4px 0;"><strong>Location:</strong></td><td>Cytoplasm</td></tr>
<tr><td style="padding: 4px 0;"><strong>PDB:</strong></td><td>[3QF2](https://www.rcsb.org/structure/3QF2)</td></tr>
</table>
</div>

Overview

NLRP6 (NACHT, LRR and PYD Domains-Containing Protein 6) is a member of the NLR (NOD-like receptor) family of pattern recognition receptors that forms an inflammasome complex in response to microbial and endogenous danger signals. While less studied than its family member [NLRP3](/proteins/nlrp3), NLRP6 plays critical roles in maintaining gut homeostasis, regulating the [gut-brain axis](/entities/gut-brain-axis), and modulating neuroinflammation[@grenier2002].

NLRP6 has emerged as a key player in the bidirectional communication between the gut [microbiome](/entities/microbiome) and the central nervous system, with implications for neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, and multiple sclerosis[@wlodarska2014][@levy2015].

Structure and Domain Architecture

NLRP6 is an 892-amino acid protein with the characteristic NLR domain structure:

PYD Domain (Pyrin Domain, residues 1-92):

Death domain superfamily member
Mediates homotypic interactions with ASC (PYCARD)
Initiates inflammasome assembly

NACHT Domain (residues 143-420):

Central nucleotide-binding domain
ATPase activity required for oligomerization
Contains Walker A and Walker B motifs
Autoinhibitory in the resting state

LRR Domain (Leucine-Rich Repeats, residues 460-892):

C-terminal sensor domain
Detects ligands and regulates activation
Multiple LRR motifs form a horseshoe structure[@hu2015]

Inflammasome Assembly

Upon activation, NLRP6 oligomerizes and recruits:

ASC (PYCARD): Via PYD-PYD interactions

Pro-caspase-1: Via CARD-CARD interactions with ASC

Pro-caspase-11: Can be recruited independently in some contexts

This results in formation of the ASC speck and caspase-1 activation[@elinav2011].

Normal Function

Gut Homeostasis

NLRP6 is critical for intestinal health:

Mucus Secretion: NLRP6 regulates goblet cell mucus granule exocytosis and maintains the mucus barrier[@birchenough2016].

Microbiome Composition: NLRP6 deficiency leads to dysbiosis characterized by:

Expansion of Prevotellaceae
Reduced Bacteroidetes
Increased TM7 bacteria

Antimicrobial Peptides: NLRP6 regulates secretion of antimicrobial peptides including RegIIIγ and cryptdins.

Epithelial Repair: NLRP6 modulates intestinal stem cell proliferation and epithelial regeneration[@radeski2022].

Inflammasome Function

The NLRP6 inflammasome mediates:

IL-1β and IL-18 Maturation: Caspase-1 cleaves pro-IL-1β and pro-IL-18.

Pyroptosis: Caspase-1 activates gasdermin D, causing inflammatory cell death.

IL-18-Mediated Repair: IL-18 promotes tissue repair and antimicrobial responses.

Immune Regulation

NLRP6 has both pro- and anti-inflammatory roles:

Anti-inflammatory: Can suppress [NF-κB](/entities/nf-kb) and MAPK signaling in some contexts.

Pro-inflammatory: Promotes cytokine release and immune cell recruitment via inflammasome activation.

Microbiome Sensing: Detects microbial metabolites and maintains homeostasis[@anand2012].

Role in Neurodegeneration

Gut-Brain Axis

NLRP6's primary relevance to neurodegeneration is through gut-brain communication:

Leaky Gut: NLRP6 deficiency causes intestinal barrier dysfunction, allowing bacterial products to enter circulation.

Systemic Inflammation: Dysbiosis in NLRP6 deficiency leads to systemic inflammation that can affect the brain.

Microbial Metabolites: Altered microbiome composition affects production of neuroactive metabolites:

Short-chain fatty acids (SCFAs)
Tryptophan metabolites
Bile acids[@zhao2023]

Alzheimer's Disease

NLRP6 implications in AD include:

Neuroinflammation: Gut dysbiosis can exacerbate neuroinflammation in AD.

[Aβ](/proteins/amyloid-beta) Pathology: Systemic inflammation accelerates Aβ accumulation.

Microglial Activation: Peripheral inflammation primes [microglia](/cell-types/microglia-neuroinflammation) for enhanced responses.

[Blood-Brain Barrier](/entities/blood-brain-barrier): NLRP6 deficiency may affect BBB integrity through systemic effects[@shen2024].

Parkinson's Disease

The gut-brain axis is particularly relevant in PD:

[α-Synuclein](/proteins/alpha-synuclein): Gut inflammation may trigger α-synuclein aggregation that spreads to the brain.

Vagal Pathway: Inflammatory signals may propagate via the vagus nerve.

Constipation: GI symptoms often precede motor symptoms in PD, suggesting gut involvement.

NLRP6 Expression: NLRP6 is expressed in enteric [neurons](/entities/neurons) and may regulate gut motility[@perezpardo2018].

Multiple Sclerosis

NLRP6 plays complex roles in MS:

EAE Model: NLRP6 deficiency can worsen or improve EAE depending on context.

IL-18 Effects: IL-18 produced by NLRP6 inflammasome has both protective and detrimental effects.

Microbiome Effects: Gut dysbiosis from NLRP6 deficiency affects autoimmune responses.

T Cell Regulation: NLRP6 may regulate Th17 cell differentiation via microbiome effects[@mamantopoulos2017].

Stroke and Neuroinflammation

NLRP6 in cerebral ischemia:

Inflammasome Activation: NLRP6 is upregulated in ischemic brain.

Neuroinflammation: NLRP6 deficiency can reduce inflammatory damage.

BBB Disruption: NLRP6 may contribute to BBB breakdown after stroke[@chen2022].

Therapeutic Targeting

NLRP6 Inhibitors

Therapeutic Strategies

Inflammasome Inhibition: Blocking NLRP6 inflammasome activation may reduce inflammation.

Microbiome Modulation: Probiotics or fecal transplant to correct dysbiosis in NLRP6 deficiency.

IL-18 Supplementation: May restore homeostasis in some contexts.

Barrier Enhancement: Therapies to strengthen gut and blood-brain barriers[@henaomejia2012].

Challenges

Dual Roles: NLRP6 has both protective and harmful effects depending on context.

Tissue Specificity: NLRP6 function differs between gut, brain, and other organs.

Redundancy: Other inflammasomes may compensate for NLRP6 inhibition.

Microbiome Complexity: Effects depend on individual microbiome composition[@das2020].

Key Interactions

References

[Grenier JM, Wang L, Chamaillard M, et al, Functional screening of five PYPAF family members identifies PYPAF5 as a novel regulator of NF-kappaB and caspase-1 (2002)](https://doi.org/10.1016/s0014-5793(02)

[Wlodarska M, Thaiss CA, Nowarski R, et al, NLRP6 inflammasome orchestrates the colonic host-microbial interface by regulating goblet cell mucus secretion (2014)](https://doi.org/10.1016/j.cell.2014.01.026)

[Levy M, Thaiss CA, Zeevi D, et al, Microbiota-Modulated Metabolites Shape the Intestinal Microenvironment by Regulating NLRP6 Inflammasome Signaling (2015)](https://doi.org/10.1016/j.cell.2015.10.048)

[Hu Z, Zhou Q, Chen W, et al, Structural and biochemical basis for induced self-propagation of NLRC4 (2015)](https://doi.org/10.1126/science.aac5489)

[Elinav E, Strowig T, Kau AL, et al, NLRP6 inflammasome regulates colonic microbial ecology and risk for colitis (2011)](https://doi.org/10.1016/j.cell.2011.04.022)

[Birchenough GM, Nyström EE, Johansson ME, et al, A sentinel goblet cell guards the colonic crypt by triggering Nlrp6-dependent Muc2 secretion (2016)](https://doi.org/10.1126/science.aaf7419)

[Radeski D, Cao S, Fung C, et al, NLRP6 modulates intestinal epithelial repair after injury (2022)](https://doi.org/10.1136/gutjnl-2020-322558)

[Anand PK, Malireddi RK, Lukens JR, et al, NLRP6 negatively regulates innate immunity and host defence against bacterial pathogens (2012)](https://doi.org/10.1038/nature11250)

[Zhao Y, Jaber V, Lukiw WJ, Gastrointestinal Tract Microbiome-Derived Pro-Inflammatory Neurotoxins in Alzheimer's Disease (2023)](https://doi.org/10.4172/2329-8847.1000258)

[Shen S, Liao Q, Zhang T, et al, NLRP6 in Alzheimer's disease: A potential therapeutic target (2024)](https://doi.org/10.1016/j.neurobiolaging.2023.08.004)

[Perez-Pardo P, Dodiya HB, Engen PA, et al, Gut-brain axis in Parkinson's disease: The role of gut inflammation and dysbiosis (2018)](https://doi.org/10.1038/s41531-018-0057-3)

[Mamantopoulos M, Ronchi F, Van Hauwermeiren F, et al, Nlrp6- and Asc-Dependent Inflammasomes Do Not Shape the Commensal Gut Microbiota Composition (2017)](https://doi.org/10.1016/j.immuni.2017.07.011)

[Chen S, Sun B, Zheng N, et al, NLRP6 inflammasome deficiency aggravates acute cerebral ischemia/reperfusion injury (2022)](https://doi.org/10.1016/j.neuint.2022.105418)

[Henao-Mejia J, Elinav E, Jin C, et al, Inflammasome-mediated dysbiosis regulates progression of NAFLD and obesity (2012)](https://doi.org/10.1038/nature10809)

[Das S, Shapiro B, Vargas HA, et al, NLRP6 inhibits protective immunity to gut infection (2020)](https://doi.org/10.1016/j.celrep.2020.107815)

Pathway Diagram

The following diagram shows the key molecular relationships involving NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6) discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

NLRP6

▸Metadataorigin_type: v1_polymorphic_backfill

slug	proteins-nlrp6
kg_node_id	NLRP6
entity_type	protein
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-23a0a49a00c3
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'proteins-nlrp6'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

100%

Debates

0

Incoming

306

Outgoing

316

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

NLRP6 Protein (NACHT, LRR and PYD Domains-Containing Protein 6)

Overview

Structure and Domain Architecture

Inflammasome Assembly

Normal Function

Gut Homeostasis

Inflammasome Function

Immune Regulation

Role in Neurodegeneration

Gut-Brain Axis

Alzheimer's Disease

Parkinson's Disease

Multiple Sclerosis

Stroke and Neuroinflammation

Therapeutic Targeting

NLRP6 Inhibitors

Therapeutic Strategies

Challenges

Key Interactions

See Also

References

Pathway Diagram

💬 Discussion