Phenotypic Mutation 'Park7' (pdf version)
AllelePark7
Mutation Type nonsense
Chromosome11
Coordinate59,548,010 bp (GRCm38)
Base Change C ⇒ T (forward strand)
Gene Nlrp3
Gene Name NLR family, pyrin domain containing 3
Synonym(s) Cias1, cryopyrin, Pypaf1, NALP3, Mmig1
Chromosomal Location 59,541,568-59,566,956 bp (+)
MGI Phenotype Strain: 3686871
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a pyrin-like protein containing a pyrin domain, a nucleotide-binding site (NBS) domain, and a leucine-rich repeat (LRR) motif. This protein interacts with the apoptosis-associated speck-like protein PYCARD/ASC, which contains a caspase recruitment domain, and is a member of the NALP3 inflammasome complex. This complex functions as an upstream activator of NF-kappaB signaling, and it plays a role in the regulation of inflammation, the immune response, and apoptosis. Mutations in this gene are associated with familial cold autoinflammatory syndrome (FCAS), Muckle-Wells syndrome (MWS), chronic infantile neurological cutaneous and articular (CINCA) syndrome, and neonatal-onset multisystem inflammatory disease (NOMID). Multiple alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. Alternative 5' UTR structures are suggested by available data; however, insufficient evidence is available to determine if all of the represented 5' UTR splice patterns are biologically valid. [provided by RefSeq, Oct 2008]
PHENOTYPE: Mice homozygous for null mutations exhibit attenuated inflammatory responses related to decrease secretion of IL-1beta and IL-18. Mice heterozygous for activating mutations suffer from autoinflammatory attacks that lead to organ failure and death before weaning. [provided by MGI curators]
Accession Number

NCBI RefSeq: NM_145827; MGI:2653833

Mapped Yes 
Amino Acid Change Arginine changed to Stop codon
Institutional SourceBeutler Lab
Gene Model predicted gene model for protein(s): [ENSMUSP00000078440] [ENSMUSP00000098707] [ENSMUSP00000114231]
SMART Domains Protein: ENSMUSP00000078440
Gene: ENSMUSG00000032691
AA Change: R138*

DomainStartEndE-ValueType
PYRIN 4 87 6.39e-33 SMART
FISNA 135 206 1.45e-22 SMART
Pfam:NACHT 216 385 6.7e-52 PFAM
low complexity region 533 539 N/A INTRINSIC
low complexity region 688 697 N/A INTRINSIC
LRR_RI 737 764 1.07e-9 SMART
LRR 766 793 5.13e1 SMART
LRR 794 821 3.86e-7 SMART
LRR 823 850 1.62e0 SMART
LRR 851 878 3.39e-3 SMART
LRR 880 907 1.2e2 SMART
LRR 908 935 2.24e-3 SMART
LRR 937 964 2.16e2 SMART
LRR 965 992 8.73e-6 SMART
Predicted Effect probably null
SMART Domains Protein: ENSMUSP00000098707
Gene: ENSMUSG00000032691
AA Change: R138*

DomainStartEndE-ValueType
PYRIN 4 87 6.39e-33 SMART
FISNA 135 206 1.45e-22 SMART
Pfam:NACHT 216 385 6.7e-52 PFAM
low complexity region 533 539 N/A INTRINSIC
low complexity region 688 697 N/A INTRINSIC
LRR_RI 737 764 1.07e-9 SMART
LRR 766 793 5.13e1 SMART
LRR 794 821 3.86e-7 SMART
LRR 823 850 1.62e0 SMART
LRR 851 878 3.39e-3 SMART
LRR 880 907 1.2e2 SMART
LRR 908 935 2.24e-3 SMART
LRR 937 964 2.16e2 SMART
LRR 965 992 8.73e-6 SMART
Predicted Effect probably null
SMART Domains Protein: ENSMUSP00000114231
Gene: ENSMUSG00000032691
AA Change: R138*

DomainStartEndE-ValueType
PYRIN 4 87 6.39e-33 SMART
Pfam:FISNA 135 173 1.6e-12 PFAM
Predicted Effect probably null
Meta Mutation Damage Score 0.6564 question?
Is this an essential gene? Probably nonessential (E-score: 0.063) question?
Phenotypic Category
Phenotypequestion? Literature verified References
NALP3 inflammasome signaling defect
NLRP3 inflammasome: low response
OVA-specific IgE - increased
Candidate Explorer Status CE: excellent candidate; human score: 0; ML prob: 0.702
Single pedigree
Linkage Analysis Data
Penetrance  
Alleles Listed at MGI

All Mutations and Alleles(21) : Chemically induced (ENU)(9) Chemically induced (other)(1) Targeted(11)

Lab Alleles
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00421:Nlrp3 APN 11 59565943 missense probably damaging 0.99
IGL00573:Nlrp3 APN 11 59565116 missense possibly damaging 0.93
IGL01025:Nlrp3 APN 11 59551887 missense probably benign 0.21
IGL01637:Nlrp3 APN 11 59549378 missense probably damaging 0.99
IGL02010:Nlrp3 APN 11 59549535 missense probably benign
IGL02334:Nlrp3 APN 11 59565083 missense probably benign
IGL02417:Nlrp3 APN 11 59566023 unclassified probably benign
IGL02578:Nlrp3 APN 11 59548401 missense probably damaging 1.00
IGL02710:Nlrp3 APN 11 59565976 missense probably damaging 0.99
IGL02816:Nlrp3 APN 11 59555782 missense probably benign 0.03
IGL03157:Nlrp3 APN 11 59549546 missense possibly damaging 0.80
IGL03334:Nlrp3 APN 11 59549016 missense probably damaging 1.00
Flogiston UTSW 11 59558448 missense probably benign 0.00
nd1 UTSW 11 59565974 missense probably benign 0.45
Nd14 UTSW 11 59555875 missense possibly damaging 0.89
Nd3 UTSW 11 59565974 missense probably benign 0.45
nd5 UTSW 11 59565879 missense probably benign 0.01
nd6 UTSW 11 59549354 missense probably damaging 1.00
nd7 UTSW 11 59555875 missense possibly damaging 0.89
Nd9 UTSW 11 59549354 missense probably damaging 1.00
Park2 UTSW 11 59565128 nonsense probably null
Park3 UTSW 11 59565850 missense probably benign 0.02
Park4 UTSW 11 59549531 missense probably benign 0.19
Park5 UTSW 11 59548476 missense probably damaging 0.99
Park6 UTSW 11 59549036 missense probably damaging 1.00
Park8 UTSW 11 59566199 missense probably benign 0.19
R0008:Nlrp3 UTSW 11 59558448 missense probably benign 0.00
R0008:Nlrp3 UTSW 11 59558448 missense probably benign 0.00
R0052:Nlrp3 UTSW 11 59565128 nonsense probably null
R0362:Nlrp3 UTSW 11 59548797 missense possibly damaging 0.49
R0416:Nlrp3 UTSW 11 59555924 splice site probably benign
R0649:Nlrp3 UTSW 11 59548542 missense possibly damaging 0.83
R0740:Nlrp3 UTSW 11 59548256 missense probably benign 0.01
R0863:Nlrp3 UTSW 11 59565850 missense probably benign 0.02
R1300:Nlrp3 UTSW 11 59555768 missense possibly damaging 0.86
R1414:Nlrp3 UTSW 11 59549531 missense probably benign 0.19
R1622:Nlrp3 UTSW 11 59548476 missense probably damaging 0.99
R1654:Nlrp3 UTSW 11 59543123 missense probably benign 0.03
R1715:Nlrp3 UTSW 11 59543351 missense probably damaging 1.00
R1754:Nlrp3 UTSW 11 59558402 missense possibly damaging 0.80
R1837:Nlrp3 UTSW 11 59548916 missense probably benign 0.00
R1905:Nlrp3 UTSW 11 59549036 missense probably damaging 1.00
R2281:Nlrp3 UTSW 11 59549136 missense possibly damaging 0.70
R4296:Nlrp3 UTSW 11 59549661 missense possibly damaging 0.89
R4305:Nlrp3 UTSW 11 59548010 nonsense probably null
R4540:Nlrp3 UTSW 11 59551899 missense possibly damaging 0.83
R4591:Nlrp3 UTSW 11 59549222 missense probably benign 0.00
R4816:Nlrp3 UTSW 11 59548301 missense probably benign 0.32
R4913:Nlrp3 UTSW 11 59549238 missense probably benign 0.09
R4970:Nlrp3 UTSW 11 59548728 missense probably damaging 1.00
R5051:Nlrp3 UTSW 11 59566199 missense probably benign 0.19
R5112:Nlrp3 UTSW 11 59548728 missense probably damaging 1.00
R5185:Nlrp3 UTSW 11 59565084 missense probably benign 0.05
R5417:Nlrp3 UTSW 11 59549063 missense probably damaging 1.00
R5709:Nlrp3 UTSW 11 59555748 nonsense probably null
R5869:Nlrp3 UTSW 11 59548134 missense probably damaging 1.00
R5898:Nlrp3 UTSW 11 59546852 missense probably benign 0.00
R5953:Nlrp3 UTSW 11 59546791 missense probably benign
R5979:Nlrp3 UTSW 11 59548971 missense probably benign 0.06
R6359:Nlrp3 UTSW 11 59548566 missense probably damaging 0.97
R6723:Nlrp3 UTSW 11 59565192 missense probably damaging 1.00
Z1088:Nlrp3 UTSW 11 59551860 missense possibly damaging 0.67
Mode of Inheritance Autosomal Semidominant
Local Stock Sperm
Repository
Last Updated 2019-01-29 1:32 PM by Diantha La Vine
Record Created 2016-03-23 9:19 PM by Hexin Shi
Record Posted 2016-05-06
Phenotypic Description
Figure 1. Park7 mice exhibited diminished IL-1β secretion in response to priming with lipopolysaccharide (LPS) followed by nigericin treatment. IL-1β levels were determined by ELISA. Normalized data are shown. Abbreviations: WT, wild-type; REF, homozygous reference mice; HET, heterozygous variant mice; VAR, homozygous variant mice. Mean (μ) and standard deviation (σ) are indicated.

The Park7 phenotype was identified among N-nitroso-N-ethylurea (ENU)-mutagenized G3 mice of the pedigree R4305, some of which showed a decreased secretion of the proinflammatory cytokine interleukin (IL)-1β in response to priming with lipopolysaccharide (LPS) followed by nigericin treatment (Figure 1).

Nature of Mutation
Figure 2. Linkage mapping of the reduced IL-1β secretion after nigericin treatment using an additive model of inheritance. Manhattan plot shows -log10 P values (Y-axis) plotted against the chromosome positions of 31 mutations (X-axis) identified in the G1 male of pedigree R4305.  Normalized phenotype data are shown for single locus linkage analysis with consideration of G2 dam identity.  Horizontal pink and red lines represent thresholds of P = 0.05, and the threshold for P = 0.05 after applying Bonferroni correction, respectively.

Whole exome HiSeq sequencing of the G1 grandsire identified 31 mutations. The impaired inflammasome response was linked by continuous variable mapping to a mutation in Nlrp3:  a C to T transition at base pair 59,548,010 (v38) on chromosome 11, or base pair 6,442 in the GenBank genomic region NC_000077.  Linkage was found with an additive model of inheritance (P = 2.239 x 10-7), wherein 8 variant homozygotes and 15 heterozygotes departed phenotypically from 10 homozygous reference mice (Figure 2).  

 

The mutation corresponds to residue 638 in the mRNA sequence NM_145827 within exon 4 of 10 total exons.

 

623 TGTAAGATGTACAGACGACATGTGAGAAGCAGG
133 -C--K--M--Y--R--R--H--V--R--S--R-

 

The mutated nucleotide is indicated in red.  The mutation results in substitution of arginine (R) 138 to a premature stop codon (R138*) in the NLRP3 protein.

Protein Prediction

Figure 3. Domain structure of NLRP3. Shown are the pyrin domain (PYD), NACHT domain, NACHT-associated domain (NAD), and leucine-rich repeat (LRR) domain. Together, the NACHT and NAD domains are known as the nucleotide-binding domain (NBD). The Park7 mutation results in substitution of arginine 138 to a premature stop codon. This image is interactive. Other mutations found in NLRP3 are noted in red. Click on each mutation for more specific information.

The Nlrp3 gene encodes a 1,033 amino acid protein that is a member of the nucleotide-binding and oligomerization domain (NOD)-like receptor (NLR) or CATERPILLER [for CARD, transcription enhancer, R(purine)-binding, pyrin, lots of leucine repeats] family [Figure 3; (1)]. NLRP3 has a pyrin domain (PYD) at the N-terminus (amino acids 1-91). NLRP3 has a C-terminal leucine-rich repeat (LRR) domain (amino acids 739-988), a central oligomerization NACHT usually with a C-terminal extension known as the NACHT associated domain (NAD) that together comprise a nucleotide-binding domain (NBD; amino acids 216-532), and an N-terminal effector domain. The N-terminus of NLRP3 contains a pyrin domain (PYD; amino acids 1-91). The Park7 mutation results in substitution of arginine (R) 138 to a premature stop codon (R138*); Arg138 is within an undefined region between the PYD and NACHT domains.

 

For more information about Nlrp3, please see the record for ND1.
Putative Mechanism

NLRP3 is able to oligomerize through its NBD domain and assemble into large caspase-1-activating multiprotein complexes termed inflammasomes upon the detection of pathogenic or other danger signals in the cytoplasm. A large variety of agents have been shown to activate the NLRP3 inflammasome, and NLRP3 plays an important role in the innate immune response. Mutations within the NBD have been shown to reduce ATP binding, as well as NLRP3 protein function including caspase-1 activation, IL-1β production, cell death, macromolecular complex formation, self-association, and association with apoptosis-associated speck-like protein (ASC). The phenotype of the Park7 mice suggests that the mutated protein, if expressed, is inactive or has reduced activity.  

Primers PCR Primer
Park7(F):5'- CAATGACGACAGCTCGCTCTATAC -3'
Park7(R):5'- GGCTGTCCCGCATTTTAGTC -3'

Sequencing Primer
Park7_seq(F):5'- GCTTCTAGTTGACAGTCAGCAC -3'
Park7_seq(R):5'- CGCATTTTAGTCCGGCCGATG -3'
References

1. Ting, J. P., Lovering, R. C., Alnemri, E. S., Bertin, J., Boss, J. M., Davis, B. K., Flavell, R. A., Girardin, S. E., Godzik, A., Harton, J. A., Hoffman, H. M., Hugot, J. P., Inohara, N., Mackenzie, A., Maltais, L. J., Nunez, G., Ogura, Y., Otten, L. A., Philpott, D., Reed, J. C., Reith, W., Schreiber, S., Steimle, V., and Ward, P. A. (2008) The NLR Gene Family: A Standard Nomenclature. Immunity. 28, 285-287.

Science Writers Anne Murray
Illustrators Katherine Timer
AuthorsHexin Shi and Bruce Beutler