rs180177458

chr1-247425022-G-A

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Moderate

The NM_001243133.2(NLRP3):c.1573G>A(p.Glu525Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NLRP3 NM_001243133.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1 O:1
• Conservation: PhyloP100: 8.94

Genes affected

NLRP3 (HGNC:16400): (NLR family pyrin domain containing 3) 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 NLRP3 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. The SARS-CoV 3a protein, a transmembrane pore-forming viroporin, has been shown to activate the NLRP3 inflammasome via the formation of ion channels in macrophages. Mutations in this gene are associated with familial cold autoinflammatory syndrome (FCAS), Muckle-Wells syndrome (MWS), chronic infantile neurological cutaneous and articular (CINCA) syndrome, neonatal-onset multisystem inflammatory disease (NOMID), keratoendotheliitis fugax hereditarian, and deafness, autosomal dominant 34, with or without inflammation. 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, Aug 2020]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_001243133.2
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, NLRP3
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.967
• PP5: Variant 1-247425022-G-A is Pathogenic according to our data. Variant chr1-247425022-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 97939.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-247425022-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NLRP3	NM_001243133.2	c.1573G>A	p.Glu525Lys	missense_variant	4/10	ENST00000336119.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NLRP3	ENST00000336119.8	c.1573G>A	p.Glu525Lys	missense_variant	4/10	1	NM_001243133.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cryopyrin associated periodic syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Invitae

Mar 08, 2021

This variant is not present in population databases (ExAC no frequency). This sequence change replaces glutamic acid with lysine at codon 527 of the NLRP3 protein (p.Glu527Lys). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant has been observed in several individuals affected with NLRP3-related disease (PMID: 16081838; 20472245; 29378952; 26245507). This variant is also known as p.Glu525Lys in the literature. ClinVar contains an entry for this variant (Variation ID: 97939). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. -

Familial cold autoinflammatory syndrome 1 Other:1

not provided, no classification provided

literature only

Unité médicale des maladies autoinflammatoires, CHRU Montpellier

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
Cadd	Pathogenic	28
Dann	Pathogenic	1.0
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.97	D;.;D;D;.;D;D;D
M_CAP	Pathogenic	0.34	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.90	D
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-3.9	D;D;D;D;D;.;.;D
REVEL	Pathogenic	0.90
Sift	Pathogenic	0.0	D;D;D;D;D;.;.;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;.;.;D
Polyphen		1.0	D;D;D;D;D;.;.;D
Vest4		0.95
MutPred		0.87		Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);Gain of methylation at E527 (P = 0.0017);
MVP		0.99
MPC		1.4
ClinPred		1.0	D
GERP RS		4.2
Varity_R		0.90
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs180177458; hg19: chr1-247588324; COSMIC: COSV60230233;