rs180177493

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 1P and 8B. PP2BP4_StrongBS2

The NM_001243133.2(NLRP3):c.674C>T(p.Ala225Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000181 in 1,613,828 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A225S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00018 ( 1 hom. )

Consequence

NLRP3
NM_001243133.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2O:1

Conservation

PhyloP100: 2.66

Variant links:

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]

NLRP3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PP2

Missense variant where missense usually causes diseases, NLRP3

BP4

Computational evidence support a benign effect (MetaRNN=0.054564387).

BS2

High AC in GnomAd at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NLRP3	NM_001243133.2 linkuse as main transcript	c.674C>T	p.Ala225Val	missense_variant	4/10	ENST00000336119.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NLRP3	ENST00000336119.8 linkuse as main transcript	c.674C>T	p.Ala225Val	missense_variant	4/10	1	NM_001243133.2	P1

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

151950

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00217

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000406

AC:

102

AN:

251316

Hom.:

AF XY:

0.000434

AC XY:

AN XY:

135826

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00226

Gnomad NFE exome

AF:

0.000440

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000181

AC:

264

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000190

AC XY:

138

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00243

Gnomad4 NFE exome

AF:

0.0000908

Gnomad4 OTH exome

AF:

0.000530

GnomAD4 genome

AF:

0.000184

AC:

AN:

151950

Hom.:

Cov.:

AF XY:

0.000256

AC XY:

AN XY:

74196

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00217

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000744

Hom.:

Bravo

AF:

0.0000302

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000502

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial cold autoinflammatory syndrome 1

Uncertain:1Other:1

not provided, no classification provided	literature only	Unité médicale des maladies autoinflammatoires, CHRU Montpellier	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 14, 2019	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 07, 2018

The A227V variant has been reported, using alternative nomenclature, in an individual with rheumatoid arthritis, high leukocyte count and recurrent fever (Verma et al., 2008). The variant is observed in 53/25786 (0.2055%) alleles from individuals of Finnish background in large population cohorts (Lek et al., 2016). The variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. In-silico analyses, including protein predictors and evolutionary conservation, support that this variant does not alter protein structure/function. However, the variant is located in the NACHT domain, which is the major locus of CAPS-associated pathogenic variants (Masters et al., 2009). In summary, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Autoinflammatory syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Jul 01, 2020

- -

NLRP3-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Mar 06, 2021

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Cryopyrin associated periodic syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jul 10, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Uncertain

-0.080

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.32

Eigen_PC

Benign

-0.31

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.80

T;.;T;T;.;T;T;T

M_CAP

Benign

0.072

MetaRNN

Benign

0.055

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.77

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-2.5

N;N;N;N;N;.;.;N

REVEL

Uncertain

0.47

Sift

Uncertain

0.015

D;D;D;D;D;.;.;D

Sift4G

Uncertain

0.0050

D;D;D;D;D;.;.;D

Polyphen

0.38

B;B;B;P;B;.;.;P

Vest4

0.65

MVP

1.0

MPC

0.51

ClinPred

0.058

GERP RS

4.3

Varity_R

0.23

gMVP

0.60

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over