rs199475727

Variant names:

• chr1-247418341-G-A
• rs199475727
• NM_001243133.2:c.-460G>A

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_001243133.2(NLRP3):​c.-460G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000462 in 212,248 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00044 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00053 (0 hom.)
• Consequence: NLRP3 NM_001243133.2 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:3 O:1
• Conservation: PhyloP100: -0.161
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• CINCA syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• cryopyrin-associated periodic syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: Illumina
• familial cold autoinflammatory syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• familial cold autoinflammatory syndrome 1

  Inheritance: AD Classification: STRONG Submitted by: G2P
• Muckle-Wells syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• keratitis fugax hereditaria

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.95).
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000435 (66/151636) while in subpopulation NFE AF = 0.00075 (51/67958). AF 95% confidence interval is 0.000586. There are 0 homozygotes in GnomAd4. There are 31 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 66 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NLRP3	NM_001243133.2	c.-460G>A		5_prime_UTR_variant	Exon 2 of 10	ENST00000336119.8	NP_001230062.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NLRP3	ENST00000336119.8	c.-460G>A		5_prime_UTR_variant	Exon 2 of 10	1	NM_001243133.2	ENSP00000337383.4

Frequencies

GnomAD3 genomes AF: 0.000436 AC: 66 AN: 151522 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000170

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000263

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.0000956

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000750

Gnomad OTH AF: 0.000964

GnomAD4 exome AF: 0.000528 AC: 32 AN: 60612 Hom.: 0 Cov.: 0 AF XY: 0.000370 AC XY: 12 AN XY: 32454

African (AFR) AF: 0.00 AC: 0 AN: 1290

American (AMR) AF: 0.00 AC: 0 AN: 3490

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1266

East Asian (EAS) AF: 0.00 AC: 0 AN: 2822

South Asian (SAS) AF: 0.000287 AC: 3 AN: 10448

European-Finnish (FIN) AF: 0.00110 AC: 3 AN: 2732

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 184

European-Non Finnish (NFE) AF: 0.000736 AC: 26 AN: 35336

Other (OTH) AF: 0.00 AC: 0 AN: 3044

GnomAD4 genome AF: 0.000435 AC: 66 AN: 151636 Hom.: 0 Cov.: 32 AF XY: 0.000418 AC XY: 31 AN XY: 74100

African (AFR) AF: 0.000170 AC: 7 AN: 41276

American (AMR) AF: 0.000263 AC: 4 AN: 15224

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5142

South Asian (SAS) AF: 0.000208 AC: 1 AN: 4812

European-Finnish (FIN) AF: 0.0000956 AC: 1 AN: 10462

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.000750 AC: 51 AN: 67958

Other (OTH) AF: 0.000954 AC: 2 AN: 2096

Alfa AF: 0.000635 Hom.: 0

Bravo AF: 0.000521

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial cold autoinflammatory syndrome 1 Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Familial amyloid nephropathy with urticaria AND deafness Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Chronic infantile neurological, cutaneous and articular syndrome Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not provided Other:1

-

Human Evolutionary Genetics, Institut Pasteur

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.95
CADD	Benign	7.4
DANN	Benign	0.64
PhyloP100		-0.16
PromoterAI		0.066	Neutral

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

Other links and lift over

dbSNP: rs199475727; hg19: chr1-247581643;