NM_001243133.2:c.-533C>T

Variant names:

• chr1-247418268-C-T
• rs141994679
• NM_001243133.2:c.-533C>T

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_001243133.2(NLRP3):​c.-533C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00173 in 208,566 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0023 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00023 (0 hom.)
• Consequence: NLRP3 NM_001243133.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Benign criteria provided, single submitter B:3
• Conservation: PhyloP100: -1.71
• Publications: 0 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 -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 1-247418268-C-T is Benign according to our data. Variant chr1-247418268-C-T is described in ClinVar as [Benign]. Clinvar id is 296929.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00228 (347/152218) while in subpopulation AFR AF = 0.00744 (309/41540). AF 95% confidence interval is 0.00676. There are 3 homozygotes in GnomAd4. There are 162 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 347 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NLRP3	NM_001243133.2	c.-533C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 10	ENST00000336119.8	NP_001230062.1
NLRP3	NM_001243133.2	c.-533C>T		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.-533C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 10	1	NM_001243133.2	ENSP00000337383.4
NLRP3	ENST00000336119.8	c.-533C>T		5_prime_UTR_variant	Exon 2 of 10	1	NM_001243133.2	ENSP00000337383.4

Frequencies

GnomAD3 genomes AF: 0.00227 AC: 345 AN: 152102 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.00741

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00190

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.000478

GnomAD4 exome AF: 0.000231 AC: 13 AN: 56348 Hom.: 0 Cov.: 0 AF XY: 0.000136 AC XY: 4 AN XY: 29476

African (AFR) AF: 0.00328 AC: 3 AN: 914

American (AMR) AF: 0.000839 AC: 3 AN: 3576

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1064

East Asian (EAS) AF: 0.00 AC: 0 AN: 2856

South Asian (SAS) AF: 0.00 AC: 0 AN: 9076

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 2454

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 196

European-Non Finnish (NFE) AF: 0.000120 AC: 4 AN: 33304

Other (OTH) AF: 0.00103 AC: 3 AN: 2908

GnomAD4 genome AF: 0.00228 AC: 347 AN: 152218 Hom.: 3 Cov.: 32 AF XY: 0.00218 AC XY: 162 AN XY: 74394

African (AFR) AF: 0.00744 AC: 309 AN: 41540

American (AMR) AF: 0.00190 AC: 29 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.000576 AC: 2 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10576

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68020

Other (OTH) AF: 0.000473 AC: 1 AN: 2112

Alfa AF: 0.000279 Hom.: 0

Bravo AF: 0.00263

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, single submitter

Submissions by phenotype

Familial cold autoinflammatory syndrome 1 Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Familial amyloid nephropathy with urticaria AND deafness Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Chronic infantile neurological, cutaneous and articular syndrome Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	3.3
DANN	Benign	0.83
PhyloP100		-1.7
PromoterAI		-0.040	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs141994679; hg19: chr1-247581570;