1-247418258-A-T

Position:

• chr1-247418258-A-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_001243133.2(NLRP3):​c.-543A>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00641 in 176,730 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0069 (13 hom., cov: 32)
  • Exomes 𝑓: 0.0038 (0 hom.)
• Consequence: NLRP3 NM_001243133.2 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:3
• Conservation: PhyloP100: 0.237

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 Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BP6: Variant 1-247418258-A-T is Benign according to our data. Variant chr1-247418258-A-T is described in ClinVar as [Benign]. Clinvar id is 296927.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00685 (1035/151042) while in subpopulation NFE AF= 0.00847 (575/67852). AF 95% confidence interval is 0.0079. There are 13 homozygotes in gnomad4. There are 569 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 1035 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NLRP3	NM_001243133.2	c.-543A>T		5_prime_UTR_variant	2/10	ENST00000336119.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NLRP3	ENST00000336119.8	c.-543A>T		5_prime_UTR_variant	2/10	1	NM_001243133.2	P1

Frequencies

GnomAD3 genomes AF: 0.00685 AC: 1035 AN: 150990 Hom.: 13 Cov.: 32

Gnomad AFR AF: 0.000683

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00138

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000838

Gnomad FIN AF: 0.0380

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00847

Gnomad OTH AF: 0.00337

GnomAD4 exome AF: 0.00378 AC: 97 AN: 25688 Hom.: 0 Cov.: 0 AF XY: 0.00352 AC XY: 47 AN XY: 13356

Gnomad4 AFR exome AF: 0.00352

Gnomad4 AMR exome AF: 0.000688

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000683

Gnomad4 SAS exome AF: 0.000508

Gnomad4 FIN exome AF: 0.0124

Gnomad4 NFE exome AF: 0.00531

Gnomad4 OTH exome AF: 0.00232

GnomAD4 genome AF: 0.00685 AC: 1035 AN: 151042 Hom.: 13 Cov.: 32 AF XY: 0.00772 AC XY: 569 AN XY: 73672

Gnomad4 AFR AF: 0.000681

Gnomad4 AMR AF: 0.00138

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000842

Gnomad4 FIN AF: 0.0380

Gnomad4 NFE AF: 0.00847

Gnomad4 OTH AF: 0.00335

Alfa AF: 0.0114 Hom.: 2

Bravo AF: 0.00345

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, single submitter

Submissions by phenotype

Familial cold autoinflammatory syndrome 1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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	-0.93
CADD	Benign	6.1
DANN	Benign	0.30

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: rs116502550; hg19: chr1-247581560;