16-3242440-C-T

Variant names:

• chr16-3242440-C-T
• rs368896227
• NM_000243.3:c.*701G>A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000243.3(MEFV):​c.*701G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00471 in 150,846 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 0.0048 (0 hom., cov: 29)
  • Exomes 𝑓: 0.0012 (0 hom.)
• Consequence: MEFV NM_000243.3 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.785

Genes affected

MEFV (HGNC:6998): (MEFV innate immunity regulator, pyrin) This gene encodes a protein, also known as pyrin or marenostrin, that is an important modulator of innate immunity. Mutations in this gene are associated with Mediterranean fever, a hereditary periodic fever syndrome. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEFV	NM_000243.3	c.*701G>A		3_prime_UTR_variant	Exon 10 of 10	ENST00000219596.6	NP_000234.1
MEFV	NM_001198536.2	c.*1251G>A		3_prime_UTR_variant	Exon 9 of 9		NP_001185465.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MEFV	ENST00000219596	c.*701G>A		3_prime_UTR_variant	Exon 10 of 10	1	NM_000243.3	ENSP00000219596.1

Frequencies

GnomAD3 genomes AF: 0.00476 AC: 702 AN: 147350 Hom.: 0 Cov.: 29

Gnomad AFR AF: 0.0142

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00407

Gnomad ASJ AF: 0.00817

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000217

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00775

Gnomad NFE AF: 0.000449

Gnomad OTH AF: 0.00791

GnomAD4 exome AF: 0.00117 AC: 4 AN: 3432 Hom.: 0 Cov.: 0 AF XY: 0.000996 AC XY: 2 AN XY: 2008

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00688

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00893

GnomAD4 genome AF: 0.00480 AC: 707 AN: 147414 Hom.: 0 Cov.: 29 AF XY: 0.00494 AC XY: 355 AN XY: 71872

Gnomad4 AFR AF: 0.0143

Gnomad4 AMR AF: 0.00407

Gnomad4 ASJ AF: 0.00817

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000218

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000449

Gnomad4 OTH AF: 0.00786

Alfa AF: 0.000986 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial Mediterranean fever Uncertain:1

Jan 12, 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	0.66
DANN	Benign	0.31

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: rs368896227; hg19: chr16-3292440; COSMIC: COSV54824392; COSMIC: COSV54824392;