chr16-3254739-A-G

Variant names:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_000243.3(MEFV):c.329T>C(p.Leu110Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00241 in 1,612,772 control chromosomes in the GnomAD database, including 136 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. L110L) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0029 ( 15 hom., cov: 34)

Exomes 𝑓: 0.0024 ( 121 hom. )

Consequence

MEFV
NM_000243.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:5

Conservation

PhyloP100: 0.501

Variant links:

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]

MEFV links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0020012558).

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.0734 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEFV	NM_000243.3 link	c.329T>C	p.Leu110Pro	missense_variant	Exon 2 of 10	ENST00000219596.6	NP_000234.1	O15553-2
MEFV	NM_001198536.2 link	c.277+1572T>C		intron_variant	Intron 1 of 8		NP_001185465.2	O15553-3D2DTW2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MEFV	ENST00000219596.6 link	c.329T>C	p.Leu110Pro	missense_variant	Exon 2 of 10	1	NM_000243.3	ENSP00000219596.1		O15553-2

Frequencies

GnomAD3 genomes

AF:

0.00288

AC:

438

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0797

Gnomad SAS

AF:

0.00166

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00657

AC:

1625

AN:

247318

Hom.:

AF XY:

0.00605

AC XY:

816

AN XY:

134804

show subpopulations

Gnomad AFR exome

AF:

0.0000651

Gnomad AMR exome

AF:

0.000434

Gnomad ASJ exome

AF:

0.000401

Gnomad EAS exome

AF:

0.0842

Gnomad SAS exome

AF:

0.00121

Gnomad FIN exome

AF:

0.0000466

Gnomad NFE exome

AF:

0.000144

Gnomad OTH exome

AF:

0.00214

GnomAD4 exome

AF:

0.00236

AC:

3448

AN:

1460482

Hom.:

121

Cov.:

AF XY:

0.00228

AC XY:

1656

AN XY:

726570

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000425

Gnomad4 ASJ exome

AF:

0.000344

Gnomad4 EAS exome

AF:

0.0753

Gnomad4 SAS exome

AF:

0.00118

Gnomad4 FIN exome

AF:

0.0000192

Gnomad4 NFE exome

AF:

0.000131

Gnomad4 OTH exome

AF:

0.00296

GnomAD4 genome

AF:

0.00287

AC:

437

AN:

152290

Hom.:

Cov.:

AF XY:

0.00309

AC XY:

230

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0797

Gnomad4 SAS

AF:

0.00166

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00295

Hom.:

Bravo

AF:

0.00313

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ExAC

AF:

0.00620

AC:

750

Asia WGS

AF:

0.0170

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:2

Uncertain significance, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 03, 2019	In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Reported in both the heterozygous and homozygous states in unaffected individuals and in individuals with familial Mediterranean fever (Kim et al., 2006; Tomiyama et al., 2008); This variant is associated with the following publications: (PMID: 24965843, 17329916, 22989844, 23166428, 24797171, 24598070, 10854105, 24929125, 20041150, 25073670, 22534884, 26332735, 29017770, 28482392, 29178647, 26537665, 19967574, 18328141, 25261100, 29642170, 26457478, 29526930, 29151129, 24661635, 32199921, 32735870) -
Uncertain significance, criteria provided, single submitter	clinical testing	Clinical Genetics and Genomics, Karolinska University Hospital	Jan 26, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Feb 28, 2022	- -
Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Familial Mediterranean fever

Uncertain:3Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 02, 2025	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	May 18, 2021	- -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Jan 07, 2020	- -

not specified

Uncertain:1Benign:1

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Oct 14, 2014	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 02, 2022	Variant summary: MEFV c.329T>C (p.Leu110Pro) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0066 in 247780 control chromosomes, predominantly at a frequency of 0.084 within the East Asian subpopulation in the gnomAD database, including 61 homozygotes. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 4-fold of the estimated maximal expected allele frequency for a pathogenic variant in MEFV causing Familial Mediterranean Fever phenotype (0.022), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. However, the variant c.329T>C has also been commonly reported in FMF patients, primarily in the same allele (in cis) with p.E148Q, both in heterozygote and homozygote phases. In addition, multiple publications show lack of cosegregation for the variant and disease (Oshima_2010, Berdeli_2011, and Kim_2007). In Japanese population, the variant's allele frequency is higher in patients than in controls. Case-control studies in Japanese population indicate this variant may associate with increased risk of FMF (OR= 1.78, Migita_2016; OR=4.81, Tsuchiya-Suzuki_2009). Larger case-control studies are needed to validate these findings. At least one functional study demonstrated no damaging effect of this variant (Honda_2021). Three ClinVar submitters (evaluation after 2014) cite the variant as benign/likely benign and three ClinVar submitters (evaluation after 2014) cite it as uncertain significance. In 2018, the experts international study group for systemic autoinflammatory diseases (INSAID) reported a validated classification of uncertain significance for the variant (Van Gijn_2018). Based on the data available at this time, it is unknown whether this variant represents a low penetrance mild common pathogenic variant, modifier, or a risk allele. Therefore, this variant was classified as uncertain significance, until additional information becomes available. -

Autoinflammatory syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

May 03, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.054

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.88

DEOGEN2

Benign

0.25

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.0099

LIST_S2

Benign

0.58

MetaRNN

Benign

0.0020

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.13

REVEL

Benign

0.16

Sift

Benign

0.091

Sift4G

Benign

0.27

Polyphen

0.65

Vest4

0.086

MVP

0.51

MPC

0.19

ClinPred

0.0092

GERP RS

-1.5

Varity_R

0.047

gMVP

0.20

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