rs104895155

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBS2_Supporting

The NM_000243.3(MEFV):c.926C>T(p.Thr309Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000252 in 1,613,872 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00024 ( 2 hom. )

Consequence

MEFV
NM_000243.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:2O:1

Conservation

PhyloP100: 0.265

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 Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00816828).

BS2

High Homozygotes in GnomAdExome4 at 2 SD geneVariant has number of homozygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEFV	NM_000243.3 link	c.926C>T	p.Thr309Met	missense_variant	Exon 3 of 10	ENST00000219596.6	NP_000234.1	O15553-2
MEFV	NM_001198536.2 link	c.293C>T	p.Thr98Met	missense_variant	Exon 2 of 9		NP_001185465.2	O15553-3D2DTW2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MEFV	ENST00000219596.6 link	c.926C>T	p.Thr309Met	missense_variant	Exon 3 of 10	1	NM_000243.3	ENSP00000219596.1		O15553-2

Frequencies

GnomAD3 genomes

AF:

0.000361

AC:

AN:

152228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000772

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00227

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000573

AC:

142

AN:

247628

Hom.:

AF XY:

0.000618

AC XY:

AN XY:

134296

show subpopulations

Gnomad AFR exome

AF:

0.000373

Gnomad AMR exome

AF:

0.00136

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00278

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000271

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000240

AC:

351

AN:

1461644

Hom.:

Cov.:

AF XY:

0.000301

AC XY:

219

AN XY:

727126

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.00152

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00266

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000162

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.000361

AC:

AN:

152228

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74378

show subpopulations

Gnomad4 AFR

AF:

0.000772

Gnomad4 AMR

AF:

0.000785

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00227

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000196

Hom.:

Bravo

AF:

0.000355

ESP6500AA

AF:

0.000683

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000692

AC:

Asia WGS

AF:

0.00231

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial Mediterranean fever

Uncertain:3Benign:1Other:1

Sep 24, 2024

Molecular Genetics Laboratory, BC Children's and BC Women's Hospitals

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

May 28, 2019

Mendelics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Unité médicale des maladies autoinflammatoires, CHRU Montpellier

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Jan 07, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 18, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1Benign:1

Mar 19, 2018

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 24233262, 29159471) -

Aug 26, 2020

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The MEFV c.926C>T; p.Thr309Met variant (rs104895155) is reported in the literature in several individuals affected with periodic fever syndromes (Chandrakasan 2014, Infevers database). This variant is found in the South Asian population with an overall allele frequency of 0.28% (85/30576 alleles, including one homozygote) in the Genome Aggregation Database. The threonine at codon 309 is weakly conserved, but computational analyses (SIFT: damaging, PolyPhen-2: benign) predict conflicting effects of this variant on protein structure/function. However, given the lack of clinical and functional data, the significance of the p.Thr309Met variant is uncertain at this time. References: Infevers database: https://infevers.umai-montpellier.fr/web/search.php?n=1 Chandrakasan S et al. Clinical and genetic profile of children with periodic fever syndromes from a single medical center in South East Michigan. J Clin Immunol. 2014 Jan;34(1):104-13. -

not specified

Uncertain:1

Dec 13, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MEFV c.926C>T (p.Thr309Met) 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 0.00057 in 247628 control chromosomes, predominantly at a frequency of 0.0028 within the South Asian subpopulation in the gnomAD database, including 1 homozygote. This frequency is not significantly higher than expected for a pathogenic variant in MEFV causing Familial Mediterranean Fever (0.00057 vs 0.022), allowing no conclusion about variant significance. c.926C>T has been reported in the literature in patients affected with Familial Mediterranean Fever (Chandrakasan_2014), unclassified mongenic auto inflammtory disease (Omoyinmi_2017) and adult onset Still's disease (Sighart_2017) . These reports however, do not provide unequivocal conclusions about association of the variant with Familial Mediterranean Fever. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One ClinVar submitter (evaluation after 2014) cites the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Autoinflammatory syndrome

Uncertain:1

Nov 26, 2021

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.28

T;.;.;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.049

LIST_S2

Benign

0.78

T;T;T;T

M_CAP

Benign

0.027

MetaRNN

Benign

0.0082

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;.;.;.

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.50

N;N;N;N

REVEL

Uncertain

0.31

Sift

Uncertain

0.014

D;D;D;D

Sift4G

Uncertain

0.058

T;T;D;D

Polyphen

0.66

P;.;.;.

Vest4

0.39

MVP

0.61

MPC

0.18

ClinPred

0.014

GERP RS

0.31

Varity_R

0.028

gMVP

0.21

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