16-3254482-C-G

Position:

chr16-3254482-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM2PM5BP4BP6

The NM_000243.3(MEFV):c.586G>C(p.Gly196Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000239 in 1,587,120 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in Lovd. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G196W) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

MEFV
NM_000243.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:2

Conservation

PhyloP100: -0.403

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-3254482-C-A is described in Lovd as [Likely_pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.32555532).

BP6

Variant 16-3254482-C-G is Benign according to our data. Variant chr16-3254482-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 651794.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=3, Likely_benign=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MEFV	NM_000243.3 link	c.586G>C	p.Gly196Arg	missense_variant	2/10	ENST00000219596.6	NP_000234.1	O15553-2
MEFV	NM_001198536.2 link	c.277+1829G>C		intron_variant			NP_001185465.2	O15553-3D2DTW2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MEFV	ENST00000219596.6 link	c.586G>C	p.Gly196Arg	missense_variant	2/10	1	NM_000243.3	ENSP00000219596.1		O15553-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000246

AC:

AN:

203408

Hom.:

AF XY:

0.00000884

AC XY:

AN XY:

113160

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000457

Gnomad OTH exome

AF:

0.000193

GnomAD4 exome

AF:

0.0000258

AC:

AN:

1434888

Hom.:

Cov.:

AF XY:

0.0000239

AC XY:

AN XY:

712366

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000235

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000291

Gnomad4 OTH exome

AF:

0.0000507

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74372

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000437

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial Mediterranean fever

Uncertain:3

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Jul 16, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Feb 08, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 11, 2022	This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 196 of the MEFV protein (p.Gly196Arg). This variant is present in population databases (rs104895179, gnomAD 0.005%). This missense change has been observed in individual(s) with clinical features of MEFV-related conditions (PMID: 26215181). ClinVar contains an entry for this variant (Variation ID: 651794). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Familial Mediterranean fever;C0085077:Acute febrile neutrophilic dermatosis;C1851347:Familial Mediterranean fever, autosomal dominant

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jun 18, 2024

- -

Acute febrile neutrophilic dermatosis

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Feb 08, 2023

- -

Familial Mediterranean fever, autosomal dominant

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Feb 08, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.45

CADD

Benign

0.96

DANN

Benign

0.82

DEOGEN2

Benign

0.31

Eigen

Benign

-2.0

Eigen_PC

Benign

-2.0

FATHMM_MKL

Benign

0.030

LIST_S2

Benign

0.45

M_CAP

Benign

0.013

MetaRNN

Benign

0.33

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.5

PrimateAI

Benign

0.32

PROVEAN

Benign

0.18

REVEL

Benign

0.14

Sift

Benign

0.051

Sift4G

Benign

0.13

Polyphen

0.0

Vest4

0.71

MutPred

0.39

Gain of MoRF binding (P = 0.0148);

MVP

0.35

MPC

0.14

ClinPred

0.15

GERP RS

-2.3

Varity_R

0.047

gMVP

0.27

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