16-3243205-C-A

Position:

• chr16-3243205-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM1 PM2 PM5 BP4_Moderate

The NM_000243.3(MEFV):​c.2282G>T​(p.Arg761Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R761C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MEFV NM_000243.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.399

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 Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a domain B30.2/SPRY (size 195) in uniprot entity MEFV_HUMAN there are 33 pathogenic changes around while only 4 benign (89%) in NM_000243.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-3243206-G-A is described in Lovd as [Likely_pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.088311076).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MEFV	NM_000243.3	c.2282G>T	p.Arg761Leu	missense_variant	10/10	ENST00000219596.6	NP_000234.1
MEFV	NM_001198536.2	c.*486G>T		3_prime_UTR_variant	9/9		NP_001185465.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MEFV	ENST00000219596.6	c.2282G>T	p.Arg761Leu	missense_variant	10/10	1	NM_000243.3	ENSP00000219596	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	18
DANN	Benign	0.94
DEOGEN2	Benign	0.36	T;.;.
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.025	N
LIST_S2	Benign	0.50	T;T;T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.088	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.51	N;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-2.0	N;N;N
REVEL	Benign	0.13
Sift	Benign	0.086	T;T;T
Sift4G	Benign	0.20	T;T;T
Polyphen		0.064	B;.;.
Vest4		0.12
MutPred		0.64		Loss of methylation at K765 (P = 0.0471);.;.;
MVP		0.40
MPC		0.16
ClinPred		0.12	T
GERP RS		1.3
Varity_R		0.30
gMVP		0.26

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: rs104895097; hg19: chr16-3293205;