16-3256390-G-C

Variant names:

• chr16-3256390-G-C
• rs149380763
• NM_000243.3:c.198C>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000243.3(MEFV):​c.198C>G​(p.Ala66Ala) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A66A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MEFV NM_000243.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -4.18
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• familial Mediterranean fever

  Inheritance: AD, AR, SD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Myriad Women’s Health, ClinGen
• autosomal recessive familial Mediterranean fever

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• familial Mediterranean fever, autosomal dominant

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP7: Synonymous conserved (PhyloP=-4.18 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000243.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEFV	NM_000243.3	MANE Select	c.198C>G	p.Ala66Ala	synonymous	Exon 1 of 10	NP_000234.1
	MEFV	NM_001198536.2		c.198C>G	p.Ala66Ala	synonymous	Exon 1 of 9	NP_001185465.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEFV	ENST00000219596.6	TSL:1 MANE Select	c.198C>G	p.Ala66Ala	synonymous	Exon 1 of 10	ENSP00000219596.1
	MEFV	ENST00000541159.5	TSL:1	c.198C>G	p.Ala66Ala	synonymous	Exon 1 of 9	ENSP00000438711.1
	MEFV	ENST00000539145.5	TSL:1	n.198C>G		non_coding_transcript_exon	Exon 1 of 7	ENSP00000444471.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.079
DANN	Benign	0.63
PhyloP100		-4.2
PromoterAI		-0.0013	Neutral

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

Other links and lift over

dbSNP: rs149380763; hg19: chr16-3306390;